DNS over HTTPS / DNS over Tor / DNSCrypt client, WireGuard proxifier, firewall, and connection tracker for Android.

AFWall+ (Android Firewall +) - iptables based firewall for Android

Android firewall app using Shizuku and VPN modes. and no root required. This app can block internet access of any other apps.

IP and Domain Groups for Netpatch Firewall

plain simple firewall for android

This is sample for Firebase remote config.