STUN client - Configuration Session Traversal Utilities for NAT (STUN) is a protocol that serves as a tool for other protocols in dealing with Network Address Translator (NAT) traversal. Select the desired values and click "Apply/Save" to configure the STUN client options. Disable Enable STUN Server Address: STUN Server Port: STUN User Name: STUN Password: Max KeepAlive Period: Min KeepAlive Period: