How To Configure ScopTEL with NAT (Network Address Translation)

ScopTEL includes a SBC that does a very good job of handling NAT’d extensions and trunks when the peer supports RPORT.

This article covers the recommended configuration for ScopTEL and NAT.

  • ICE/STUN/TURN are not mandatory and aren’t recommended
  • There are mandatory settings when ScopTEL is not exposed directly to the Internet on its public interface and its sitting behind a third party NAT router. This article does not cover third party router configurations or port forwarding requirements.
  • The default ports used for ScopTEL SIP traffic are:
  • udp/5060 (used for UDP SIP signalling traffic)
  • tcp/5060 (used for TCP SIP signalling traffic)
  • tcp/5061 (used for TLS/SRTP SIP signalling traffic)
  • udp/10000-20000 (used for UDP SIP RTP traffic)
  • tcp/10000-2000 (used for SIP SRTP traffic)