Session Traversal Utilities for NAT (STUN)

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Session Traversal Utilities for NAT (STUN) – A protocol that Versa SD-WAN branches, acting as STUN clients, use to discover the NAT-translated public address that the Controller node, acting as STUN server, sees for each WAN interface, enabling NAT traversal for tunnel establishment. See: NAT Traversal, Troubleshoot SD-WAN Branches