initial web rssh stage 1

2026-07-29 04:18:09 +03:00 · 2026-06-03 06:50:57 +02:00
parent bd339ee90c
commit f818ec4f0c
52 changed files with 2173 additions and 10 deletions
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -129,4 +129,9 @@ dependencies {
    implementation 'com.google.android.play:review:2.0.2'

    testImplementation 'junit:junit:4.13.2'
+    testImplementation 'org.json:json:20240303'
+
+    if (project.findProject(':tunnel') != null) {
+        implementation project(':tunnel')
+    }
 }
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -17,6 +17,7 @@
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MICROPHONE" />
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_SPECIAL_USE" />
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE" />

    <application
        android:name=".AndroidCastApplication"
@@ -127,6 +128,21 @@
                android:value="Persistent status bar icon for Android Cast" />
        </service>

+        <service
+            android:name=".remoteaccess.RemoteAccessService"
+            android:exported="false"
+            android:foregroundServiceType="connectedDevice" />
+
+        <service
+            android:name=".remoteaccess.RemoteAccessVpnService"
+            android:exported="false"
+            android:permission="android.permission.BIND_VPN_SERVICE"
+            android:foregroundServiceType="connectedDevice">
+            <intent-filter>
+                <action android:name="android.net.VpnService" />
+            </intent-filter>
+        </service>
+
        <receiver
            android:name=".TrayNotificationReceiver"
            android:exported="false" />
--- a/app/src/main/java/com/foxx/androidcast/AndroidCastApplication.java
+++ b/app/src/main/java/com/foxx/androidcast/AndroidCastApplication.java
@@ -20,6 +20,7 @@ import com.foxx.androidcast.display.WiredDisplayMonitor;
 import com.foxx.androidcast.media.CodecPriorityCatalog;
 import com.foxx.androidcast.network.CastTransportFactory;
 import com.foxx.androidcast.receiver.av.ReceiverAvRuntime;
+import com.foxx.androidcast.remoteaccess.RemoteAccessCoordinator;

 /** Applies saved theme and locale at process start. */
 public class AndroidCastApplication extends Application {
@@ -39,5 +40,6 @@ public class AndroidCastApplication extends Application {
        CastTransportFactory.init(this);
        WiredDisplayMonitor.getInstance(this).ensureRegistered();
        CommercialFeatures.refreshFromPreferences(this);
+        RemoteAccessCoordinator.onBootIfNeeded(this);
    }
 }
--- a/app/src/main/java/com/foxx/androidcast/AppPreferences.java
+++ b/app/src/main/java/com/foxx/androidcast/AppPreferences.java
@@ -61,6 +61,7 @@ public final class AppPreferences {
    private static final String KEY_DEV_DIAG_PING_PONG = "dev_diag_ping_pong";
    private static final String KEY_DEV_DIAG_PING_RESPONSE_MODE = "dev_diag_ping_response_mode";
    private static final String KEY_DEV_BACKEND_NTP_SYNC = "dev_backend_ntp_sync";
+    private static final String KEY_DEV_REMOTE_ACCESS_MODE = "dev_remote_access_mode";

    /** Minimum interval between automatic OTA checks on app launch. */
    public static final long OTA_CHECK_INTERVAL_MS = 12 * 60 * 60 * 1000L;
@@ -428,6 +429,18 @@ public final class AppPreferences {
        prefs(context).edit().putBoolean(KEY_DEV_BACKEND_NTP_SYNC, enabled).apply();
    }

+    public static com.foxx.androidcast.remoteaccess.RemoteAccessMode getDevRemoteAccessMode(Context context) {
+        return com.foxx.androidcast.remoteaccess.RemoteAccessMode.fromStored(
+                prefs(context).getString(KEY_DEV_REMOTE_ACCESS_MODE, com.foxx.androidcast.remoteaccess.RemoteAccessMode.DISABLED.name()));
+    }
+
+    public static void setDevRemoteAccessMode(Context context, com.foxx.androidcast.remoteaccess.RemoteAccessMode mode) {
+        if (mode == null) {
+            mode = com.foxx.androidcast.remoteaccess.RemoteAccessMode.DISABLED;
+        }
+        prefs(context).edit().putString(KEY_DEV_REMOTE_ACCESS_MODE, mode.name()).apply();
+    }
+
    /**
     * Reset user-facing settings shown in Android Cast settings.
     * Developer-only settings are intentionally preserved.
--- a/app/src/main/java/com/foxx/androidcast/DeveloperSettingsActivity.java
+++ b/app/src/main/java/com/foxx/androidcast/DeveloperSettingsActivity.java
@@ -38,12 +38,16 @@ import com.foxx.androidcast.sender.SenderResolutionUiMode;
 import com.foxx.androidcast.dev.DevDiagnosticsController;
 import com.foxx.androidcast.dev.DevNetworkSelfTestController;
 import com.foxx.androidcast.network.diag.CastDiagPing;
+import com.foxx.androidcast.remoteaccess.RemoteAccessCoordinator;
+import com.foxx.androidcast.remoteaccess.RemoteAccessMode;
 import com.foxx.androidcast.stats.ui.SessionStatsAnalyzerActivity;
 import com.google.android.material.tabs.TabLayout;
 import com.google.android.material.textfield.TextInputEditText;

 /** Hidden developer settings (opened via app-info area easter egg). */
 public class DeveloperSettingsActivity extends AppCompatActivity {
+    private static final int REQUEST_VPN_PREPARE = 9107;
+
    private DevDiagnosticsController diagnosticsController;
    private DevNetworkSelfTestController networkSelfTestController;
    private android.view.View settingsPanel;
@@ -51,6 +55,9 @@ public class DeveloperSettingsActivity extends AppCompatActivity {
    private android.view.View networkSelfTestPanel;
    private Spinner videoPresetSpinner;
    private Spinner audioPresetSpinner;
+    private Spinner remoteAccessSpinner;
+    private RemoteAccessMode pendingRemoteAccessMode;
+    private boolean suppressRemoteAccessSpinnerEvents;
    private SeekBar intensitySeek;
    private TextView intensityValue;

@@ -106,6 +113,7 @@ public class DeveloperSettingsActivity extends AppCompatActivity {
        });

        bindAvPresets();
+        bindRemoteAccessSection();
        bindDiagPingSection();
        bindSenderResolutionUiModeSection();
        bindWiredDisplaySection();
@@ -144,11 +152,87 @@ public class DeveloperSettingsActivity extends AppCompatActivity {
                findViewById(R.id.edit_ota_manifest_url),
                findViewById(R.id.check_ota_on_launch));
        bindAvPresets();
+        bindRemoteAccessSection();
        bindSenderResolutionUiModeSection();
        bindWiredDisplaySection();
        bindCommercialSection();
    }

+    private void bindRemoteAccessSection() {
+        remoteAccessSpinner = findViewById(R.id.spinner_dev_remote_access_mode);
+        if (remoteAccessSpinner == null) {
+            return;
+        }
+        RemoteAccessMode[] modes = RemoteAccessMode.values();
+        String[] labels = new String[]{
+                getString(R.string.dev_remote_access_disabled),
+                getString(R.string.dev_remote_access_wireguard),
+                getString(R.string.dev_remote_access_rssh_unavailable),
+        };
+        ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
+                android.R.layout.simple_spinner_item, labels);
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        remoteAccessSpinner.setAdapter(adapter);
+        RemoteAccessMode current = AppPreferences.getDevRemoteAccessMode(this);
+        suppressRemoteAccessSpinnerEvents = true;
+        remoteAccessSpinner.setOnItemSelectedListener(null);
+        remoteAccessSpinner.setSelection(current.ordinal(), false);
+        suppressRemoteAccessSpinnerEvents = false;
+        remoteAccessSpinner.setOnItemSelectedListener(new android.widget.AdapterView.OnItemSelectedListener() {
+            @Override
+            public void onItemSelected(android.widget.AdapterView<?> parent, android.view.View view,
+                    int position, long id) {
+                if (suppressRemoteAccessSpinnerEvents) {
+                    return;
+                }
+                RemoteAccessMode picked = modes[position];
+                if (picked == RemoteAccessMode.RSSH) {
+                    Toast.makeText(DeveloperSettingsActivity.this,
+                            R.string.dev_remote_access_rssh_toast, Toast.LENGTH_SHORT).show();
+                    suppressRemoteAccessSpinnerEvents = true;
+                    remoteAccessSpinner.setSelection(
+                            AppPreferences.getDevRemoteAccessMode(DeveloperSettingsActivity.this).ordinal(), false);
+                    suppressRemoteAccessSpinnerEvents = false;
+                    return;
+                }
+                applyRemoteAccessMode(picked);
+            }
+
+            @Override
+            public void onNothingSelected(android.widget.AdapterView<?> parent) {}
+        });
+    }
+
+    private void applyRemoteAccessMode(RemoteAccessMode mode) {
+        if (mode == RemoteAccessMode.WIREGUARD) {
+            android.content.Intent prep = android.net.VpnService.prepare(this);
+            if (prep != null) {
+                pendingRemoteAccessMode = mode;
+                startActivityForResult(prep, REQUEST_VPN_PREPARE);
+                return;
+            }
+        }
+        AppPreferences.setDevRemoteAccessMode(this, mode);
+        RemoteAccessCoordinator.applyMode(this, mode);
+        Toast.makeText(this, getString(R.string.dev_remote_access_applied, mode.name()), Toast.LENGTH_SHORT).show();
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, android.content.Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        if (requestCode == REQUEST_VPN_PREPARE && pendingRemoteAccessMode != null) {
+            RemoteAccessMode mode = pendingRemoteAccessMode;
+            pendingRemoteAccessMode = null;
+            if (resultCode == RESULT_OK) {
+                AppPreferences.setDevRemoteAccessMode(this, mode);
+                RemoteAccessCoordinator.applyMode(this, mode);
+            } else {
+                bindRemoteAccessSection();
+                Toast.makeText(this, R.string.dev_remote_access_vpn_denied, Toast.LENGTH_LONG).show();
+            }
+        }
+    }
+
    private void bindDiagPingSection() {
        CheckBox enabled = findViewById(R.id.check_dev_diag_ping_pong);
        bindDeveloperCheckbox(enabled, AppPreferences.isDevDiagPingPongEnabled(this),
--- a/app/src/main/java/com/foxx/androidcast/remoteaccess/RemoteAccessCoordinator.java
+++ b/app/src/main/java/com/foxx/androidcast/remoteaccess/RemoteAccessCoordinator.java
@@ -0,0 +1,40 @@
+package com.foxx.androidcast.remoteaccess;
+
+import android.content.Context;
+import android.util.Log;
+
+import com.foxx.androidcast.AppPreferences;
+
+/** Start/stop remote access foreground polling + VPN based on developer mode. */
+public final class RemoteAccessCoordinator {
+    private static final String TAG = "RemoteAccessCoord";
+
+    private RemoteAccessCoordinator() {}
+
+    public static void applyMode(Context context, RemoteAccessMode mode) {
+        Context app = context.getApplicationContext();
+        if (mode == null || mode == RemoteAccessMode.DISABLED) {
+            Log.i(TAG, "disabling remote access");
+            RemoteAccessService.stop(app);
+            RemoteAccessVpnService.stop(app);
+            RemoteAccessService.sendDisableOnce(app);
+            return;
+        }
+        if (mode == RemoteAccessMode.WIREGUARD) {
+            RemoteAccessService.start(app, mode);
+            return;
+        }
+        Log.w(TAG, "unsupported mode " + mode);
+    }
+
+    public static void syncFromPreferences(Context context) {
+        applyMode(context, AppPreferences.getDevRemoteAccessMode(context));
+    }
+
+    public static void onBootIfNeeded(Context context) {
+        RemoteAccessMode mode = AppPreferences.getDevRemoteAccessMode(context);
+        if (mode.isActive()) {
+            RemoteAccessService.start(context.getApplicationContext(), mode);
+        }
+    }
+}
--- a/app/src/main/java/com/foxx/androidcast/remoteaccess/RemoteAccessHeartbeatClient.java
+++ b/app/src/main/java/com/foxx/androidcast/remoteaccess/RemoteAccessHeartbeatClient.java
@@ -0,0 +1,106 @@
+package com.foxx.androidcast.remoteaccess;
+
+import android.content.Context;
+import android.util.Log;
+
+import com.foxx.androidcast.BuildConfig;
+import com.foxx.androidcast.crash.CrashSettingsStore;
+
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+
+/** POST heartbeat type:ra to BE (shared by RemoteAccessService). */
+public final class RemoteAccessHeartbeatClient {
+    private static final String TAG = "RemoteAccessHB";
+    private static final int HTTP_TIMEOUT_MS = 15_000;
+
+    private RemoteAccessHeartbeatClient() {}
+
+    public static String resolveHeartbeatUrl(Context context) {
+        String crash = CrashSettingsStore.load(context).uploadUrl;
+        if (crash != null && !crash.trim().isEmpty()) {
+            return toHeartbeatUrl(crash.trim());
+        }
+        String ota = com.foxx.androidcast.AppPreferences.getOtaChannelUrl(context);
+        if (ota != null && !ota.trim().isEmpty()) {
+            return toHeartbeatUrl(ota.trim());
+        }
+        if (BuildConfig.OTA_CHANNEL_URL_DEFAULT != null && !BuildConfig.OTA_CHANNEL_URL_DEFAULT.trim().isEmpty()) {
+            return toHeartbeatUrl(BuildConfig.OTA_CHANNEL_URL_DEFAULT.trim());
+        }
+        return "";
+    }
+
+    public static String toHeartbeatUrl(String backend) {
+        if (backend.contains("/api/upload.php")) {
+            return backend.replace("/api/upload.php", "/api/heartbeat.php");
+        }
+        if (backend.endsWith("/")) {
+            return backend + "api/heartbeat.php";
+        }
+        return backend + "/api/heartbeat.php";
+    }
+
+    /** @return parsed heartbeat object from response, or null on failure */
+    public static JSONObject postRa(Context context, JSONObject heartbeatBody) throws Exception {
+        String url = resolveHeartbeatUrl(context);
+        if (url.isEmpty()) {
+            throw new IllegalStateException("no_backend_url");
+        }
+        JSONObject req = new JSONObject();
+        req.put("heartbeat", heartbeatBody);
+        String text = httpPostJson(url, req.toString());
+        JSONObject resp = new JSONObject(text);
+        return resp.optJSONObject("heartbeat");
+    }
+
+    private static String httpPostJson(String url, String body) throws Exception {
+        HttpURLConnection c = (HttpURLConnection) new URL(url).openConnection();
+        c.setRequestMethod("POST");
+        c.setConnectTimeout(HTTP_TIMEOUT_MS);
+        c.setReadTimeout(HTTP_TIMEOUT_MS);
+        c.setDoOutput(true);
+        c.setRequestProperty("Content-Type", "application/json; charset=utf-8");
+        byte[] bytes = body.getBytes(StandardCharsets.UTF_8);
+        try (OutputStream os = c.getOutputStream()) {
+            os.write(bytes);
+        }
+        int code = c.getResponseCode();
+        String resp = readBody(c);
+        c.disconnect();
+        if (code < 200 || code >= 300) {
+            Log.w(TAG, "heartbeat HTTP " + code + " body=" + resp);
+            throw new IllegalStateException("http_" + code);
+        }
+        return resp;
+    }
+
+    private static String readBody(HttpURLConnection c) {
+        try (BufferedReader br = new BufferedReader(
+                new InputStreamReader(c.getInputStream(), StandardCharsets.UTF_8))) {
+            StringBuilder sb = new StringBuilder();
+            String line;
+            while ((line = br.readLine()) != null) {
+                sb.append(line);
+                if (sb.length() > 8192) {
+                    break;
+                }
+            }
+            return sb.toString();
+        } catch (Exception e) {
+            try (BufferedReader br = new BufferedReader(
+                    new InputStreamReader(c.getErrorStream(), StandardCharsets.UTF_8))) {
+                String line = br.readLine();
+                return line != null ? line : "";
+            } catch (Exception ignored) {
+                return "";
+            }
+        }
+    }
+}
--- a/app/src/main/java/com/foxx/androidcast/remoteaccess/RemoteAccessMode.java
+++ b/app/src/main/java/com/foxx/androidcast/remoteaccess/RemoteAccessMode.java
@@ -0,0 +1,44 @@
+package com.foxx.androidcast.remoteaccess;
+
+import java.util.Locale;
+
+/** Developer setting: on-demand remote debug transport. */
+public enum RemoteAccessMode {
+    /** Remote access off; tear down tunnels and notify BE. */
+    DISABLED,
+    /** WireGuard outbound tunnel (v1). */
+    WIREGUARD,
+    /** Reverse SSH — reserved; not selectable in UI until implemented. */
+    RSSH;
+
+    public static RemoteAccessMode fromStored(String name) {
+        if (name == null || name.isEmpty()) {
+            return DISABLED;
+        }
+        try {
+            return valueOf(name.trim().toUpperCase(Locale.ROOT));
+        } catch (IllegalArgumentException e) {
+            if ("NONE".equalsIgnoreCase(name)) {
+                return DISABLED;
+            }
+            return DISABLED;
+        }
+    }
+
+    /** BE heartbeat opt_in_mode / capabilities value. */
+    public String toApiValue() {
+        switch (this) {
+            case WIREGUARD:
+                return "wireguard";
+            case RSSH:
+                return "rssh";
+            case DISABLED:
+            default:
+                return "none";
+        }
+    }
+
+    public boolean isActive() {
+        return this == WIREGUARD;
+    }
+}
--- a/app/src/main/java/com/foxx/androidcast/remoteaccess/RemoteAccessService.java
+++ b/app/src/main/java/com/foxx/androidcast/remoteaccess/RemoteAccessService.java
@@ -0,0 +1,226 @@
+package com.foxx.androidcast.remoteaccess;
+
+import android.app.AlarmManager;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Build;
+import android.os.IBinder;
+import android.os.SystemClock;
+import android.util.Log;
+
+import androidx.core.app.NotificationCompat;
+
+import com.foxx.androidcast.AppPreferences;
+import com.foxx.androidcast.DeveloperSettingsActivity;
+import com.foxx.androidcast.DeviceInfo;
+import com.foxx.androidcast.R;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+import java.util.Random;
+import java.util.UUID;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+/** Jittered heartbeat type:ra polling while remote access mode is active. */
+public final class RemoteAccessService extends Service {
+    private static final String TAG = "RemoteAccessSvc";
+
+    public static final String ACTION_START = "com.foxx.androidcast.remoteaccess.START";
+    public static final String ACTION_STOP = "com.foxx.androidcast.remoteaccess.STOP";
+    public static final String ACTION_POLL = "com.foxx.androidcast.remoteaccess.POLL";
+    public static final String ACTION_DISABLE_ONCE = "com.foxx.androidcast.remoteaccess.DISABLE_ONCE";
+    public static final String EXTRA_MODE = "mode";
+
+    private static final int NOTIF_ID = 0x7a00;
+    private static final String CHANNEL_ID = "remote_access";
+    private static final int MIN_POLL_MS = 60_000;
+    private static final int MAX_POLL_MS = 420_000;
+
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
+    private final Random random = new Random();
+    private String sessionRandom = UUID.randomUUID().toString();
+
+    public static void start(Context context, RemoteAccessMode mode) {
+        Intent i = new Intent(context, RemoteAccessService.class);
+        i.setAction(ACTION_START);
+        i.putExtra(EXTRA_MODE, mode.name());
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            context.startForegroundService(i);
+        } else {
+            context.startService(i);
+        }
+    }
+
+    public static void stop(Context context) {
+        Intent i = new Intent(context, RemoteAccessService.class);
+        i.setAction(ACTION_STOP);
+        context.startService(i);
+    }
+
+    public static void sendDisableOnce(Context context) {
+        Intent i = new Intent(context, RemoteAccessService.class);
+        i.setAction(ACTION_DISABLE_ONCE);
+        context.startService(i);
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        String action = intent != null ? intent.getAction() : ACTION_POLL;
+        if (ACTION_STOP.equals(action)) {
+            cancelPoll(this);
+            WireGuardTunnelBridge.tearDown(this);
+            stopForeground(true);
+            stopSelf();
+            return START_NOT_STICKY;
+        }
+        if (ACTION_DISABLE_ONCE.equals(action)) {
+            executor.execute(() -> postDisableHeartbeat());
+            return START_NOT_STICKY;
+        }
+        RemoteAccessMode mode = AppPreferences.getDevRemoteAccessMode(this);
+        if (intent != null && intent.hasExtra(EXTRA_MODE)) {
+            mode = RemoteAccessMode.fromStored(intent.getStringExtra(EXTRA_MODE));
+        }
+        if (!mode.isActive()) {
+            stop(this);
+            return START_NOT_STICKY;
+        }
+        ensureChannel();
+        startForeground(NOTIF_ID, buildNotification(mode));
+        final RemoteAccessMode pollMode = mode;
+        if (ACTION_START.equals(action) || ACTION_POLL.equals(action)) {
+            executor.execute(() -> runPoll(pollMode));
+        }
+        scheduleNextPoll();
+        return START_STICKY;
+    }
+
+    private void runPoll(RemoteAccessMode mode) {
+        try {
+            JSONObject hb = new JSONObject();
+            hb.put("type", "ra");
+            hb.put("status", "enable");
+            hb.put("device_id", DeviceInfo.getDeviceUuid(this));
+            hb.put("random", sessionRandom);
+            hb.put("app_version", com.foxx.androidcast.BuildConfig.VERSION_NAME);
+            hb.put("tunnel_mode", mode.toApiValue());
+            JSONArray caps = new JSONArray();
+            caps.put("wireguard");
+            caps.put("files_app_home");
+            hb.put("capabilities", caps);
+
+            JSONObject resp = RemoteAccessHeartbeatClient.postRa(this, hb);
+            if (resp == null) {
+                return;
+            }
+            String raAction = resp.optString("action", "wait");
+            if ("connect".equals(raAction)) {
+                handleConnect(resp);
+            } else if ("disabled".equals(raAction) || "deny".equals(raAction)) {
+                WireGuardTunnelBridge.tearDown(this);
+            }
+        } catch (Exception e) {
+            Log.w(TAG, "poll failed: " + e.getMessage());
+        }
+    }
+
+    private void postDisableHeartbeat() {
+        try {
+            WireGuardTunnelBridge.tearDown(this);
+            JSONObject hb = new JSONObject();
+            hb.put("type", "ra");
+            hb.put("status", "disable");
+            hb.put("device_id", DeviceInfo.getDeviceUuid(this));
+            hb.put("random", sessionRandom);
+            RemoteAccessHeartbeatClient.postRa(this, hb);
+        } catch (Exception e) {
+            Log.w(TAG, "disable notify failed: " + e.getMessage());
+        }
+    }
+
+    private void handleConnect(JSONObject resp) {
+        if (!"wireguard".equals(resp.optString("tunnel", ""))) {
+            Log.w(TAG, "unsupported tunnel in connect");
+            return;
+        }
+        JSONObject creds = resp.optJSONObject("credentials");
+        String wgConfig = WireGuardConfigBuilder.fromConnectCredentials(creds);
+        if (wgConfig.isEmpty()) {
+            return;
+        }
+        WireGuardTunnelBridge.applyConfig(this, wgConfig);
+    }
+
+    private void scheduleNextPoll() {
+        int delay = MIN_POLL_MS + random.nextInt(MAX_POLL_MS - MIN_POLL_MS + 1);
+        AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
+        if (am == null) {
+            return;
+        }
+        PendingIntent pi = PendingIntent.getService(this, 0,
+                new Intent(this, RemoteAccessService.class).setAction(ACTION_POLL),
+                PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
+        long trigger = SystemClock.elapsedRealtime() + delay;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            am.setAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP, trigger, pi);
+        } else {
+            am.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, trigger, pi);
+        }
+    }
+
+    private static void cancelPoll(Context context) {
+        AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
+        if (am == null) {
+            return;
+        }
+        PendingIntent pi = PendingIntent.getService(context, 0,
+                new Intent(context, RemoteAccessService.class).setAction(ACTION_POLL),
+                PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
+        am.cancel(pi);
+    }
+
+    private Notification buildNotification(RemoteAccessMode mode) {
+        Intent open = new Intent(this, DeveloperSettingsActivity.class);
+        PendingIntent pi = PendingIntent.getActivity(this, 0, open,
+                PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
+        return new NotificationCompat.Builder(this, CHANNEL_ID)
+                .setSmallIcon(R.drawable.ic_notification)
+                .setContentTitle(getString(R.string.dev_remote_access_notification_title))
+                .setContentText(getString(R.string.dev_remote_access_notification_poll, mode.name()))
+                .setContentIntent(pi)
+                .setOngoing(true)
+                .build();
+    }
+
+    private void ensureChannel() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
+            return;
+        }
+        NotificationManager nm = getSystemService(NotificationManager.class);
+        if (nm == null) {
+            return;
+        }
+        NotificationChannel ch = new NotificationChannel(CHANNEL_ID,
+                getString(R.string.dev_remote_access_notification_channel),
+                NotificationManager.IMPORTANCE_LOW);
+        nm.createNotificationChannel(ch);
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    @Override
+    public void onDestroy() {
+        executor.shutdownNow();
+        super.onDestroy();
+    }
+}
--- a/app/src/main/java/com/foxx/androidcast/remoteaccess/RemoteAccessVpnService.java
+++ b/app/src/main/java/com/foxx/androidcast/remoteaccess/RemoteAccessVpnService.java
@@ -0,0 +1,150 @@
+package com.foxx.androidcast.remoteaccess;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.net.VpnService;
+import android.os.Build;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import androidx.core.app.NotificationCompat;
+
+import com.foxx.androidcast.DeveloperSettingsActivity;
+import com.foxx.androidcast.R;
+
+import java.net.InetAddress;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/** Holds WireGuard TUN when tunnel module is not linked; also prepares interface for userspace WG. */
+public final class RemoteAccessVpnService extends VpnService {
+    private static final String TAG = "RemoteAccessVPN";
+    public static final String ACTION_UP = "com.foxx.androidcast.remoteaccess.VPN_UP";
+    public static final String ACTION_DOWN = "com.foxx.androidcast.remoteaccess.VPN_DOWN";
+    public static final String EXTRA_WG_CONFIG = "wg_config";
+
+    private static final int NOTIF_ID = 0x7a01;
+    private static final String CHANNEL_ID = "remote_access_vpn";
+
+    private ParcelFileDescriptor tun;
+
+    public static boolean startWithConfig(Context context, String wgConfig) {
+        Intent prep = VpnService.prepare(context);
+        if (prep != null) {
+            Log.w(TAG, "VPN permission not granted");
+            return false;
+        }
+        Intent i = new Intent(context, RemoteAccessVpnService.class);
+        i.setAction(ACTION_UP);
+        i.putExtra(EXTRA_WG_CONFIG, wgConfig);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            context.startForegroundService(i);
+        } else {
+            context.startService(i);
+        }
+        return true;
+    }
+
+    public static void stop(Context context) {
+        Intent i = new Intent(context, RemoteAccessVpnService.class);
+        i.setAction(ACTION_DOWN);
+        context.startService(i);
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        String action = intent != null ? intent.getAction() : null;
+        if (ACTION_DOWN.equals(action)) {
+            tearDown();
+            stopForeground(true);
+            stopSelf();
+            return START_NOT_STICKY;
+        }
+        if (ACTION_UP.equals(action)) {
+            String cfg = intent.getStringExtra(EXTRA_WG_CONFIG);
+            ensureChannel();
+            startForeground(NOTIF_ID, buildNotification("WireGuard remote access"));
+            establishTun(cfg);
+            return START_STICKY;
+        }
+        return START_NOT_STICKY;
+    }
+
+    private void establishTun(String wgConfig) {
+        tearDown();
+        try {
+            String address = parseAddress(wgConfig);
+            Builder b = new Builder();
+            b.setSession("AndroidCast RA");
+            if (address != null) {
+                String[] parts = address.split("/");
+                b.addAddress(InetAddress.getByName(parts[0]),
+                        parts.length > 1 ? Integer.parseInt(parts[1]) : 32);
+            } else {
+                b.addAddress("10.66.66.2", 32);
+            }
+            b.addRoute("10.66.66.0", 24);
+            b.setMtu(1280);
+            tun = b.establish();
+            Log.i(TAG, "VPN interface established");
+        } catch (Exception e) {
+            Log.e(TAG, "VPN establish failed", e);
+        }
+    }
+
+    private static String parseAddress(String wgConfig) {
+        if (wgConfig == null) {
+            return null;
+        }
+        Matcher m = Pattern.compile("(?m)^Address\\s*=\\s*(.+)$").matcher(wgConfig);
+        return m.find() ? m.group(1).trim() : null;
+    }
+
+    private void tearDown() {
+        if (tun != null) {
+            try {
+                tun.close();
+            } catch (Exception ignored) {
+            }
+            tun = null;
+        }
+    }
+
+    private Notification buildNotification(String text) {
+        Intent open = new Intent(this, DeveloperSettingsActivity.class);
+        PendingIntent pi = PendingIntent.getActivity(this, 0, open,
+                PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
+        return new NotificationCompat.Builder(this, CHANNEL_ID)
+                .setSmallIcon(R.drawable.ic_notification)
+                .setContentTitle(getString(R.string.dev_remote_access_notification_title))
+                .setContentText(text)
+                .setContentIntent(pi)
+                .setOngoing(true)
+                .build();
+    }
+
+    private void ensureChannel() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
+            return;
+        }
+        NotificationManager nm = getSystemService(NotificationManager.class);
+        if (nm == null) {
+            return;
+        }
+        NotificationChannel ch = new NotificationChannel(CHANNEL_ID,
+                getString(R.string.dev_remote_access_notification_channel),
+                NotificationManager.IMPORTANCE_LOW);
+        nm.createNotificationChannel(ch);
+    }
+
+    @Override
+    public void onDestroy() {
+        tearDown();
+        super.onDestroy();
+    }
+}
--- a/app/src/main/java/com/foxx/androidcast/remoteaccess/WireGuardConfigBuilder.java
+++ b/app/src/main/java/com/foxx/androidcast/remoteaccess/WireGuardConfigBuilder.java
@@ -0,0 +1,40 @@
+package com.foxx.androidcast.remoteaccess;
+
+import android.util.Log;
+
+import org.json.JSONObject;
+
+/** Build wireguard-quick style config from BE connect credentials. */
+public final class WireGuardConfigBuilder {
+    private static final String TAG = "WireGuardCfg";
+
+    private WireGuardConfigBuilder() {}
+
+    public static String fromConnectCredentials(JSONObject credentials) {
+        if (credentials == null) {
+            return "";
+        }
+        String priv = credentials.optString("interface_private_key", "");
+        String addr = credentials.optString("interface_address", "10.66.66.2/32");
+        String peerPub = credentials.optString("peer_public_key", "");
+        String endpoint = credentials.optString("peer_endpoint", "");
+        String allowed = credentials.optString("peer_allowed_ips", "0.0.0.0/0");
+        if (priv.isEmpty() || peerPub.isEmpty()) {
+            Log.w(TAG, "missing wg keys in credentials");
+            return "";
+        }
+        StringBuilder sb = new StringBuilder();
+        sb.append("[Interface]\n");
+        sb.append("PrivateKey = ").append(priv).append('\n');
+        sb.append("Address = ").append(addr).append('\n');
+        sb.append('\n');
+        sb.append("[Peer]\n");
+        sb.append("PublicKey = ").append(peerPub).append('\n');
+        if (!endpoint.isEmpty()) {
+            sb.append("Endpoint = ").append(endpoint).append('\n');
+        }
+        sb.append("AllowedIPs = ").append(allowed).append('\n');
+        sb.append("PersistentKeepalive = 25\n");
+        return sb.toString();
+    }
+}
--- a/app/src/main/java/com/foxx/androidcast/remoteaccess/WireGuardTunnelBridge.java
+++ b/app/src/main/java/com/foxx/androidcast/remoteaccess/WireGuardTunnelBridge.java
@@ -0,0 +1,64 @@
+package com.foxx.androidcast.remoteaccess;
+
+import android.content.Context;
+import android.util.Log;
+
+/**
+ * Optional integration with wireguard-android tunnel module (third-party/wireguard-android).
+ * Falls back to {@link RemoteAccessVpnService} TUN setup when module is absent.
+ */
+public final class WireGuardTunnelBridge {
+    private static final String TAG = "WGTunnelBridge";
+
+    private WireGuardTunnelBridge() {}
+
+    public static boolean applyConfig(Context context, String wgQuickConfig) {
+        if (wgQuickConfig == null || wgQuickConfig.trim().isEmpty()) {
+            return false;
+        }
+        try {
+            Class<?> configClass = Class.forName("com.wireguard.config.Config");
+            Object config = configClass.getMethod("parse", String.class).invoke(null, wgQuickConfig);
+            Class<?> goBackendClass = Class.forName("com.wireguard.android.backend.GoBackend");
+            Object backend = goBackendClass.getConstructor(Context.class).newInstance(context);
+            Class<?> tunnelClass = Class.forName("com.wireguard.android.backend.Tunnel");
+            Object tunnel = proxyTunnel(tunnelClass);
+            Class<?> stateClass = Class.forName("com.wireguard.android.backend.Tunnel$State");
+            Object up = enumConstant(stateClass, "UP");
+            goBackendClass.getMethod("setState", tunnelClass, stateClass, configClass)
+                    .invoke(backend, tunnel, up, config);
+            Log.i(TAG, "wireguard tunnel UP via GoBackend");
+            return true;
+        } catch (Throwable t) {
+            Log.i(TAG, "GoBackend unavailable, using VpnService fallback: " + t.getClass().getSimpleName());
+            return RemoteAccessVpnService.startWithConfig(context, wgQuickConfig);
+        }
+    }
+
+    public static void tearDown(Context context) {
+        RemoteAccessVpnService.stop(context);
+        try {
+            Class<?> goBackendClass = Class.forName("com.wireguard.android.backend.GoBackend");
+            Object backend = goBackendClass.getConstructor(Context.class).newInstance(context);
+            Class<?> tunnelClass = Class.forName("com.wireguard.android.backend.Tunnel");
+            Object tunnel = proxyTunnel(tunnelClass);
+            Class<?> stateClass = Class.forName("com.wireguard.android.backend.Tunnel$State");
+            Object down = enumConstant(stateClass, "DOWN");
+            goBackendClass.getMethod("setState", tunnelClass, stateClass, Class.forName("com.wireguard.config.Config"))
+                    .invoke(backend, tunnel, down, null);
+        } catch (Throwable ignored) {
+        }
+    }
+
+    private static Object proxyTunnel(Class<?> tunnelClass) {
+        return java.lang.reflect.Proxy.newProxyInstance(
+                tunnelClass.getClassLoader(),
+                new Class<?>[]{tunnelClass},
+                (proxy, method, args) -> "getName".equals(method.getName()) ? "androidcast-ra" : null);
+    }
+
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    private static Object enumConstant(Class<?> stateClass, String name) {
+        return Enum.valueOf((Class<? extends Enum>) stateClass, name);
+    }
+}
--- a/app/src/main/res/layout/activity_dev_settings_panel.xml
+++ b/app/src/main/res/layout/activity_dev_settings_panel.xml
@@ -51,6 +51,26 @@
            android:text="@string/dev_backend_ntp_sync_hint"
            android:textSize="12sp" />

+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/dev_remote_access_mode"
+            android:textSize="14sp" />
+
+        <Spinner
+            android:id="@+id/spinner_dev_remote_access_mode"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="4dp" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="4dp"
+            android:text="@string/dev_remote_access_hint"
+            android:textSize="12sp" />
+
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -261,6 +261,17 @@
    <string name="dev_diag_ping_hint">Requires both peers on a build that supports MSG_DIAG_PING. Old peers ignore unknown packets.</string>
    <string name="dev_backend_ntp_sync_enable">Enable backend NTP sync</string>
    <string name="dev_backend_ntp_sync_hint">Disabled by default. Allows self-test/backend heartbeat to fetch server time correction without changing system clock.</string>
+    <string name="dev_remote_access_mode">Remote access (on-demand debug)</string>
+    <string name="dev_remote_access_disabled">Disabled</string>
+    <string name="dev_remote_access_wireguard">WireGuard</string>
+    <string name="dev_remote_access_rssh_unavailable">RSSH (reverse SSH — not available yet)</string>
+    <string name="dev_remote_access_hint">When enabled, device polls BE every 1–7 min (type: ra). Disabled sends teardown + BE notification. RSSH is reserved for a future release.</string>
+    <string name="dev_remote_access_rssh_toast">Reverse SSH (RSSH) is not implemented yet.</string>
+    <string name="dev_remote_access_applied">Remote access: %1$s</string>
+    <string name="dev_remote_access_vpn_denied">VPN permission required for WireGuard remote access.</string>
+    <string name="dev_remote_access_notification_channel">Remote access</string>
+    <string name="dev_remote_access_notification_title">Remote debug active</string>
+    <string name="dev_remote_access_notification_poll">Polling BE (%1$s)</string>
    <string name="dev_tab_network_self_test">Network self-test</string>
    <string name="dev_network_selftest_unlocked">Network self-test tab unlocked</string>
    <string name="dev_network_selftest_intro">Hidden diagnostics tab. Long-press the tabs row to unlock. Runs quick network checks: connectivity, captive portal, CIDR/DNS/MTU, peer reachability, backend RTT/throughput, NAT and NTP correction.</string>
--- a/app/src/test/java/com/foxx/androidcast/remoteaccess/RemoteAccessModeTest.java
+++ b/app/src/test/java/com/foxx/androidcast/remoteaccess/RemoteAccessModeTest.java
@@ -0,0 +1,37 @@
+package com.foxx.androidcast.remoteaccess;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class RemoteAccessModeTest {
+
+    @Test
+    public void fromStored_noneAlias() {
+        assertEquals(RemoteAccessMode.DISABLED, RemoteAccessMode.fromStored("none"));
+    }
+
+    @Test
+    public void fromStored_wireguard() {
+        assertEquals(RemoteAccessMode.WIREGUARD, RemoteAccessMode.fromStored("WIREGUARD"));
+    }
+
+    @Test
+    public void toApiValue_wireguard() {
+        assertEquals("wireguard", RemoteAccessMode.WIREGUARD.toApiValue());
+    }
+
+    @Test
+    public void toApiValue_disabled() {
+        assertEquals("none", RemoteAccessMode.DISABLED.toApiValue());
+    }
+
+    @Test
+    public void isActive_onlyWireGuard() {
+        assertFalse(RemoteAccessMode.DISABLED.isActive());
+        assertTrue(RemoteAccessMode.WIREGUARD.isActive());
+        assertFalse(RemoteAccessMode.RSSH.isActive());
+    }
+}
--- a/app/src/test/java/com/foxx/androidcast/remoteaccess/WireGuardConfigBuilderTest.java
+++ b/app/src/test/java/com/foxx/androidcast/remoteaccess/WireGuardConfigBuilderTest.java
@@ -0,0 +1,32 @@
+package com.foxx.androidcast.remoteaccess;
+
+import org.json.JSONObject;
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class WireGuardConfigBuilderTest {
+
+    @Test
+    public void buildsConfigFromCredentials() throws Exception {
+        JSONObject creds = new JSONObject();
+        creds.put("interface_private_key", "aPrivKey=");
+        creds.put("interface_address", "10.66.66.5/32");
+        creds.put("peer_public_key", "aPubKey=");
+        creds.put("peer_endpoint", "example.org:51820");
+        creds.put("peer_allowed_ips", "10.66.66.1/32");
+        String cfg = WireGuardConfigBuilder.fromConnectCredentials(creds);
+        assertTrue(cfg.contains("[Interface]"));
+        assertTrue(cfg.contains("PrivateKey = aPrivKey="));
+        assertTrue(cfg.contains("PublicKey = aPubKey="));
+        assertTrue(cfg.contains("Endpoint = example.org:51820"));
+    }
+
+    @Test
+    public void emptyWhenMissingKeys() throws Exception {
+        JSONObject creds = new JSONObject();
+        creds.put("interface_address", "10.66.66.5/32");
+        assertTrue(WireGuardConfigBuilder.fromConnectCredentials(creds).isEmpty());
+    }
+}
--- a/docs/20260602_REVERSE_SSH_proposals_summary.md
+++ b/docs/20260602_REVERSE_SSH_proposals_summary.md
@@ -4,6 +4,8 @@ _Date: 2026-06-02 — **merged document**: initial proposal (rev. 1) + infra rev

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/ALPHA.md
+++ b/docs/ALPHA.md
@@ -8,6 +8,8 @@ Last updated: 2026-05-23. Use this document for **feature freeze**, **alpha buil

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/ALPHA_SOAK.md
+++ b/docs/ALPHA_SOAK.md
@@ -4,6 +4,8 @@ Manual QA on **two devices** on the same Wi‑Fi. Goal: stable show path without

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/AV_QUALITY_QA_SESSION.md
+++ b/docs/AV_QUALITY_QA_SESSION.md
@@ -9,6 +9,8 @@ Research and recommendations for **movie cast** vs **video cast** quality enhanc

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/BUILD_DEPLOY.md
+++ b/docs/BUILD_DEPLOY.md
@@ -2,6 +2,8 @@

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/COMMERCIAL.md
+++ b/docs/COMMERCIAL.md
@@ -4,6 +4,8 @@ Ads, in-app purchases, and Play Store helpers are **disabled for normal users**.

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/CRASH_REPORTER.md
+++ b/docs/CRASH_REPORTER.md
@@ -2,6 +2,8 @@

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/GIT_FLOW.md
+++ b/docs/GIT_FLOW.md
@@ -15,6 +15,8 @@ This document defines how we develop, integrate, release, and hotfix. **Cursor a

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/GRAFANA_vs_others_graphvis_pivot.md
+++ b/docs/GRAFANA_vs_others_graphvis_pivot.md
@@ -4,6 +4,8 @@ _Date: 2026-06-02_

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/INFRA.md
+++ b/docs/INFRA.md
@@ -15,6 +15,8 @@

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/OPEN_API.md
+++ b/docs/OPEN_API.md
@@ -4,6 +4,8 @@ Triage **real device crashes** vs **synthetic / bulk test traffic** when exposin

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/OTA.md
+++ b/docs/OTA.md
@@ -8,6 +8,8 @@ MQTT is fully supported for OTA sources using retained topic payloads (`mqtt://.

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/PRO_AAR.md
+++ b/docs/PRO_AAR.md
@@ -4,6 +4,8 @@ Design notes for a commercial build without forking the cast protocol. **Not imp

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/README.md
+++ b/docs/README.md
@@ -37,6 +37,7 @@ Click a link to open a guide. Section links jump within the document (GitHub, Cu
 | [OPEN_API.md](OPEN_API.md) | Crash ingest API design, triage tags, heuristics. |
 | [OTA.md](OTA.md) | OTA channel layout v0, manifests, MQTT, publish flow. |
 | [PRO_AAR.md](PRO_AAR.md) | cast-core / cast-pro AAR split and Play Billing. |
+| [REMOTE_ACCESS_IMPL.md](REMOTE_ACCESS_IMPL.md) |  |
 | [ROADMAP.md](ROADMAP.md) | Implementation roadmap, alpha definition, deferred work. |
 | [TICKETS_ROADMAP.md](TICKETS_ROADMAP.md) | Tickets console, Gitea, attachments, agent queue. |
 | [USB_HDMI_CAST.md](USB_HDMI_CAST.md) | Roadmap D/E: HDMI awareness, USB-tether transport. |
--- a/docs/REMOTE_ACCESS_IMPL.md
+++ b/docs/REMOTE_ACCESS_IMPL.md
@@ -0,0 +1,47 @@
+# Remote access — implementation notes (v1 WireGuard)
+
+See the full proposal: [20260602_REVERSE_SSH_proposals_summary.md](20260602_REVERSE_SSH_proposals_summary.md).
+
+## Table of contents
+
+<!-- toc -->
+- [App (developer settings)](#app-developer-settings)
+- [BE](#be)
+- [WireGuard third-party](#wireguard-third-party)
+- [Tests](#tests)
+<!-- /toc -->
+
+**Documentation index:** [README.md](README.md)
+
+---
+
+## App (developer settings)
+
+- Dropdown: **Disabled** | **WireGuard** | **RSSH (greyed — not selectable)**
+- Pref key: `dev_remote_access_mode` (`AppPreferences`)
+- **Disabled:** stops `RemoteAccessService`, tears down VPN, POST `type:ra` + `status:disable`
+- **WireGuard:** foreground poll 1–7 min → `RemoteAccessService` → BE `heartbeat.php`
+
+## BE
+
+- Migration: `sql/migrations/007_remote_access.sql`
+- Repository: `src/RemoteAccessRepository.php`
+- Device API: `public/api/heartbeat.php` (`type: ra`)
+- Admin API: `public/api/remote_access.php`
+- UI: `?view=remote_access` (nav + hub card)
+- RBAC: `remote_access_view`, `remote_access_operate`, `remote_access_admin`
+
+## WireGuard third-party
+
+```bash
+bash scripts/init-wireguard-submodule.sh
+```
+
+Optional `:tunnel` module from `third-party/wireguard-android`. Without it, `WireGuardTunnelBridge` uses `RemoteAccessVpnService` (TUN fallback).
+
+## Tests
+
+```bash
+./gradlew :app:testDebugUnitTest
+bash examples/crash_reporter/backend/scripts/test_remote_access_api.sh
+```
--- a/docs/ROADMAP.md
+++ b/docs/ROADMAP.md
@@ -6,6 +6,8 @@ Last updated: 2026-05-23. Living document — refine as alpha and commercial tra

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/TICKETS_ROADMAP.md
+++ b/docs/TICKETS_ROADMAP.md
@@ -2,6 +2,8 @@

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/docs/USB_HDMI_CAST.md
+++ b/docs/USB_HDMI_CAST.md
@@ -4,6 +4,8 @@ Android Cast streams over **Wi‑Fi** (UDP/TCP/QUIC). USB-C→HDMI adapters use

 ---

+---
+
 ## Table of contents

 <!-- toc -->
--- a/examples/app_hub/index.php
+++ b/examples/app_hub/index.php
@@ -110,6 +110,12 @@ require_once dirname(__DIR__) . '/platform/footer.php';
      </span>
      <span class="hub-card-label">AndroidCast graphs</span>
    </a>
+    <a class="hub-card card card--lift" href="crashes/?view=remote_access">
+      <span class="hub-card-icon" aria-hidden="true">
+        <span class="nav-icon nav-icon--reports"></span>
+      </span>
+      <span class="hub-card-label">Remote access</span>
+    </a>
    <a class="hub-card card card--lift" href="build/">
      <span class="hub-card-icon" aria-hidden="true">
        <span class="nav-icon nav-icon--builder"></span>
--- a/examples/crash_reporter/backend/public/api/heartbeat.php
+++ b/examples/crash_reporter/backend/public/api/heartbeat.php
@@ -26,6 +26,7 @@ if (!is_array($heartbeat)) {
 $type = (string)($heartbeat['type'] ?? 'generic');
 $srvEpoch = time();
 $srvTz = date('O');
+$clientIp = (string)($_SERVER['HTTP_X_FORWARDED_FOR'] ?? ($_SERVER['REMOTE_ADDR'] ?? ''));

 $resp = [
    'heartbeat' => [
@@ -52,7 +53,13 @@ if ($type === 'ntp') {
 }

 if ($type === 'ip') {
-    $resp['heartbeat']['external_ip'] = $_SERVER['HTTP_X_FORWARDED_FOR'] ?? ($_SERVER['REMOTE_ADDR'] ?? '');
+    $resp['heartbeat']['external_ip'] = $clientIp;
+}
+
+if ($type === 'ra') {
+    require_once __DIR__ . '/../../src/RemoteAccessRepository.php';
+    $ra = RemoteAccessRepository::handleDeviceHeartbeat($heartbeat, $clientIp);
+    $resp['heartbeat'] = array_merge($resp['heartbeat'], $ra);
 }

 echo json_encode($resp, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
--- a/examples/crash_reporter/backend/public/api/remote_access.php
+++ b/examples/crash_reporter/backend/public/api/remote_access.php
@@ -0,0 +1,105 @@
+<?php
+declare(strict_types=1);
+require_once __DIR__ . '/../../src/bootstrap.php';
+require_once __DIR__ . '/../../src/RemoteAccessRepository.php';
+
+header('Content-Type: application/json; charset=utf-8');
+
+Auth::check();
+
+function json_out(array $payload, int $code = 200): void {
+    http_response_code($code);
+    echo json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    exit;
+}
+
+if (!Rbac::can('remote_access_view')) {
+    json_out(['ok' => false, 'error' => 'forbidden'], 403);
+}
+
+$method = $_SERVER['REQUEST_METHOD'] ?? 'GET';
+$action = trim((string)($_GET['action'] ?? ''));
+
+if ($method === 'GET') {
+    if ($action === 'devices') {
+        json_out(['ok' => true, 'devices' => RemoteAccessRepository::listDevices()]);
+    }
+    if ($action === 'sessions') {
+        $filter = trim((string)($_GET['status'] ?? ''));
+        json_out(['ok' => true, 'sessions' => RemoteAccessRepository::listSessions($filter)]);
+    }
+    if ($action === 'events') {
+        json_out(['ok' => true, 'events' => RemoteAccessRepository::listEvents((int)($_GET['limit'] ?? 100))]);
+    }
+    if ($action === 'dashboard') {
+        $sessions = RemoteAccessRepository::listSessions('');
+        $active = array_values(array_filter($sessions, static fn($s) => in_array($s['status'] ?? '', ['pending', 'active'], true)));
+        $inactive = array_values(array_filter($sessions, static fn($s) => !in_array($s['status'] ?? '', ['pending', 'active'], true)));
+        json_out([
+            'ok' => true,
+            'devices' => RemoteAccessRepository::listDevices(),
+            'active_sessions' => $active,
+            'inactive_sessions' => array_slice($inactive, 0, 50),
+            'recent_events' => RemoteAccessRepository::listEvents(30),
+        ]);
+    }
+    json_out(['ok' => false, 'error' => 'unknown_action'], 400);
+}
+
+if ($method !== 'POST') {
+    json_out(['ok' => false, 'error' => 'method_not_allowed'], 405);
+}
+
+$raw = file_get_contents('php://input') ?: '';
+$body = json_decode($raw, true);
+if (!is_array($body)) {
+    json_out(['ok' => false, 'error' => 'invalid_json'], 400);
+}
+
+$user = Auth::user();
+$userId = (int)($user['id'] ?? 0);
+
+if ($action === 'whitelist') {
+    if (!Rbac::can('remote_access_admin')) {
+        json_out(['ok' => false, 'error' => 'forbidden'], 403);
+    }
+    $deviceId = trim((string)($body['device_id'] ?? ''));
+    if ($deviceId === '') {
+        json_out(['ok' => false, 'error' => 'missing_device_id'], 400);
+    }
+    RemoteAccessRepository::setDeviceWhitelist($deviceId, !empty($body['whitelisted']), $body['notes'] ?? null);
+    RemoteAccessRepository::logEvent($deviceId, null, $userId, 'whitelist_update', null, [
+        'whitelisted' => !empty($body['whitelisted']),
+    ], '');
+    json_out(['ok' => true]);
+}
+
+if ($action === 'open_session') {
+    if (!Rbac::can('remote_access_operate')) {
+        json_out(['ok' => false, 'error' => 'forbidden'], 403);
+    }
+    $deviceId = trim((string)($body['device_id'] ?? ''));
+    if ($deviceId === '') {
+        json_out(['ok' => false, 'error' => 'missing_device_id'], 400);
+    }
+    $result = RemoteAccessRepository::openSession($deviceId, $userId);
+    if (empty($result['ok'])) {
+        json_out(['ok' => false, 'error' => $result['error'] ?? 'failed'], 400);
+    }
+    json_out(['ok' => true, 'session_id' => $result['session_id'] ?? '']);
+}
+
+if ($action === 'close_session') {
+    if (!Rbac::can('remote_access_operate')) {
+        json_out(['ok' => false, 'error' => 'forbidden'], 403);
+    }
+    $sessionId = trim((string)($body['session_id'] ?? ''));
+    if ($sessionId === '') {
+        json_out(['ok' => false, 'error' => 'missing_session_id'], 400);
+    }
+    RemoteAccessRepository::closeSession($sessionId, RemoteAccessRepository::STATUS_CLOSED, 'operator_closed');
+    RemoteAccessRepository::logEvent((string)($body['device_id'] ?? ''), $sessionId, $userId, 'session_close', 'operator', null, '');
+    json_out(['ok' => true]);
+}
+
+json_out(['ok' => false, 'error' => 'unknown_action'], 400);
--- a/examples/crash_reporter/backend/public/assets/js/remote_access.js
+++ b/examples/crash_reporter/backend/public/assets/js/remote_access.js
@@ -0,0 +1,193 @@
+(function () {
+  function basePath() {
+    return document.body.getAttribute('data-base-path') || '';
+  }
+
+  function apiUrl(action, params) {
+    const q = new URLSearchParams(params || {});
+    q.set('action', action);
+    return basePath() + '/api/remote_access.php?' + q.toString();
+  }
+
+  function setStatus(msg, isError) {
+    const el = document.getElementById('ra-status');
+    if (!el) return;
+    el.textContent = msg;
+    el.classList.toggle('error', !!isError);
+  }
+
+  async function fetchJson(url, opts) {
+    const res = await fetch(url, Object.assign({ credentials: 'same-origin' }, opts || {}));
+    const data = await res.json().catch(() => ({}));
+    if (!res.ok || data.ok === false) {
+      throw new Error(data.error || ('HTTP ' + res.status));
+    }
+    return data;
+  }
+
+  function esc(s) {
+    const d = document.createElement('div');
+    d.textContent = s == null ? '' : String(s);
+    return d.innerHTML;
+  }
+
+  function renderDevices(devices) {
+    const tbody = document.getElementById('ra-devices-tbody');
+    if (!tbody) return;
+    tbody.innerHTML = '';
+    (devices || []).forEach((d) => {
+      const tr = document.createElement('tr');
+      const wl = Number(d.whitelisted) === 1;
+      tr.innerHTML =
+        '<td><code>' + esc(d.device_id) + '</code></td>' +
+        '<td>' + esc(d.opt_in_mode || 'none') + '</td>' +
+        '<td>' + (wl ? 'yes' : 'no') + '</td>' +
+        '<td>' + esc(d.last_seen_at || '—') + '</td>' +
+        '<td>' + esc(d.app_version || '—') + '</td>' +
+        '<td>' +
+        '<button type="button" class="btn btn-sm" data-open-session="' + esc(d.device_id) + '">Open session</button> ' +
+        '<button type="button" class="btn btn-sm" data-toggle-wl="' + esc(d.device_id) + '" data-wl="' + (wl ? '0' : '1') + '">' +
+        (wl ? 'Revoke WL' : 'Whitelist') + '</button>' +
+        '</td>';
+      tbody.appendChild(tr);
+    });
+  }
+
+  function renderSessions(active, inactive) {
+    const aBody = document.getElementById('ra-active-tbody');
+    const iBody = document.getElementById('ra-inactive-tbody');
+    if (aBody) {
+      aBody.innerHTML = '';
+      (active || []).forEach((s) => {
+        const tr = document.createElement('tr');
+        tr.innerHTML =
+          '<td><code>' + esc(s.session_id) + '</code></td>' +
+          '<td><code>' + esc(s.device_id) + '</code></td>' +
+          '<td>' + esc(s.status) + '</td>' +
+          '<td>' + esc(s.tunnel) + '</td>' +
+          '<td>' + esc(s.endpoint || '—') + '</td>' +
+          '<td><button type="button" class="btn btn-sm" data-close-session="' + esc(s.session_id) + '" data-device="' + esc(s.device_id) + '">Close</button></td>';
+        aBody.appendChild(tr);
+      });
+    }
+    if (iBody) {
+      iBody.innerHTML = '';
+      (inactive || []).forEach((s) => {
+        const tr = document.createElement('tr');
+        tr.innerHTML =
+          '<td><code>' + esc(s.session_id) + '</code></td>' +
+          '<td><code>' + esc(s.device_id) + '</code></td>' +
+          '<td>' + esc(s.status) + '</td>' +
+          '<td>' + esc(s.closed_at || '—') + '</td>' +
+          '<td>' + esc(s.close_reason || '—') + '</td>';
+        iBody.appendChild(tr);
+      });
+    }
+  }
+
+  function renderEvents(events) {
+    const tbody = document.getElementById('ra-events-tbody');
+    if (!tbody) return;
+    tbody.innerHTML = '';
+    (events || []).forEach((e) => {
+      const tr = document.createElement('tr');
+      tr.innerHTML =
+        '<td>' + esc(e.created_at) + '</td>' +
+        '<td><code>' + esc(e.device_id) + '</code></td>' +
+        '<td>' + esc(e.action) + '</td>' +
+        '<td>' + esc(e.reason || '—') + '</td>';
+      tbody.appendChild(tr);
+    });
+  }
+
+  async function refresh() {
+    setStatus('Loading…');
+    try {
+      const data = await fetchJson(apiUrl('dashboard'));
+      renderDevices(data.devices);
+      renderSessions(data.active_sessions, data.inactive_sessions);
+      renderEvents(data.recent_events);
+      setStatus('Updated ' + new Date().toLocaleTimeString());
+    } catch (e) {
+      setStatus('Failed: ' + e.message, true);
+    }
+  }
+
+  document.addEventListener('click', async (ev) => {
+    const t = ev.target;
+    if (!(t instanceof HTMLElement)) return;
+    const openId = t.getAttribute('data-open-session');
+    if (openId) {
+      try {
+        await fetchJson(apiUrl('open_session'), {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ device_id: openId }),
+        });
+        await refresh();
+      } catch (e) {
+        setStatus('Open session: ' + e.message, true);
+      }
+      return;
+    }
+    const closeId = t.getAttribute('data-close-session');
+    if (closeId) {
+      try {
+        await fetchJson(apiUrl('close_session'), {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({
+            session_id: closeId,
+            device_id: t.getAttribute('data-device') || '',
+          }),
+        });
+        await refresh();
+      } catch (e) {
+        setStatus('Close session: ' + e.message, true);
+      }
+      return;
+    }
+    const wlDevice = t.getAttribute('data-toggle-wl');
+    if (wlDevice) {
+      try {
+        await fetchJson(apiUrl('whitelist'), {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({
+            device_id: wlDevice,
+            whitelisted: t.getAttribute('data-wl') === '1',
+          }),
+        });
+        await refresh();
+      } catch (e) {
+        setStatus('Whitelist: ' + e.message, true);
+      }
+    }
+  });
+
+  const form = document.getElementById('ra-whitelist-form');
+  if (form) {
+    form.addEventListener('submit', async (ev) => {
+      ev.preventDefault();
+      const fd = new FormData(form);
+      try {
+        await fetchJson(apiUrl('whitelist'), {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({
+            device_id: fd.get('device_id'),
+            notes: fd.get('notes'),
+            whitelisted: true,
+          }),
+        });
+        form.reset();
+        await refresh();
+      } catch (e) {
+        setStatus('Whitelist add: ' + e.message, true);
+      }
+    });
+  }
+
+  refresh();
+  setInterval(refresh, 60000);
+})();
--- a/examples/crash_reporter/backend/public/index.php
+++ b/examples/crash_reporter/backend/public/index.php
@@ -95,6 +95,11 @@ if ($route === '/api/graph_upload.php' || str_ends_with($route, '/api/graph_uplo
    exit;
 }

+if ($route === '/api/remote_access.php' || str_ends_with($route, '/api/remote_access.php')) {
+    require __DIR__ . '/api/remote_access.php';
+    exit;
+}
+
 if ($route === '/api/ticket_attachment.php' || str_ends_with($route, '/api/ticket_attachment.php')) {
    require __DIR__ . '/api/ticket_attachment.php';
    exit;
@@ -197,6 +202,7 @@ $pageTitle = match ($view) {
    'home' => 'Home',
    'tickets' => 'Tickets',
    'graphs' => 'Graphs',
+    'remote_access' => 'Remote access',
    'reports', 'report' => 'Crash reports',
    default => 'Console',
 };
--- a/examples/crash_reporter/backend/scripts/test_remote_access_api.sh
+++ b/examples/crash_reporter/backend/scripts/test_remote_access_api.sh
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+# Smoke test remote access API (SQLite dev or deployed BE).
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+BASE="${CRASHES_BASE:-http://127.0.0.1:8080/app/androidcast_project/crashes}"
+DEVICE_ID="test-ra-device-$(date +%s)"
+COOKIE_JAR="$(mktemp)"
+trap 'rm -f "$COOKIE_JAR"' EXIT
+
+login() {
+  curl -sf -c "$COOKIE_JAR" -b "$COOKIE_JAR" -X POST \
+    -d "username=${ADMIN_USER:-admin}&password=${ADMIN_PASS:-admin}" \
+    "$BASE/login" >/dev/null
+}
+
+echo "== heartbeat ra disable =="
+curl -sf -X POST -H 'Content-Type: application/json' \
+  -d "{\"heartbeat\":{\"type\":\"ra\",\"status\":\"disable\",\"device_id\":\"$DEVICE_ID\",\"random\":\"r1\"}}" \
+  "$BASE/api/heartbeat.php" | grep -q '"action":"disabled"' && echo OK
+
+echo "== heartbeat ra enable (not whitelisted → wait) =="
+curl -sf -X POST -H 'Content-Type: application/json' \
+  -d "{\"heartbeat\":{\"type\":\"ra\",\"status\":\"enable\",\"device_id\":\"$DEVICE_ID\",\"random\":\"r2\",\"capabilities\":[\"wireguard\"],\"tunnel_mode\":\"wireguard\"}}" \
+  "$BASE/api/heartbeat.php" | grep -q '"action":"wait"' && echo OK
+
+login
+echo "== whitelist device =="
+curl -sf -b "$COOKIE_JAR" -X POST -H 'Content-Type: application/json' \
+  -d "{\"device_id\":\"$DEVICE_ID\",\"whitelisted\":true}" \
+  "$BASE/api/remote_access.php?action=whitelist" | grep -q '"ok":true' && echo OK
+
+echo "== poll enable (whitelisted, no session → wait) =="
+curl -sf -X POST -H 'Content-Type: application/json' \
+  -d "{\"heartbeat\":{\"type\":\"ra\",\"status\":\"enable\",\"device_id\":\"$DEVICE_ID\",\"random\":\"r3\",\"capabilities\":[\"wireguard\"],\"tunnel_mode\":\"wireguard\"}}" \
+  "$BASE/api/heartbeat.php" | grep -q '"action":"wait"' && echo OK
+
+echo "== open session =="
+curl -sf -b "$COOKIE_JAR" -X POST -H 'Content-Type: application/json' \
+  -d "{\"device_id\":\"$DEVICE_ID\"}" \
+  "$BASE/api/remote_access.php?action=open_session" | grep -q '"ok":true' && echo OK
+
+echo "== poll → connect wireguard =="
+RESP="$(curl -sf -X POST -H 'Content-Type: application/json' \
+  -d "{\"heartbeat\":{\"type\":\"ra\",\"status\":\"enable\",\"device_id\":\"$DEVICE_ID\",\"random\":\"r4\",\"capabilities\":[\"wireguard\"],\"tunnel_mode\":\"wireguard\"}}" \
+  "$BASE/api/heartbeat.php")"
+echo "$RESP" | grep -q '"action":"connect"' && echo OK
+echo "$RESP" | grep -q 'interface_private_key' && echo OK credentials
+
+echo "== dashboard API =="
+curl -sf -b "$COOKIE_JAR" "$BASE/api/remote_access.php?action=dashboard" | grep -q '"ok":true' && echo OK
+
+echo "All remote access API checks passed."
--- a/examples/crash_reporter/backend/sql/migrations/007_remote_access.sql
+++ b/examples/crash_reporter/backend/sql/migrations/007_remote_access.sql
@@ -0,0 +1,56 @@
+-- Remote access control plane (WireGuard v1; reverse SSH reserved).
+-- MariaDB / production: mysql -u root -p androidcast_crashes < sql/migrations/007_remote_access.sql
+
+CREATE TABLE IF NOT EXISTS remote_access_devices (
+    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    device_id VARCHAR(128) NOT NULL,
+    company_id INT UNSIGNED NOT NULL DEFAULT 1,
+    whitelisted TINYINT(1) NOT NULL DEFAULT 0,
+    opt_in_mode ENUM('none','wireguard','rssh') NOT NULL DEFAULT 'none',
+    last_random VARCHAR(96) NULL,
+    app_version VARCHAR(64) NULL,
+    last_seen_at TIMESTAMP NULL,
+    notes TEXT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    UNIQUE KEY uq_ra_device (device_id),
+    KEY idx_ra_device_company (company_id),
+    KEY idx_ra_device_whitelist (whitelisted, opt_in_mode)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS remote_access_sessions (
+    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    session_id VARCHAR(36) NOT NULL,
+    device_id VARCHAR(128) NOT NULL,
+    company_id INT UNSIGNED NOT NULL DEFAULT 1,
+    operator_user_id INT UNSIGNED NULL,
+    status ENUM('pending','active','inactive','closed','closed_timeout') NOT NULL DEFAULT 'pending',
+    tunnel ENUM('wireguard','ssh_reverse') NOT NULL DEFAULT 'wireguard',
+    endpoint VARCHAR(255) NULL,
+    wg_client_private_key VARCHAR(64) NULL,
+    wg_client_address VARCHAR(64) NULL,
+    wg_server_public_key VARCHAR(64) NULL,
+    wg_peer_allowed_ips VARCHAR(255) NULL,
+    expires_at INT UNSIGNED NULL,
+    last_activity_at TIMESTAMP NULL,
+    close_reason VARCHAR(255) NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    closed_at TIMESTAMP NULL,
+    UNIQUE KEY uq_ra_session (session_id),
+    KEY idx_ra_sess_device (device_id, status),
+    KEY idx_ra_sess_status (status, last_activity_at)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS remote_access_events (
+    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    session_id VARCHAR(36) NULL,
+    device_id VARCHAR(128) NOT NULL,
+    actor_user_id INT UNSIGNED NULL,
+    action VARCHAR(64) NOT NULL,
+    reason VARCHAR(255) NULL,
+    meta_json LONGTEXT NULL,
+    client_ip VARCHAR(64) NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    KEY idx_ra_evt_device (device_id, created_at),
+    KEY idx_ra_evt_session (session_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
--- a/examples/crash_reporter/backend/sql/migrations/007_remote_access.sqlite.sql
+++ b/examples/crash_reporter/backend/sql/migrations/007_remote_access.sqlite.sql
@@ -0,0 +1,50 @@
+-- SQLite dev mirror for remote access tables.
+
+CREATE TABLE IF NOT EXISTS remote_access_devices (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    device_id TEXT NOT NULL UNIQUE,
+    company_id INTEGER NOT NULL DEFAULT 1,
+    whitelisted INTEGER NOT NULL DEFAULT 0,
+    opt_in_mode TEXT NOT NULL DEFAULT 'none',
+    last_random TEXT NULL,
+    app_version TEXT NULL,
+    last_seen_at TEXT NULL,
+    notes TEXT NULL,
+    created_at TEXT NOT NULL DEFAULT (datetime('now')),
+    updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE TABLE IF NOT EXISTS remote_access_sessions (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    session_id TEXT NOT NULL UNIQUE,
+    device_id TEXT NOT NULL,
+    company_id INTEGER NOT NULL DEFAULT 1,
+    operator_user_id INTEGER NULL,
+    status TEXT NOT NULL DEFAULT 'pending',
+    tunnel TEXT NOT NULL DEFAULT 'wireguard',
+    endpoint TEXT NULL,
+    wg_client_private_key TEXT NULL,
+    wg_client_address TEXT NULL,
+    wg_server_public_key TEXT NULL,
+    wg_peer_allowed_ips TEXT NULL,
+    expires_at INTEGER NULL,
+    last_activity_at TEXT NULL,
+    close_reason TEXT NULL,
+    created_at TEXT NOT NULL DEFAULT (datetime('now')),
+    closed_at TEXT NULL
+);
+
+CREATE TABLE IF NOT EXISTS remote_access_events (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    session_id TEXT NULL,
+    device_id TEXT NOT NULL,
+    actor_user_id INTEGER NULL,
+    action TEXT NOT NULL,
+    reason TEXT NULL,
+    meta_json TEXT NULL,
+    client_ip TEXT NULL,
+    created_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX IF NOT EXISTS idx_ra_evt_device ON remote_access_events(device_id, created_at);
+CREATE INDEX IF NOT EXISTS idx_ra_sess_device ON remote_access_sessions(device_id, status);
--- a/examples/crash_reporter/backend/src/Rbac.php
+++ b/examples/crash_reporter/backend/src/Rbac.php
@@ -30,6 +30,9 @@ final class Rbac {
            'manage_company_users',
            'manage_company_settings',
            'manage_self',
+            'remote_access_view',
+            'remote_access_operate',
+            'remote_access_admin',
        ],
        self::COMPANY_ADMIN => [
            'view_reports',
@@ -38,10 +41,14 @@ final class Rbac {
            'manage_devices',
            'manage_company_users',
            'manage_self',
+            'remote_access_view',
+            'remote_access_operate',
+            'remote_access_admin',
        ],
        self::COMPANY_MEMBER => [
            'view_reports',
            'manage_self',
+            'remote_access_view',
        ],
    ];

--- a/examples/crash_reporter/backend/src/RemoteAccessRepository.php
+++ b/examples/crash_reporter/backend/src/RemoteAccessRepository.php
@@ -0,0 +1,465 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * On-demand remote access control plane (heartbeat type: ra).
+ * v1: WireGuard opt-in from device; reverse SSH (RSSH) reserved for future use.
+ */
+final class RemoteAccessRepository {
+    public const OPT_NONE = 'none';
+    public const OPT_WIREGUARD = 'wireguard';
+    public const OPT_RSSH = 'rssh';
+
+    public const STATUS_PENDING = 'pending';
+    public const STATUS_ACTIVE = 'active';
+    public const STATUS_INACTIVE = 'inactive';
+    public const STATUS_CLOSED = 'closed';
+    public const STATUS_CLOSED_TIMEOUT = 'closed_timeout';
+
+    public static function ensureSchema(): void {
+        $pdo = Database::pdo();
+        if (Database::tableExists($pdo, 'remote_access_devices')) {
+            return;
+        }
+        self::createTables($pdo);
+    }
+
+    private static function createTables(PDO $pdo): void {
+        $path = Database::isMysql()
+            ? __DIR__ . '/../sql/migrations/007_remote_access.sql'
+            : __DIR__ . '/../sql/migrations/007_remote_access.sqlite.sql';
+        if (!is_readable($path)) {
+            throw new RuntimeException('remote access migration missing: ' . $path);
+        }
+        $sql = (string) file_get_contents($path);
+        foreach (array_filter(array_map('trim', explode(';', $sql))) as $stmt) {
+            if ($stmt !== '') {
+                $pdo->exec($stmt);
+            }
+        }
+    }
+
+    /** @return array<string, mixed> heartbeat.ra response payload */
+    public static function handleDeviceHeartbeat(array $heartbeat, string $clientIp): array {
+        self::ensureSchema();
+        $deviceId = trim((string) ($heartbeat['device_id'] ?? ''));
+        if ($deviceId === '') {
+            return self::raEnvelope('deny', ['reason' => 'missing_device_id']);
+        }
+
+        $status = strtolower(trim((string) ($heartbeat['status'] ?? 'enable')));
+        $random = trim((string) ($heartbeat['random'] ?? ''));
+        $appVersion = trim((string) ($heartbeat['app_version'] ?? ''));
+        $capabilities = $heartbeat['capabilities'] ?? [];
+        if (!is_array($capabilities)) {
+            $capabilities = [];
+        }
+        $tunnelMode = self::inferTunnelMode($capabilities, $heartbeat);
+
+        if ($status === 'disable') {
+            return self::handleDisable($deviceId, $random, $clientIp, $appVersion);
+        }
+
+        self::upsertDevicePoll($deviceId, $random, $appVersion, $tunnelMode, $clientIp);
+
+        $device = self::findDevice($deviceId);
+        if (!$device || !(int) ($device['whitelisted'] ?? 0)) {
+            self::logEvent($deviceId, null, null, 'poll_wait', 'not_whitelisted', [
+                'opt_in' => $tunnelMode,
+            ], $clientIp);
+            return self::raEnvelope('wait', ['reason' => 'not_whitelisted']);
+        }
+
+        if ($tunnelMode === self::OPT_NONE) {
+            return self::raEnvelope('wait', ['reason' => 'opt_in_none']);
+        }
+
+        if ($tunnelMode === self::OPT_RSSH) {
+            return self::raEnvelope('deny', ['reason' => 'rssh_not_implemented']);
+        }
+
+        $session = self::findConnectableSession($deviceId, $random);
+        if ($session === null) {
+            self::logEvent($deviceId, null, null, 'poll_wait', 'no_pending_session', null, $clientIp);
+            return self::raEnvelope('wait', ['reason' => 'no_pending_session']);
+        }
+
+        return self::buildConnectResponse($session, $deviceId, $clientIp);
+    }
+
+    /** @param list<string> $capabilities */
+    private static function inferTunnelMode(array $capabilities, array $heartbeat): string {
+        foreach ($capabilities as $cap) {
+            $c = strtolower(trim((string) $cap));
+            if ($c === 'wireguard' || $c === 'wg') {
+                return self::OPT_WIREGUARD;
+            }
+            if ($c === 'ssh_reverse' || $c === 'rssh') {
+                return self::OPT_RSSH;
+            }
+        }
+        $mode = strtolower(trim((string) ($heartbeat['tunnel_mode'] ?? '')));
+        if (in_array($mode, [self::OPT_WIREGUARD, self::OPT_RSSH, self::OPT_NONE], true)) {
+            return $mode;
+        }
+        return self::OPT_WIREGUARD;
+    }
+
+    private static function handleDisable(string $deviceId, string $random, string $clientIp, string $appVersion): array {
+        $pdo = Database::pdo();
+        $now = self::nowSql();
+        $pdo->prepare(
+            'UPDATE remote_access_devices SET opt_in_mode = ?, last_random = ?, app_version = ?, last_seen_at = ?, updated_at = ? WHERE device_id = ?'
+        )->execute([self::OPT_NONE, $random, $appVersion, $now, $now, $deviceId]);
+
+        self::closeActiveSessionsForDevice($deviceId, 'user_disabled');
+        self::logEvent($deviceId, null, null, 'user_disable', 'device_opt_out', null, $clientIp);
+
+        return self::raEnvelope('disabled', ['reason' => 'user_opt_out']);
+    }
+
+    private static function upsertDevicePoll(
+        string $deviceId,
+        string $random,
+        string $appVersion,
+        string $tunnelMode,
+        string $clientIp
+    ): void {
+        $pdo = Database::pdo();
+        $now = self::nowSql();
+        $existing = self::findDevice($deviceId);
+        if ($existing) {
+            $pdo->prepare(
+                'UPDATE remote_access_devices SET opt_in_mode = ?, last_random = ?, app_version = ?, last_seen_at = ?, updated_at = ? WHERE device_id = ?'
+            )->execute([$tunnelMode, $random, $appVersion, $now, $now, $deviceId]);
+            return;
+        }
+        $pdo->prepare(
+            'INSERT INTO remote_access_devices (device_id, company_id, whitelisted, opt_in_mode, last_random, app_version, last_seen_at, created_at, updated_at)
+             VALUES (?, ?, 0, ?, ?, ?, ?, ?, ?)'
+        )->execute([
+            $deviceId,
+            Rbac::defaultCompanyId(),
+            $tunnelMode,
+            $random,
+            $appVersion,
+            $now,
+            $now,
+            $now,
+        ]);
+        self::logEvent($deviceId, null, null, 'device_seen', 'first_poll', ['opt_in' => $tunnelMode], $clientIp);
+    }
+
+    /** @return array<string, mixed>|null */
+    private static function findDevice(string $deviceId): ?array {
+        $st = Database::pdo()->prepare('SELECT * FROM remote_access_devices WHERE device_id = ? LIMIT 1');
+        $st->execute([$deviceId]);
+        $row = $st->fetch(PDO::FETCH_ASSOC);
+        return is_array($row) ? $row : null;
+    }
+
+    /** @return array<string, mixed>|null */
+    private static function findConnectableSession(string $deviceId, string $random): ?array {
+        $pdo = Database::pdo();
+        $st = $pdo->prepare(
+            "SELECT * FROM remote_access_sessions
+             WHERE device_id = ? AND status IN ('pending','active')
+             ORDER BY id DESC LIMIT 5"
+        );
+        $st->execute([$deviceId]);
+        $rows = $st->fetchAll(PDO::FETCH_ASSOC);
+        if (!is_array($rows)) {
+            return null;
+        }
+        foreach ($rows as $row) {
+            if (!is_array($row)) {
+                continue;
+            }
+            $exp = (int) ($row['expires_at'] ?? 0);
+            if ($exp > 0 && $exp < time()) {
+                self::closeSession((string) $row['session_id'], self::STATUS_CLOSED_TIMEOUT, 'expired');
+                continue;
+            }
+            return $row;
+        }
+        return null;
+    }
+
+    /** @param array<string, mixed> $session */
+    private static function buildConnectResponse(array $session, string $deviceId, string $clientIp): array {
+        $sessionId = (string) ($session['session_id'] ?? '');
+        $tunnel = (string) ($session['tunnel'] ?? 'wireguard');
+        if ($tunnel !== 'wireguard') {
+            return self::raEnvelope('deny', ['reason' => 'tunnel_not_supported', 'tunnel' => $tunnel]);
+        }
+
+        $keys = self::ensureSessionWireGuardKeys($sessionId, $session);
+        $endpoint = (string) ($session['endpoint'] ?? cfg('remote_access.wg_endpoint', 'ra.apps.f0xx.org:51820'));
+        $expiresAt = (int) ($session['expires_at'] ?? (time() + 3600));
+
+        self::markSessionActive($sessionId);
+        self::logEvent($deviceId, $sessionId, null, 'tunnel_connect', 'wireguard', null, $clientIp);
+
+        return self::raEnvelope('connect', [
+            'session_id' => $sessionId,
+            'endpoint' => $endpoint,
+            'tunnel' => 'wireguard',
+            'credentials' => [
+                'mode' => 'ephemeral_pubkey',
+                'interface_private_key' => $keys['client_private'],
+                'interface_address' => $keys['client_address'],
+                'peer_public_key' => $keys['server_public'],
+                'peer_endpoint' => $endpoint,
+                'peer_allowed_ips' => $keys['allowed_ips'],
+            ],
+            'expires_at' => $expiresAt,
+        ]);
+    }
+
+    /** @param array<string, mixed> $session @return array{client_private:string,client_address:string,server_public:string,allowed_ips:string} */
+    private static function ensureSessionWireGuardKeys(string $sessionId, array $session): array {
+        $priv = trim((string) ($session['wg_client_private_key'] ?? ''));
+        $addr = trim((string) ($session['wg_client_address'] ?? ''));
+        $pub = trim((string) ($session['wg_server_public_key'] ?? ''));
+        $allowed = trim((string) ($session['wg_peer_allowed_ips'] ?? ''));
+        if ($priv !== '' && $addr !== '' && $pub !== '') {
+            return [
+                'client_private' => $priv,
+                'client_address' => $addr,
+                'server_public' => $pub,
+                'allowed_ips' => $allowed !== '' ? $allowed : '10.66.66.1/32',
+            ];
+        }
+        $pair = self::generateWireGuardKeyPair();
+        $clientIp = self::allocateClientAddress($sessionId);
+        $serverPub = cfg('remote_access.wg_server_public_key', '');
+        if ($serverPub === '') {
+            $serverPair = self::generateWireGuardKeyPair();
+            $serverPub = $serverPair['public'];
+        }
+        $allowed = '10.66.66.1/32';
+        Database::pdo()->prepare(
+            'UPDATE remote_access_sessions SET wg_client_private_key = ?, wg_client_address = ?, wg_server_public_key = ?, wg_peer_allowed_ips = ? WHERE session_id = ?'
+        )->execute([$pair['private'], $clientIp, $serverPub, $allowed, $sessionId]);
+
+        return [
+            'client_private' => $pair['private'],
+            'client_address' => $clientIp,
+            'server_public' => $serverPub,
+            'allowed_ips' => $allowed,
+        ];
+    }
+
+    private static function allocateClientAddress(string $sessionId): string {
+        $n = abs(crc32($sessionId)) % 200 + 2;
+        return '10.66.66.' . $n . '/32';
+    }
+
+    /** @return array{private:string,public:string} */
+    public static function generateWireGuardKeyPair(): array {
+        $priv = trim((string) @shell_exec('wg genkey 2>/dev/null') ?: '');
+        if ($priv !== '') {
+            $pub = trim((string) @shell_exec('echo ' . escapeshellarg($priv) . ' | wg pubkey 2>/dev/null') ?: '');
+            if ($pub !== '') {
+                return ['private' => $priv, 'public' => $pub];
+            }
+        }
+        $raw = random_bytes(32);
+        $priv = rtrim(strtr(base64_encode($raw), '+/', '-_'), '=');
+        return ['private' => $priv, 'public' => 'dev-placeholder-pub-' . substr(hash('sha256', $priv), 0, 43)];
+    }
+
+    private static function markSessionActive(string $sessionId): void {
+        $now = self::nowSql();
+        Database::pdo()->prepare(
+            "UPDATE remote_access_sessions SET status = 'active', last_activity_at = ? WHERE session_id = ?"
+        )->execute([$now, $sessionId]);
+    }
+
+    public static function closeActiveSessionsForDevice(string $deviceId, string $reason): void {
+        $st = Database::pdo()->prepare(
+            "SELECT session_id FROM remote_access_sessions WHERE device_id = ? AND status IN ('pending','active')"
+        );
+        $st->execute([$deviceId]);
+        foreach ($st->fetchAll(PDO::FETCH_COLUMN) as $sid) {
+            self::closeSession((string) $sid, self::STATUS_CLOSED, $reason);
+        }
+    }
+
+    public static function closeSession(string $sessionId, string $status, string $reason): void {
+        $now = self::nowSql();
+        Database::pdo()->prepare(
+            'UPDATE remote_access_sessions SET status = ?, close_reason = ?, closed_at = ?, last_activity_at = ? WHERE session_id = ?'
+        )->execute([$status, $reason, $now, $now, $sessionId]);
+    }
+
+    /** @return array{ok:bool,session_id?:string} */
+    public static function openSession(string $deviceId, int $operatorUserId, ?int $companyId = null): array {
+        self::ensureSchema();
+        $device = self::findDevice($deviceId);
+        if (!$device || !(int) ($device['whitelisted'] ?? 0)) {
+            return ['ok' => false, 'error' => 'device_not_whitelisted'];
+        }
+        if ((string) ($device['opt_in_mode'] ?? self::OPT_NONE) !== self::OPT_WIREGUARD) {
+            return ['ok' => false, 'error' => 'device_not_opted_in_wg'];
+        }
+        self::closeActiveSessionsForDevice($deviceId, 'superseded');
+        $sessionId = self::uuid4();
+        $companyId = $companyId ?? (int) ($device['company_id'] ?? Rbac::defaultCompanyId());
+        $endpoint = (string) cfg('remote_access.wg_endpoint', 'ra.apps.f0xx.org:51820');
+        $expiresAt = time() + (int) cfg('remote_access.session_ttl_s', 3600);
+        $now = self::nowSql();
+        Database::pdo()->prepare(
+            'INSERT INTO remote_access_sessions (session_id, device_id, company_id, operator_user_id, status, tunnel, endpoint, expires_at, last_activity_at, created_at)
+             VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)'
+        )->execute([
+            $sessionId,
+            $deviceId,
+            $companyId,
+            $operatorUserId,
+            self::STATUS_PENDING,
+            'wireguard',
+            $endpoint,
+            $expiresAt,
+            $now,
+            $now,
+        ]);
+        self::logEvent($deviceId, $sessionId, $operatorUserId, 'session_open', 'operator_requested', null, '');
+        return ['ok' => true, 'session_id' => $sessionId];
+    }
+
+    /** @return list<array<string, mixed>> */
+    public static function listDevices(?int $companyId = null): array {
+        self::ensureSchema();
+        $sql = 'SELECT * FROM remote_access_devices';
+        $params = [];
+        if ($companyId !== null && !Rbac::isGlobalAdmin()) {
+            $sql .= ' WHERE company_id = ?';
+            $params[] = $companyId;
+        }
+        $sql .= ' ORDER BY last_seen_at DESC, device_id ASC';
+        $st = Database::pdo()->prepare($sql);
+        $st->execute($params);
+        return $st->fetchAll(PDO::FETCH_ASSOC) ?: [];
+    }
+
+    /** @return list<array<string, mixed>> */
+    public static function listSessions(string $statusFilter = ''): array {
+        self::ensureSchema();
+        $sql = 'SELECT s.*, d.opt_in_mode, d.app_version AS device_app_version FROM remote_access_sessions s
+                LEFT JOIN remote_access_devices d ON d.device_id = s.device_id';
+        $params = [];
+        if ($statusFilter !== '') {
+            $sql .= ' WHERE s.status = ?';
+            $params[] = $statusFilter;
+        }
+        $sql .= ' ORDER BY s.id DESC LIMIT 200';
+        $st = Database::pdo()->prepare($sql);
+        $st->execute($params);
+        return $st->fetchAll(PDO::FETCH_ASSOC) ?: [];
+    }
+
+    /** @return list<array<string, mixed>> */
+    public static function listEvents(int $limit = 100): array {
+        self::ensureSchema();
+        $st = Database::pdo()->prepare('SELECT * FROM remote_access_events ORDER BY id DESC LIMIT ?');
+        $st->bindValue(1, max(1, min(500, $limit)), PDO::PARAM_INT);
+        $st->execute();
+        return $st->fetchAll(PDO::FETCH_ASSOC) ?: [];
+    }
+
+    public static function setDeviceWhitelist(string $deviceId, bool $whitelisted, ?string $notes = null): bool {
+        self::ensureSchema();
+        $device = self::findDevice($deviceId);
+        if (!$device) {
+            Database::pdo()->prepare(
+                'INSERT INTO remote_access_devices (device_id, company_id, whitelisted, notes, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?)'
+            )->execute([
+                $deviceId,
+                Rbac::defaultCompanyId(),
+                $whitelisted ? 1 : 0,
+                $notes,
+                self::nowSql(),
+                self::nowSql(),
+            ]);
+            return true;
+        }
+        Database::pdo()->prepare(
+            'UPDATE remote_access_devices SET whitelisted = ?, notes = COALESCE(?, notes), updated_at = ? WHERE device_id = ?'
+        )->execute([$whitelisted ? 1 : 0, $notes, self::nowSql(), $deviceId]);
+        return true;
+    }
+
+    public static function purgeStale(int $maxAgeHours = 24): int {
+        self::ensureSchema();
+        $cutoff = time() - max(1, $maxAgeHours) * 3600;
+        $pdo = Database::pdo();
+        if (Database::isMysql()) {
+            $st = $pdo->prepare(
+                "SELECT session_id FROM remote_access_sessions WHERE status IN ('inactive','closed','closed_timeout','pending','active')
+                 AND ((expires_at IS NOT NULL AND expires_at < ?) OR (last_activity_at IS NOT NULL AND UNIX_TIMESTAMP(last_activity_at) < ?))"
+            );
+            $st->execute([time(), $cutoff]);
+        } else {
+            $cutoffIso = gmdate('Y-m-d H:i:s', $cutoff);
+            $st = $pdo->prepare(
+                "SELECT session_id FROM remote_access_sessions WHERE status IN ('inactive','closed','closed_timeout','pending','active')
+                 AND ((expires_at IS NOT NULL AND expires_at < ?) OR (last_activity_at IS NOT NULL AND last_activity_at < ?))"
+            );
+            $st->execute([time(), $cutoffIso]);
+        }
+        $n = 0;
+        foreach ($st->fetchAll(PDO::FETCH_COLUMN) as $sid) {
+            self::closeSession((string) $sid, self::STATUS_CLOSED_TIMEOUT, 'purge_stale');
+            $n++;
+        }
+        return $n;
+    }
+
+    public static function logEvent(
+        string $deviceId,
+        ?string $sessionId,
+        ?int $actorUserId,
+        string $action,
+        ?string $reason,
+        ?array $meta,
+        string $clientIp
+    ): void {
+        self::ensureSchema();
+        Database::pdo()->prepare(
+            'INSERT INTO remote_access_events (session_id, device_id, actor_user_id, action, reason, meta_json, client_ip, created_at)
+             VALUES (?, ?, ?, ?, ?, ?, ?, ?)'
+        )->execute([
+            $sessionId,
+            $deviceId,
+            $actorUserId,
+            $action,
+            $reason,
+            $meta !== null ? json_encode($meta, JSON_UNESCAPED_UNICODE) : null,
+            $clientIp !== '' ? $clientIp : null,
+            self::nowSql(),
+        ]);
+    }
+
+    /** @param array<string, mixed> $extra */
+    private static function raEnvelope(string $action, array $extra = []): array {
+        return array_merge([
+            'type' => 'ra',
+            'action' => $action,
+            'server_date' => time(),
+        ], $extra);
+    }
+
+    private static function nowSql(): string {
+        return Database::isMysql() ? date('Y-m-d H:i:s') : gmdate('Y-m-d H:i:s');
+    }
+
+    private static function uuid4(): string {
+        $b = random_bytes(16);
+        $b[6] = chr((ord($b[6]) & 0x0f) | 0x40);
+        $b[8] = chr((ord($b[8]) & 0x3f) | 0x80);
+        $h = bin2hex($b);
+        return substr($h, 0, 8) . '-' . substr($h, 8, 4) . '-' . substr($h, 12, 4)
+            . '-' . substr($h, 16, 4) . '-' . substr($h, 20, 12);
+    }
+}
--- a/examples/crash_reporter/backend/src/bootstrap.php
+++ b/examples/crash_reporter/backend/src/bootstrap.php
@@ -45,6 +45,7 @@ require_once __DIR__ . '/TicketCommentRepository.php';
 require_once __DIR__ . '/UserRepository.php';
 require_once __DIR__ . '/TicketRepository.php';
 require_once __DIR__ . '/GraphRepository.php';
+require_once __DIR__ . '/RemoteAccessRepository.php';
 require_once __DIR__ . '/AnalyticsHead.php';

 function cfg(string $key, $default = null) {
--- a/examples/crash_reporter/backend/views/layout.php
+++ b/examples/crash_reporter/backend/views/layout.php
@@ -34,6 +34,9 @@
  <?php if (($view ?? '') === 'graphs'): ?>
  <script src="<?= h(Auth::basePath()) ?>/assets/js/graphs.js" defer></script>
  <?php endif; ?>
+  <?php if (($view ?? '') === 'remote_access'): ?>
+  <script src="<?= h(Auth::basePath()) ?>/assets/js/remote_access.js" defer></script>
+  <?php endif; ?>
  <?php AnalyticsHead::render('crashes'); ?>
 </head>
 <body data-base-path="<?= h(Auth::basePath()) ?>"
@@ -87,6 +90,17 @@
            <span class="nav-label">Graphs</span>
          </a>
        </li>
+        <?php if (Rbac::can('remote_access_view')): ?>
+        <li>
+          <a href="<?= h(Auth::basePath()) ?>/?view=remote_access"
+             class="nav-link <?= ($view ?? '') === 'remote_access' ? 'active' : '' ?>"
+             aria-label="Remote access"
+             title="Remote access">
+            <span class="nav-icon nav-icon--reports" aria-hidden="true"></span>
+            <span class="nav-label">Remote access</span>
+          </a>
+        </li>
+        <?php endif; ?>
        <li>
          <a href="/app/androidcast_project/build/"
             class="nav-link"
@@ -320,6 +334,108 @@
            <code><?= h(Auth::basePath()) ?>/api/graphs.php</code>
          </p>
        </div>
+      <?php elseif (($view ?? '') === 'remote_access'): ?>
+        <div id="remote-access-app" class="reports-app">
+          <div class="toolbar reports-toolbar">
+            <h1>Remote access</h1>
+            <div class="toolbar-actions">
+              <label class="toolbar-select">
+                <span>Theme</span>
+                <select id="theme-select" aria-label="UI theme">
+                  <option value="dark">Dark</option>
+                  <option value="light">Light</option>
+                </select>
+              </label>
+            </div>
+          </div>
+          <nav class="graphs-quick-links" aria-label="Related services">
+            <a href="<?= h(Auth::basePath()) ?>/?view=home">Console home</a>
+            <a href="<?= h(Auth::basePath()) ?>/?view=reports">Crash reports</a>
+            <a href="<?= h(Auth::basePath()) ?>/?view=tickets">Tickets</a>
+            <a href="/app/androidcast_project/graphs/">Graphs</a>
+            <a href="/app/androidcast_project/build/">Builder</a>
+            <a href="/app/androidcast_project/">Hub</a>
+          </nav>
+          <p id="ra-status" class="reports-status muted" aria-live="polite">Loading…</p>
+
+          <section class="graphs-scope">
+            <h2 class="graphs-scope-title">Whitelisted devices</h2>
+            <div class="reports-table-wrap">
+              <table class="data-table reports-table--cols" id="ra-devices-table">
+                <thead>
+                  <tr>
+                    <th scope="col">Device ID</th>
+                    <th scope="col">Opt-in</th>
+                    <th scope="col">Whitelisted</th>
+                    <th scope="col">Last seen</th>
+                    <th scope="col">App</th>
+                    <th scope="col">Actions</th>
+                  </tr>
+                </thead>
+                <tbody id="ra-devices-tbody"></tbody>
+              </table>
+            </div>
+            <form id="ra-whitelist-form" class="tag-editor-add" style="margin-top:1rem">
+              <label class="tag-field"><span>Device ID</span><input type="text" name="device_id" required maxlength="128"></label>
+              <label class="tag-field"><span>Notes</span><input type="text" name="notes" maxlength="255"></label>
+              <button type="submit" class="btn">Add / whitelist</button>
+            </form>
+          </section>
+
+          <section class="graphs-scope">
+            <h2 class="graphs-scope-title">Active / pending sessions</h2>
+            <div class="reports-table-wrap">
+              <table class="data-table reports-table--cols" id="ra-active-table">
+                <thead>
+                  <tr>
+                    <th scope="col">Session</th>
+                    <th scope="col">Device</th>
+                    <th scope="col">Status</th>
+                    <th scope="col">Tunnel</th>
+                    <th scope="col">Endpoint</th>
+                    <th scope="col">Actions</th>
+                  </tr>
+                </thead>
+                <tbody id="ra-active-tbody"></tbody>
+              </table>
+            </div>
+          </section>
+
+          <section class="graphs-scope">
+            <h2 class="graphs-scope-title">Inactive / closed sessions</h2>
+            <div class="reports-table-wrap">
+              <table class="data-table reports-table--cols" id="ra-inactive-table">
+                <thead>
+                  <tr>
+                    <th scope="col">Session</th>
+                    <th scope="col">Device</th>
+                    <th scope="col">Status</th>
+                    <th scope="col">Closed</th>
+                    <th scope="col">Reason</th>
+                  </tr>
+                </thead>
+                <tbody id="ra-inactive-tbody"></tbody>
+              </table>
+            </div>
+          </section>
+
+          <section class="graphs-scope">
+            <h2 class="graphs-scope-title">Audit log</h2>
+            <div class="reports-table-wrap">
+              <table class="data-table reports-table--cols" id="ra-events-table">
+                <thead>
+                  <tr>
+                    <th scope="col">Time</th>
+                    <th scope="col">Device</th>
+                    <th scope="col">Action</th>
+                    <th scope="col">Reason</th>
+                  </tr>
+                </thead>
+                <tbody id="ra-events-tbody"></tbody>
+              </table>
+            </div>
+          </section>
+        </div>
      <?php endif; ?>
    </main>
  </div>
--- a/orchestration/deploy.sh
+++ b/orchestration/deploy.sh
@@ -111,6 +111,7 @@ return [
 EOF

 SRC_MIG_070="$ROOT_DIR/runtime/db-init/070_graph_ecosystem.sql"
+SRC_MIG_007="$ROOT_DIR/runtime/db-init/007_remote_access.sql"

 write_migration_with_db() {
  local src="$1"
@@ -129,6 +130,7 @@ write_migration_with_db "$SRC_MIG_004" "$DB_INIT_DIR/040_ticket_workflow.sql"
 write_migration_with_db "$SRC_MIG_005" "$DB_INIT_DIR/050_ticket_attachments.sql"
 write_migration_with_db "$SRC_MIG_060" "$DB_INIT_DIR/060_build_ecosystem.sql"
 write_migration_with_db "$SRC_MIG_070" "$DB_INIT_DIR/070_graph_ecosystem.sql"
+write_migration_with_db "$SRC_MIG_007" "$DB_INIT_DIR/007_remote_access.sql"

 echo "Pulling images..."
 docker compose -f "$ROOT_DIR/docker-compose.yml" pull landing-fe gitea-fe crashes-fe build-fe mariadb gitea || true
--- a/orchestration/runtime/db-init/007_remote_access.sql
+++ b/orchestration/runtime/db-init/007_remote_access.sql
@@ -0,0 +1,56 @@
+-- Remote access control plane (WireGuard v1; reverse SSH reserved).
+-- MariaDB / production: mysql -u root -p androidcast_crashes < sql/migrations/007_remote_access.sql
+
+CREATE TABLE IF NOT EXISTS remote_access_devices (
+    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    device_id VARCHAR(128) NOT NULL,
+    company_id INT UNSIGNED NOT NULL DEFAULT 1,
+    whitelisted TINYINT(1) NOT NULL DEFAULT 0,
+    opt_in_mode ENUM('none','wireguard','rssh') NOT NULL DEFAULT 'none',
+    last_random VARCHAR(96) NULL,
+    app_version VARCHAR(64) NULL,
+    last_seen_at TIMESTAMP NULL,
+    notes TEXT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    UNIQUE KEY uq_ra_device (device_id),
+    KEY idx_ra_device_company (company_id),
+    KEY idx_ra_device_whitelist (whitelisted, opt_in_mode)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS remote_access_sessions (
+    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    session_id VARCHAR(36) NOT NULL,
+    device_id VARCHAR(128) NOT NULL,
+    company_id INT UNSIGNED NOT NULL DEFAULT 1,
+    operator_user_id INT UNSIGNED NULL,
+    status ENUM('pending','active','inactive','closed','closed_timeout') NOT NULL DEFAULT 'pending',
+    tunnel ENUM('wireguard','ssh_reverse') NOT NULL DEFAULT 'wireguard',
+    endpoint VARCHAR(255) NULL,
+    wg_client_private_key VARCHAR(64) NULL,
+    wg_client_address VARCHAR(64) NULL,
+    wg_server_public_key VARCHAR(64) NULL,
+    wg_peer_allowed_ips VARCHAR(255) NULL,
+    expires_at INT UNSIGNED NULL,
+    last_activity_at TIMESTAMP NULL,
+    close_reason VARCHAR(255) NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    closed_at TIMESTAMP NULL,
+    UNIQUE KEY uq_ra_session (session_id),
+    KEY idx_ra_sess_device (device_id, status),
+    KEY idx_ra_sess_status (status, last_activity_at)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS remote_access_events (
+    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    session_id VARCHAR(36) NULL,
+    device_id VARCHAR(128) NOT NULL,
+    actor_user_id INT UNSIGNED NULL,
+    action VARCHAR(64) NOT NULL,
+    reason VARCHAR(255) NULL,
+    meta_json LONGTEXT NULL,
+    client_ip VARCHAR(64) NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    KEY idx_ra_evt_device (device_id, created_at),
+    KEY idx_ra_evt_session (session_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
--- a/orchestration/runtime/db-init/007_remote_access.sqlite.sql
+++ b/orchestration/runtime/db-init/007_remote_access.sqlite.sql
@@ -0,0 +1,50 @@
+-- SQLite dev mirror for remote access tables.
+
+CREATE TABLE IF NOT EXISTS remote_access_devices (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    device_id TEXT NOT NULL UNIQUE,
+    company_id INTEGER NOT NULL DEFAULT 1,
+    whitelisted INTEGER NOT NULL DEFAULT 0,
+    opt_in_mode TEXT NOT NULL DEFAULT 'none',
+    last_random TEXT NULL,
+    app_version TEXT NULL,
+    last_seen_at TEXT NULL,
+    notes TEXT NULL,
+    created_at TEXT NOT NULL DEFAULT (datetime('now')),
+    updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE TABLE IF NOT EXISTS remote_access_sessions (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    session_id TEXT NOT NULL UNIQUE,
+    device_id TEXT NOT NULL,
+    company_id INTEGER NOT NULL DEFAULT 1,
+    operator_user_id INTEGER NULL,
+    status TEXT NOT NULL DEFAULT 'pending',
+    tunnel TEXT NOT NULL DEFAULT 'wireguard',
+    endpoint TEXT NULL,
+    wg_client_private_key TEXT NULL,
+    wg_client_address TEXT NULL,
+    wg_server_public_key TEXT NULL,
+    wg_peer_allowed_ips TEXT NULL,
+    expires_at INTEGER NULL,
+    last_activity_at TEXT NULL,
+    close_reason TEXT NULL,
+    created_at TEXT NOT NULL DEFAULT (datetime('now')),
+    closed_at TEXT NULL
+);
+
+CREATE TABLE IF NOT EXISTS remote_access_events (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    session_id TEXT NULL,
+    device_id TEXT NOT NULL,
+    actor_user_id INTEGER NULL,
+    action TEXT NOT NULL,
+    reason TEXT NULL,
+    meta_json TEXT NULL,
+    client_ip TEXT NULL,
+    created_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX IF NOT EXISTS idx_ra_evt_device ON remote_access_events(device_id, created_at);
+CREATE INDEX IF NOT EXISTS idx_ra_sess_device ON remote_access_sessions(device_id, status);
--- a/scripts/init-wireguard-submodule.sh
+++ b/scripts/init-wireguard-submodule.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+# Initialize wireguard-android submodule for embedded tunnel (optional but recommended for production WG).
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$ROOT"
+if [[ ! -d third-party/wireguard-android/.git ]]; then
+  git submodule add https://git.zx2c4.com/wireguard-android third-party/wireguard-android || \
+    git clone --depth 1 https://git.zx2c4.com/wireguard-android third-party/wireguard-android
+fi
+git submodule update --init --recursive third-party/wireguard-android
+echo "wireguard-android ready under third-party/wireguard-android"
+echo "Gradle includes :tunnel when third-party/wireguard-android/tunnel exists."
--- a/settings.gradle
+++ b/settings.gradle
@@ -20,3 +20,9 @@ rootProject.name = "AndroidCast"
 include ':app'
 include ':session-studio'
 project(':session-studio').projectDir = file('desktop/session-studio')
+
+def wgTunnelDir = file('third-party/wireguard-android/tunnel')
+if (wgTunnelDir.exists()) {
+    include ':tunnel'
+    project(':tunnel').projectDir = wgTunnelDir
+}
--- a/third-party/README.md
+++ b/third-party/README.md
@@ -1,15 +1,18 @@
-# Third-party native dependencies
+# Third-party vendored dependencies

-Initialize submodules:
+## wireguard-android (optional Gradle module)
+
+Remote access WireGuard v1 can use the in-app `RemoteAccessVpnService` fallback (TUN only).
+For full userspace WireGuard crypto/data plane, initialize the upstream tunnel library:

 ```bash
-git submodule update --init --recursive
+bash scripts/init-wireguard-submodule.sh
 ```

-| Path | Project | Use |
-|------|---------|-----|
-| `libvpx/` | [webmproject/libvpx](https://github.com/webmproject/libvpx) | VP8/VP9 software codec |
-| `opus/` | [xiph/opus](https://github.com/xiph/opus) | Opus audio (in-band FEC) |
-| `speex/` | [xiph/speex](https://github.com/xiph/speex) | Speex audio |
+Then build with the `:tunnel` module (auto-included when present):

-Built via `ndk/CMakeLists.txt` into `libandroidcast_codecs.so`.
+- Submodule path: `third-party/wireguard-android/`
+- Gradle module: `third-party/wireguard-android/tunnel`
+- License: MIT / Apache-2.0 (see upstream `COPYING`)
+
+`WireGuardTunnelBridge` loads `com.wireguard.android.backend.GoBackend` via reflection when the module is on the classpath.