HomeAppsToolsSTU for NATApps like STU for NAT Here are some great alternatives to STU for NAT by Tabuci Victor : JLPT, JFT, NAT test listening ★4.0 FRP ★4.1 UDP Sender / Receiver ★3.4 Net Tools ★3.0 Ping ★4.7 H-W UDP ★4.1 AndProxy ★3.8 Ikev2 End-to-End Encryption ★3.8 Fast Port Scanner ★3.5 NetPal - netcat for Android ★4.3 Ping Tools - Network Utilities ★3.8 UDP TUNNEL ★4.2 IPTools ★4.0 Golden Udp Max ★3.6 UDP Guard ★4.3 Mocha Ping Lite ★4.0