[OpenSIPS-Users] two UACs behind the same nat
Bogdan-Andrei Iancu
bogdan at opensips.org
Tue Mar 19 16:10:23 CET 2013
Hi Nick,
So, your opensips should do the NAT traversal for the signaling
(fix_nated_contact() stuff), but it should not do anything in regards to
media (rtpproxy) if caller and callee are behind the same NAT - how to
test that ? after lookup(location), when you know the destination IP of
the callee, you can simply check if SRC IP of the call is the same with
the destination IP - if so, it means caller and callee are behind the
same NAT.
Regards,
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
On 03/18/2013 04:20 PM, Nick wrote:
> Hello
>
> I checked it. It don't to go to the route[nat_fixups].
> But My UACs both behind the same NAT.
>
> How to check why not go to the route[nat_fixups]??
>
> Thanks
> Nick
>
>
> 2013/3/18 Nick Khamis <symack at gmail.com <mailto:symack at gmail.com>>
>
> It will change it if fired. Make sure that you get to
> "route[nat_fixups]" for the call. And for testing, try removing the
> flags" (isflagset(5) || isbflagset(6))" etc... xlog("Why me god:
> $ru\n") always seems to have mercy on our souls. ;)
>
>
> Nick.
>
> On 3/18/13, Nick <nick.chang at kland.com.tw
> <mailto:nick.chang at kland.com.tw>> wrote:
> > Hello
> >
> > I modify my config.
> >
> > route[nat_fixups] {
> > xlog("L_NOTICE","4 NAT FIXED - $fu call $ru ");
> > #---- RTP Proxy handling ---#
> > if (is_method("BYE|CANCEL")) {
> > unforce_rtp_proxy();
> > } else if (is_method("INVITE")){
> > #---- Activates the RTP Proxy for the CALLEE ---#
> > rtpproxy_offer("c","61.67.128.46");
> > };
> > # catch and fix replies
> > t_on_reply("2");
> > }
> >
> > onreply_route[2] {
> > #xlog("incoming reply\n");
> >
> > #---- Handling of the SDP for the 200 or 183 reply ----#
> > #---- If behind nat (flags 5 or 6) start RTP Proxy ----#
> > #---- Activates the RTP Proxy for the CALLER ----#
> > if ( is_method("INVITE") &&
> > (isflagset(5) || isbflagset(6)) &&
> > has_body("application/sdp") ){
> > rtpproxy_answer("c","61.67.128.46");
> > }
> >
> > #---- If the CALLEE is behind NAT, fix the CONTACT HF ----#
> > if (isbflagset(6)) {
> > fix_nated_contact();
> > search_append('Contact:.*sip:[^>[:cntrl:]]*',
> ';nat=yes');
> > }
> > exit;
> > }
> >
> > Then, I used ngrep get packet.
> >
> > Connection Information still not Opensips SERVER of IP.
> > It's not change to my setting.
> >
> > Do you have any suggestion??
> >
> > Thanks
> > Nick
> >
> >
> >
> > 2013/3/15 Nick Khamis <symack at gmail.com <mailto:symack at gmail.com>>
> >
> >> Hello Nick,
> >>
> >> As Bogdan pointed out please look at the important parts of
> your SDP
> >> payload:
> >>
> >> sip:55688 at 61.67.128.46:5060 <http://sip:55688@61.67.128.46:5060>
> >> Contact: <sip:55688 at 211.75.166.164:5060
> <http://sip:55688@211.75.166.164:5060>>
> >> c=IN IP4 211.75.166.164
> >>
> >> sip:9999 at 61.67.128.46 <mailto:sip%3A9999 at 61.67.128.46>
> >> Contact: <sip:9999 at 192.168.4.197:5060
> <http://sip:9999@192.168.4.197:5060>>
> >> c=IN IP4 192.168.4.197
> >>
> >> Kind Regards,
> >>
> >> Nick.
> >>
> >> On 3/15/13, Bogdan-Andrei Iancu <bogdan at opensips.org
> <mailto:bogdan at opensips.org>> wrote:
> >> > Hi Nick,
> >> >
> >> > But in the SDP-s received by the UACs, in the "c" line, you
> see the IP
> >> > of the other UAC and not the IP of OpenSIPS, right ?
> >> >
> >> > Regards,
> >> >
> >> > Bogdan-Andrei Iancu
> >> > OpenSIPS Founder and Developer
> >> > http://www.opensips-solutions.com
> >> >
> >> >
> >> > On 03/15/2013 03:28 AM, Nick Chang wrote:
> >> >>
> >> >> Hello Bodgan
> >> >>
> >> >> 2 UACs behind the same nat, I check my routing.
> >> >>
> >> >> UAC don't route to nat_fixups.
> >> >>
> >> >> But UACs checked My OpenSIPS private IP (10.10.12.111), Not
> Public IP.
> >> >>
> >> >> I don't know why? Do you have any suggestion??
> >> >>
> >> >> My Config
> >> >>
> >> >> route[generic_relay] {
> >> >>
> >> >> xlog("L_NOTICE","3 invite $si");
> >> >>
> >> >> # for INVITEs enable some additional helper routes
> >> >>
> >> >> #---- Helper route, if nat=yes in the R-URI set
> flag 6 ----#
> >> >>
> >> >> #---- This is used to Process REINVITES
> ----#
> >> >>
> >> >> if (subst_uri('/((sip:.*)||(sip:.*:.*));nat=yes/\1/')){
> >> >>
> >> >> setbflag(6);
> >> >>
> >> >> };
> >> >>
> >> >> #---- If caller(flag 5) or callee(flag 6) are behind
> NAT ---#
> >> >>
> >> >> #---- Call the route(6) to force the use of the RTP
> Proxy ---#
> >> >>
> >> >> if (isflagset(5) || isbflagset(6)) {
> >> >>
> >> >> route(nat_fixups);
> >> >>
> >> >> };
> >> >>
> >> >> if (!t_relay()) {
> >> >>
> >> >> sl_reply_error();
> >> >>
> >> >> };
> >> >>
> >> >> exit;
> >> >>
> >> >> }
> >> >>
> >> >> route[nat_fixups] {
> >> >>
> >> >> xlog("L_NOTICE","4 NAT FIXED - $fu call $ru ");
> >> >>
> >> >> #---- RTP Proxy handling ---#
> >> >>
> >> >> if (is_method("BYE|CANCEL")) {
> >> >>
> >> >> unforce_rtp_proxy();
> >> >>
> >> >> } else if (is_method("INVITE")){
> >> >>
> >> >> #---- Activates the RTP Proxy for the CALLEE
> ---#
> >> >>
> >> >> rtpproxy_offer();
> >> >>
> >> >> };
> >> >>
> >> >> # catch and fix replies
> >> >>
> >> >> t_on_reply("2");
> >> >>
> >> >> }
> >> >>
> >> >> Thanks
> >> >>
> >> >> Nick
> >> >>
> >> >> *From:*Bogdan-Andrei Iancu [mailto:bogdan at opensips.org
> <mailto:bogdan at opensips.org>]
> >> >> *Sent:* Friday, March 15, 2013 12:32 AM
> >> >> *To:* OpenSIPS users mailling list
> >> >> *Cc:* Nick Chang
> >> >> *Subject:* Re: [OpenSIPS-Users] two UACs behind the same nat
> >> >>
> >> >> Hi Nick,
> >> >>
> >> >> Assuming routing is possible between the 2 UACs, you need to
> double
> >> >> check that the IPs in SDP are not changed by proxy and
> points to the
> >> >> actual UACs.
> >> >>
> >> >> Regards,
> >> >>
> >> >> Bogdan-Andrei Iancu
> >> >> OpenSIPS Founder and Developer
> >> >> http://www.opensips-solutions.com
> >> >>
> >> >>
> >> >> On 03/11/2013 11:40 AM, Nick Chang wrote:
> >> >>
> >> >> Hello
> >> >>
> >> >> I have two UACs behind the same nat.
> >> >>
> >> >> A call B is OK. But it's not voice.
> >> >>
> >> >> Can everyone give me a suggestion??
> >> >>
> >> >> Thanks
> >> >>
> >> >> Nick
> >> >>
> >> >>
> >> >>
> >> >> _______________________________________________
> >> >> Users mailing list
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> <mailto:Users at lists.opensips.org <mailto:Users at lists.opensips.org>>
> >> >> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
> >> >
> >>
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> >>
> >
>
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