[Kamailio-Users] Kamailio 1.5.0 and NAT

[Klaus Darilion]

force_rport();
http://www.kamailio.org/dokuwiki/doku.php/core-cookbook:1.5.x#force_rport

regards
klaus

Путято Денис schrieb:
> Hello everybody
> 
>  
> 
> I have such problem with kamailio and client which behind NAT
> 
>  
> 
> This is REGISTER message which came from client. This message came from 
> public IP (for example, 1.1.1.1) and source port 44197. (This 
> information I got from sip_trace)
> 
>  
> 
> REGISTER sip:sip.ptl.ru:5060;transport=UDP SIP/2.0
> 
> From: <sip:xxxxxxx at sip.ptl.ru:5060>;tag=a82eda3-13c4-47798948-1a1296-5259a46
> 
> To: <sip:xxxxxxx at sip.ptl.ru:5060>
> 
> Call-ID: a82eda3-13c4-47798948-1a1296-9641c88 at sip.ptl.ru
> 
> CSeq: 446229198 REGISTER
> 
> Via: SIP/2.0/UDP 10.130.237.163:5060;branch=z9hG4bK-47799e27-6b9841-84448db
> 
> Max-Forwards: 70
> 
> Supported: timer
> 
> Contact: <sip:xxxxxxx at 10.130.237.163:5060;transport=UDP>
> 
> Expires: 60
> 
> Content-Length: 0
> 
>  
> 
> This is Unauthorized message was sent by kamailio to 1.1.1.1 and… 
> destination port not 44197 (as I expected) but 5060!!!
> 
>  
> 
> SIP/2.0 401 Unauthorized
> 
> From: <sip:xxxxxxx at sip.ptl.ru:5060>;tag=a82eda3-13c4-47798948-1a1296-5259a46
> 
> To: <sip:xxxxxxx at sip.ptl.ru:5060>;tag=fdc454a3cdd8f9e5718382b74f33aeed.3b81
> 
> Call-ID: a82eda3-13c4-47798948-1a1296-9641c88 at sip.ptl.ru
> 
> CSeq: 446229198 REGISTER
> 
> Via: SIP/2.0/UDP 
> 10.130.237.163:5060;branch=z9hG4bK-47799e27-6b9841-84448db;received=1.1.1.1
> 
> WWW-Authenticate: Digest realm="domain name", 
> nonce="4af0129b000000047c1020258f9f0efc4de1b76663dd2ab4"
> 
> Server: Kamailio (1.5.0-notls (i386/linux))
> 
> Content-Length: 0
> 
>  
> 
> And as you understand 401 reply, which was sent to 1.1.1.1:5060 can’t 
> reach client’s equipment.
> 
>  
> 
> A piece of kamailio.cfg relating to REGISTER processing:
> 
> route(0) {
> 
> ….
> 
> if (!is_method("INVITE")) route(8);
> 
> ….
> 
>    if (is_method("REGISTER")) {
> 
>     route(11);
> 
>     exit;
> 
>  }
> 
> …..
> 
> }
> 
> route(8) {
> 
>             if (nat_uac_test("5")) {
> 
>               if (method=="REGISTER") {
> 
>                 fix_nated_register();
> 
>           } else {
> 
>                 fix_nated_contact();
> 
>          }
> 
>         setflag(5);
> 
>         }
> 
>         return;
> 
> }
> 
> route(11) {
> 
>         if (!www_authorize("", "subscriber")) {
> 
>             www_challenge("", "0");
> 
>                 exit;
> 
>          }
> 
>             if ($au!=$tU)  {
> 
>            sl_send_reply("403","Forbidden auth ID");
> 
>             exit;
> 
>             }
> 
>         if (isflagset(5)) setbflag(6);
> 
>         if (!save("location")) {
> 
>             sl_reply_error();
> 
>             exit;
> 
>          }
> 
> }
> 
>  
> 
> Hearty thanks for any help.
> 
> 
> ------------------------------------------------------------------------
> 
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