AFWall+

AFWall+ is a free, open-source Android firewall application that gives users detailed control over network access on rooted devices. Built on Linux iptables, it allows individual applications to be permitted or blocked from accessing the internet. Users can configure separate connection rules for Wi-Fi, mobile data, VPNs, tethering, and local networks. Its profile management system enables different firewall configurations for specific situations. AFWall+ provides connection logging, blocked traffic notifications, and advanced rule scripting for network monitoring. It also supports IPv4 and IPv6, multi-user environments, and automation through Tasker or Locale. By enforcing network restrictions at the system level, it helps reduce unwanted connections, background data consumption, and potential information leaks.