Hi all,

I am trying to get nathelper + rtpproxy working but I now have a problem: "force_rtp_proxy" does not change anything in the SDP-part e.g. of INVITE.

I have attached: - my ser.cfg - the syslog output (DEBUG=3): rtpproxy_test.log

Here are my hints where to look at: - line 213 in ser.cfg contains the force_rtp_proxy() statement - line 37 in rtpproxy_test.log holds the log output of the statement before force_rtp_proxy() - below are the contents of the received and the forwarded INVITE request

I expected the IP-address and port-number of the forwarded INVITE to be modified (IP-address of rtpproxy= 192.168.20.2). Why does it not work?

I have a reverted test-scenario where ser + rtpproxy are within a private network (192.168.20.2) and I have arranged to get a INVITE from outside (62.218.76.30). But this should have no influence on force_rtp_proxy().

Any ideas?

Franz

INVITE Received by SER: ----------------------- UDP Frame 41: 192.168.20.5:5061(1) -> 192.168.20.2:5060(2)

INVITE sip:wnb@biloxi.com SIP/2.0 Via: SIP/2.0/UDP 62.218.76.30:5061;rport;branch=z9hG4bK234EE37415A64F648AE73252A5B7177E From: X-PRO sip:wpc@biloxi.com;tag=1890514130 To: sip:wnb@biloxi.com Contact: sip:wpc@62.218.76.30:5061 Call-ID: 0011D27B-A4A0-4EAF-BA7B-2942D3F4278A@62.218.76.30 CSeq: 34691 INVITE Max-Forwards: 70 Content-Type: application/sdp User-Agent: X-PRO build 1101 Content-Length: 315

v=0 o=wpc 8424093 8424093 IN IP4 62.218.76.30 s=X-PRO c=IN IP4 62.218.76.30 t=0 0 m=audio 8000 RTP/AVP 18 3 97 98 0 8 101 a=rtpmap:0 pcmu/8000 a=rtpmap:8 pcma/8000 a=rtpmap:3 gsm/8000 a=rtpmap:18 G729/8000 a=rtpmap:98 iLBC/8000 a=rtpmap:97 speex/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15

INVITE forwarded by SER ----------------------- UDP Frame 43: 192.168.20.2:5060(2) -> 192.168.20.6:5060(3)

INVITE sip:wnb@192.168.20.6:5060 SIP/2.0 Record-Route: sip:wnb@192.168.20.2;ftag=1890514130;lr=on Via: SIP/2.0/UDP 192.168.20.2;branch=z9hG4bKcc0e.f78ee5d5.0 Via: SIP/2.0/UDP 62.218.76.30:5061;received=192.168.20.5;rport=5061;branch=z9hG4bK234EE37415A 64F648AE73252A5B7177E From: X-PRO sip:wpc@biloxi.com;tag=1890514130 To: sip:wnb@biloxi.com Contact: sip:wpc@192.168.20.5:5061 Call-ID: 0011D27B-A4A0-4EAF-BA7B-2942D3F4278A@62.218.76.30 CSeq: 34691 INVITE Max-Forwards: 69 Content-Type: application/sdp User-Agent: X-PRO build 1101 Content-Length: 315 P-hint: force_rport and fix_nated_contact P-hint: session forced via RTP-Proxy

v=0 o=wpc 8424093 8424093 IN IP4 62.218.76.30 s=X-PRO c=IN IP4 62.218.76.30 t=0 0 m=audio 8000 RTP/AVP 18 3 97 98 0 8 101 a=rtpmap:0 pcmu/8000 a=rtpmap:8 pcma/8000 a=rtpmap:3 gsm/8000 a=rtpmap:18 G729/8000 a=rtpmap:98 iLBC/8000 a=rtpmap:97 speex/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15