SIPC-588 — Listening socket missing for outgoing direction
The SIP proxy tried to use a proper outgoing interface for forwarded datagram/connection. However, no corresponding listening socket has been found.
Proxy rejects the request.
Please, check the destination. Either the next-hop (PLUG-TO) is incorrectly defined in the configuration, or an unwilling transparent connection occured that should be rejected by means of ACL, or some socket address is missing in the LISTEN-ON configuration.