On Thu, Jun 12, 2014 at 12:56 PM, Voipper <[email protected]> wrote:
> Hi All, > > I want to know the UAC and UAS behavior during NAT > This is a rather open question. > 1. How to know SIP NAT or UAC behind NAT from wireshark logs > There's several possible indicators, such as the use of private IP addresses (RFC1918) in the Contact: header for example. > 2. What are the parameter that need to set at UAC to overcome NAT > There are many ways to overcome NAT. Some methods more effective than others. Using "ICE" (RFC5245) tends to be the most effective for media, which is sort of a mix of STUN/TURN listing "candidate" IP addresses in the SDP and probing them. Sadly it's not widely deployed by UAs. SBCs tend to be clever and adjust to RTP coming from a different address than the one advertised in the SDP and send RTP there instead, which works for the common case of symmetric RTP. SIP responses are usually fine with the use of rport (RFC 3581) Cheers, Moy *Moises Silva**Manager, Software Engineering* [email protected] Sangoma Technologies 100 Renfrew Drive, Suite 100, Markham, ON L3R 9R6 Canada t. +1 800 388 2475 (N. America) t. +1 905 474 1990 x128 f. +1 905 474 9223 <http://www.sangoma.com/contact?utm_source=signature&utm_medium=email&utm_campaign=email+signatures> Products <http://sangoma.com/products?utm_source=signature&utm_medium=email&utm_campaign=email%2Bsignatures> | Solutions <http://sangoma.com/solutions?utm_source=signature&utm_medium=email&utm_campaign=email%2Bsignatures> | Events <http://sangoma.com/about_us/events?utm_source=signature&utm_medium=email&utm_campaign=email%2Bsignatures> | Contact <http://www.sangoma.com/contact?utm_source=signature&utm_medium=email&utm_campaign=email%2Bsignatures> | Wiki <http://wiki.sangoma.com/?utm_source=signature&utm_medium=email&utm_campaign=email%2Bsignatures> | Facebook <http://www.facebook.com/pages/Sangoma-VoIP-Cards/43578453335?utm_source=signature&utm_medium=email&utm_campaign=email%2Bsignatures> | Twitter <http://www.twitter.com/sangoma?utm_source=signature&utm_medium=email&utm_campaign=email%2Bsignatures>`| | YouTube <http://www.youtube.com/sangomatechnologies?utm_source=signature&utm_medium=email&utm_campaign=email%2Bsignatures> _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
