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Transparent SIP communication with NAT

Number, Please

Conclusions

Correct mapping of the internal IP addresses to external IP addresses is essential to enabling unhindered VoIP communication through NAT gateways and firewalls. STUN, TURN, and ICE not only ensure a transparent transition via NAT gateways but also improve the security of the SIP environment as a whole.

Infos

  1. RFC 3022: https://tools.ietf.org/html/rfc3022
  2. RFC 3261: https://tools.ietf.org/html/rfc3261
  3. RFC 3489: https://tools.ietf.org/html/rfc3489
  4. RFC 5389: https://tools.ietf.org/html/rfc5389
  5. RFC 5766: https://tools.ietf.org/html/rfc5766

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