[OpenSIPS-Users] nathelper config

Andrew Pogrebennyk apogrebennyk at sipwise.com
Thu Oct 13 16:28:44 CEST 2011

There is not enough information in your email to give you a suggestion.
Please collect the sip trace with ngrep; you need to verify that IP
address in SDP c-line is changed to the address of your proxy in both
directions. Looking at your config I don't see calls to rtpproxy_offer()
To check the NAT status of the callee tell usrloc to load it into flag
6: modparam("usrloc", "nat_bflag", 6)
Then if any of the caller, callee are behind NAT, call rtpproxy_offer in
request route and rtpproxy_answer in reply route. Do not expect that
both parties will be behind NAT at the same time and it will work well.

On 10/13/2011 01:15 PM, Nick wrote:
> Hello Andrew
> Thanks.
> I installed rtpproxy server OK. And then, I started opensips server OK.
> I have two iphone 4, I want to test sip and video.
> Network setting, one is wifi, other is 3G
> 3G wifi
> iphone -----> opensips <- NAT device <----- iphone
> I can see wifi video and listen voice in my 3G network. But I can't see
> 3G video and listen voice in my wifi network.
> Can you give me any suggest??
> Thanks advance.
> Nick

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