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STUN (Simple Traversal of User Datagram Protocol Through Network Address Translators) defined in RFC 3489 (and RFC 5389) is one mechanism for NAT traversal. It assists SIP clients behind a NAT firewall or router with their packet routing. SailFin V2 now has a basic STUN server, which SIP clients can use. Checkout Ramesh's blog to find all details. |