AFL Firewall can do this atm.
The problem with blocking via VPN is if we close app vpn also closes (instead of running in background as service) which can happen due to clearing all apps.
> The problem with blocking via VPN is if we close app vpn also closes (instead of running in background as service) which can happen due to clearing all apps.
For this problem specifically, you can turn on "Always-on VPN" (to avoid a particular VPN app from being killed or replaced by another VPN app) and "Block connections without VPN" (to avoid traffic from leaking when the VPN app is killed or crashes) against any VPN app from Android's VPN Settings page. RethinkDNS supports both these settings.
> i wish it had added root support which doesn't need vpn to block ip and can use iptables directly.
The only available VPN slot going to a non-VPN app is indeed a deal breaker for many, and so, we plan to add support for WireGuard soon.
Always on VPN doesn't work at least on the Redmi Phone stock rom. When I clear app by closing all apps I get notification "Disconnected from always on VPN" and if i open rethink app it disconnects. So I have to keep it running . I wish there was a way where even if I clear app vpn app runs in background even if I clear all apps..
Strange. We plan to separate UI from the VPN process which would avoid scenarios where clearing up UI process clears up the VPN too: https://github.com/celzero/rethink-app/issues/95
To be clear, you can still clear the activity stack (swipe up dismiss RethinkDNS from Android's Recents screen) which doesn't shutdown VPN; at least not on devices I've tested it on (like the OnePluses and the Oppos). MiUI seems to be aggressive here.