Hello, We have 2 grandstream GX 2000 phones behind NAT and Asterisk outside this natted network. We have the issue with calls to these SIP phones - no audio. It is probably the problem with port forwarding on router - but I am not sure how can I forward same sip ports (5004 to 5100) to two phones (nat addresses?)? Any help appreciated! Z. Zivanovic -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20101015/223c92e2/attachment.htm
Roger Burton West
2010-Oct-15 16:30 UTC
[asterisk-users] SIP - no audio behind nat problem
On Fri, Oct 15, 2010 at 06:22:07PM +0200, Zarko Zivanovic wrote:>We have 2 grandstream GX 2000 phones behind NAT and Asterisk outside this >natted network.The simplest solution will be to stick another Asterisk box inside the NAT and tunnel IAX or SIP over a VPN. R
On Friday 15 Oct 2010, Zarko Zivanovic wrote:> Hello, > > We have 2 grandstream GX 2000 phones behind NAT and Asterisk outside this > natted network. > > We have the issue with calls to these SIP phones - no audio. > > It is probably the problem with port forwarding on router - but I am not > sure how can I forward same sip ports (5004 to 5100) to two phones (nat > addresses?)?Simple answer, don't run SIP through NAT. Have another Asterisk server on the outside and run IAX2 through NAT instead. Much cleaner :) -- AJS
On Fri, Oct 15, 2010 at 06:22:07PM +0200, Zarko Zivanovic wrote:> We have 2 grandstream GX 2000 phones behind NAT and Asterisk outside this > natted network. > > We have the issue with calls to these SIP phones - no audio.Tell us more about your settings. I have a GXP2000 behing NAT connected to an * (behind NAT) without problems and without any portforwards at the Grandstream side. nat=yes and canreinvite=no as always do the trick for me. -- Daniel Tryba