[SR-Users] Problem with t_relay() and VPN tunnel

[Carlos Ruiz Diaz]

The IP: *192.168.2.102 *corresponds to address in LAN *A*, *10.8.0.1* is the
VPN address of the same machine in the *A* network. Switching from one to
another still results in Perl script working and Kamailio not working.

On Thu, Aug 5, 2010 at 7:48 PM, Carlos Ruiz Diaz
<carlos.ruizdiaz at gmail.com>wrote:

> Hi,
>
> I have two SIP servers, *A* and *B*, connected each other though a OPENVPN
> tunnel. The server *B* needs to t_relay() every SIP message containing the
> method MESSAGE to the server *A* but these messages never reach
> destination.
>
> I have tested the tunnel connectivity and works fine. I wrote a Perl
> script  (located in *B*) that sends SIP MESSAGES to Kamailio (located in *
> A*) trying to figure out what is happening but these messages are received
> by *A* and processed correctly but when *B* does the same from Kamailio,
> it is never received.
>
> Here is the route part of kamailio.cfg in *B*:
>
> Observation: ($rU == "1004") result is *true*
> *
>  if(is_method("MESSAGE"))
>  {
>             if($rU == "1004")
>              {
>                         xlog("L_INFO","En 1004");
>
>                         rewritehost("10.8.0.1");
>
>                         if (!t_relay())
>                                 xlog("L_INFO","MIO Error en t_relay");
>
>                         t_reply("200", "Ok");
>                         xlog("L_INFO","MIO despues rewrite");
>                         exit;
>              }
> .....*
>
> The perl script that WORKS:
>
> *$msg = 'MESSAGE sip:1004 at 192.168.1.2:5060 SIP/2.0
> Via: SIP/2.0/UDP 192.168.1.2
> From: "2002" <sip:2002 at 192.168.1.2 <sip%3A2002 at 192.168.1.2>
> >;tag=1837944796
> To: <sip:1004 at 192.168.1.2 <sip%3A1004 at 192.168.1.2>>
> Call-ID: 19722852989 at 192.168.1.2
> CSeq: 15773 MESSAGE
> Contact: <sip:2002@**PublicIP-protected**:5060>
> Max-Forwards: 29
> User-Agent: DBL
> Content-Type: text/plain
> Content-Length:    34
>
> +595981[protected]
> hello from kamailio
> ';
>
> use IO::Socket;
>
> my $sock = IO::Socket::INET->new( Proto=>'udp',
>                                   PeerHost=>'192.168.2.102',
>                                   PeerPort=>'5060');
>
> print "Sending msg $msg\n";
>
> $sock->send($msg) or die "error sending $!\n";
>
> *Please help!
>
> Thanks in advance.
>
> Carlos.
>
>
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