STUN Server

The Oracle® Enterprise Session Border Controller supports RFC 3489, which defines Simple Traversal User Datagram Protocol (UDP) through Network Address Translators (NATs). Known as STUN, this lightweight protocol that allows applications to:

• Discover the presence and types of both NATs and firewalls between themselves and the public Internet
• Determine the public IP addresses allocated to them by the NAT

SIP endpoints use the STUN protocol to find out the public IP addresses and ports for SIP signaling and RTP media transport. Then they can use the address and port information to create multimedia sessions with other endpoints on the public network.

You can define STUN servers functionality on a per-realm basis, allowing you set up multiple STUN servers.