[asterisk-users] On SIP INVITE answering to IP:port found in Contact: header.

Matthew J. Roth mroth at imminc.com
Wed Apr 17 17:54:46 CDT 2013

Joshua Colp wrote:
> Most of your response is correct except it doesn't take into account the 
> rport RFC. Lack of implementation of an RFC doesn't make it 
> non-compliant, so their stuff really is fine for this scenario. It all 
> comes down to us forcing rport to be on by default.
> This is now the second known platform on my list that uses a random 
> source port for the IP header instead of the actual one. The other 
> being, like I mentioned, older Cisco phones.


I've added RFC 3581 to my list of references.

Thank you for taking the time to look at my response and provide feedback, as
well as for your hard work migrating Asterisk to a new SIP stack.


Matthew Roth
InterMedia Marketing Solutions
Software Engineer and Systems Developer

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