[SIPForum-discussion] SIP using NAT

[alexander.mosso at nekotec.com.mx]

Greetings.

I have a SIP server behind NAT and I want extern SIP phones to use it. Everything works fine with internal phones.

I need to know exaclty how does it works... what parameters do I have to change in the headers and SDP content.
Does anyone have or know a good document whit this information?

Thanks in advance.

John.
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