Connecting things to your VPN made simple. Share your VPN connection over hotspot or repeater. (root required)
or XDA Labs

This app is useful for:

• Connecting things that don't support VPN like Chromecasts behind corporate firewalls;
• Setting up gapps behind corporate firewalls;
• Connecting to your mobile hotspot but you're not bothered to set up VPN on your device;
• Identifying, monitoring and blocking (unwanted) clients;
• Bypassing tethering limits by:
  • (recommended) Use this app with a real VPN/socksifier; (ad-blocker may not work)
  • (might or might not work based on your carrier) Use this app with TTL editor like TTL Master;
  • Try your luck and simply use this app.

P.S. You can also do the similar on Windows, Mac, and iOS. I don't know about you but I can't get my stupid Windows 10 to work with hosted network now that they introduced this Mobile hotspot.

This app is designed to do only minimal changes to your system, so there's almost no chance you will brick your device and/or break your Internet using this app under normal conditions. However there's also absolutely no guarantee it won't.

Search the issue tracker for more.

This could caused by the Wi-Fi channel you selected is no longer available, due to:

1. Your device doesn't support operating on this channel, or
2. There is some nearby Wi-Fi direct device that broadcasted that it can't operate on the channel you picked.

For maximum stability, you need to set channel = 0 so that your device will pick a channel automatically. You can also use WPS to connect your 2.4GHz-only device to force the repeater to switch from 5GHz to 2.4GHz for this time.

This app requires root to make changes to iptables and ip rule. This restriction is imposed by Linux kernel.

Without root, you can only:

• View connected devices for system tethering and monitor them;
• Create a hotspot that has only LAN connections;
• Toggle tether switches if you can't do it already;
• Play around with settings and the user interface in general;
• Alternatively you can use try these apps (requires manual proxy configuration or client apps) for normal repeater tethering/bypassing tethering limits: (note: these apps are neither free nor open source)
  • PdaNet+
  • NetShare-no-root-tethering

a.k.a. things that can go wrong if this app doesn't work.

This is a list of stuff that might impact this app's functionality if unavailable. This is only meant to be an index. You can read more in the source code.

API light grey list:

• (since API 24) Landroid/bluetooth/BluetoothPan;->isTetheringOn()Z
• (since API 24) Landroid/net/ConnectivityManager;->getLastTetherError(Ljava/lang/String;)I
• (deprecated since API 26) Landroid/net/wifi/WifiManager;->setWifiApEnabled(Landroid/net/wifi/WifiConfiguration;Z)Z
• Landroid/net/wifi/p2p/WifiP2pGroup;->getNetworkId()I
• Landroid/net/wifi/p2p/WifiP2pGroupList;->getGroupList()Ljava/util/Collection;
• Landroid/net/wifi/p2p/WifiP2pManager;->deletePersistentGroup(Landroid/net/wifi/p2p/WifiP2pManager$Channel;ILandroid/net/wifi/p2p/WifiP2pManager$ActionListener;)V
• Landroid/net/wifi/p2p/WifiP2pManager;->requestPersistentGroupInfo(Landroid/net/wifi/p2p/WifiP2pManager$Channel;Landroid/net/wifi/p2p/WifiP2pManager$PersistentGroupInfoListener;)V
• Landroid/net/wifi/p2p/WifiP2pManager;->setWifiP2pChannels(Landroid/net/wifi/p2p/WifiP2pManager$Channel;IILandroid/net/wifi/p2p/WifiP2pManager$ActionListener;)V
• Landroid/net/wifi/p2p/WifiP2pManager;->startWps(Landroid/net/wifi/p2p/WifiP2pManager$Channel;Landroid/net/wifi/WpsInfo;Landroid/net/wifi/p2p/WifiP2pManager$ActionListener;)V
• Ljava/net/InetAddress;->parseNumericAddress(Ljava/lang/String;)Ljava/net/InetAddress;

Unlisted private API:

• (since API 24) Landroid/net/ConnectivityManager;->startTethering(IZLandroid/net/ConnectivityManager$OnStartTetheringCallback;Landroid/os/Handler;)V
• (since API 24) Landroid/net/ConnectivityManager;->stopTethering(I)V

Private system configurations:

• @android:array/config_tether_usb_regexs
• @android:array/config_tether_wifi_regexs
• @android:array/config_tether_wimax_regexs
• @android:array/config_tether_bluetooth_regexs

Other:

• (since API 27) android.provider.Settings.Global.TETHER_OFFLOAD_DISABLED is assumed to be "tether_offload_disabled".
• (since API 27) com.android.server.connectivity.tethering.OffloadHardwareInterface.DEFAULT_TETHER_OFFLOAD_DISABLED is assumed to be 0.
• Activity com.android.settings/.Settings$TetherSettingsActivity is assumed to be exported;
• Several constants in ConnectivityManager is assumed to be defined as in TetheringManager.kt;
• android.net.conn.TETHER_STATE_CHANGED is assumed to be a sticky broadcast.

For ip rule priorities, RULE_PRIORITY_SECURE_VPN and RULE_PRIORITY_TETHERING is assumed to be 12000 and 18000 respectively; RULE_PRIORITY_DEFAULT_NETWORK is assumed to be 22000 (or at least > 18000) for API 27-. DHCP server like dnsmasq is assumed to run and send DHCP packets as root.

Undocumented system binaries are all bundled and executable:

• Since API 24: iptables-save;
• echo;
• ip (link monitor neigh rule with proper output format);
• iptables (with correct version corresponding to API level, -nvx -L <chain> with proper output format);
• su.

If some of these are unavailable, you can alternatively install a recent version (v1.28.1 or higher) of Busybox.

Wi-Fi driver wpa_supplicant:

• P2P configuration file is assumed to be saved to /data/misc/wifi/p2p_supplicant.conf or /data/vendor/wifi/wpa/p2p_supplicant.conf for API 28+ and have reasonable format;
• Android system is expected to restart wpa_supplicant after it crashes.