[Freeswitch-users] REGISTER response sent to the wrong por

[Dave Horton]

I have a phone behind a firewall registering with the internal profile.  The address in the Via header is not reachable, and the FS (correctly, IMO) sends the response back to the actual sending IP address.  However, rather than sending it to the actual sending udp port, it incorrectly (again, IMO) sends it to the port advertised in the Via header.  Of course the message does not get through the firewall, and the phone keeps retransmitting the REGISTER.

Is this a bug, or am I missing something?  And is there a setting where I can force the behavior that I want (which is: send responses to the sending address:port if the sending address:port is different than the Via header).

Trace below..


recv 481 bytes from udp/[66.37.97.53]:1024 at 19:28:12.445081:
   ------------------------------------------------------------------------
   REGISTER sip:65.162.239.204 SIP/2.0
   Via: SIP/2.0/UDP 10.93.14.119:5064;branch=z9hG4bK-e73de4bf
   From: "1002" <sip:1002 at 65.162.239.204>;tag=7718f2af7f3dcc73o2
   To: "1002" <sip:1002 at 65.162.239.204>
   Call-ID: 930c7e31-648ae3db at 10.93.14.119
   CSeq: 53622 REGISTER
   Max-Forwards: 70
   Contact: "1002" <sip:1002 at 10.93.14.119:5064>;expires=3600
   User-Agent: Linksys/SPA962-5.2.8(SC)
   Content-Length: 0
   Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
   Supported: replaces
   
   ------------------------------------------------------------------------
send 671 bytes to udp/[66.37.97.53]:5064 at 19:28:12.445259:
   ------------------------------------------------------------------------
   SIP/2.0 401 Unauthorized
   Via: SIP/2.0/UDP 10.93.14.119:5064;branch=z9hG4bK-e73de4bf;received=66.37.97.53
   From: "1002" <sip:1002 at 65.162.239.204>;tag=7718f2af7f3dcc73o2
   To: "1002" <sip:1002 at 65.162.239.204>;tag=t1m9emDKB4trF
   Call-ID: 930c7e31-648ae3db at 10.93.14.119
   CSeq: 53622 REGISTER
   User-Agent: FreeSWITCH-mod_sofia/1.0.head-git-25c725c 2011-06-30 18-30-24 -0500
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE
   Supported: timer, precondition, path, replaces
   WWW-Authenticate: Digest realm="65.162.239.204", nonce="7e426985-2f7a-40ff-a817-6c167207853f", algorithm=MD5, qop="auth"
   Content-Length: 0