Vivienne,

From your config:

if (nat_uac_test("3")){

if (method == "REGISTER" || ! search("^Record-Route:")){

log("Log: Someone trying to register from private IP,rew

riting\n");

fix_nated_contact(); #Rewrite contact with source IP

if (method == "INVITE"){

fix_nated_sdp("1"); #Add direction=active to SDP

};

force_rport(); # Add rport parameter to topmost Via

setflag(6); # Mark as Nated

};

Here you don't proxy the call, you just add the direction=active. If you want to rtp proxy the calls, you need to have a force_rtp_proxy() for the initial INVITE. Read section 1 of the Getting Started document at ONsip.org to understand what is supposed to happen and how to read the SDP payload and see the rtpproxy example found in the document.

Your config will process the OK and proxy the rtp stream from the callee, but not the caller's.

g-)

---- Original Message ---- From: Vivienne Curran To: serusers@lists.iptel.org Sent: Thursday, March 31, 2005 05:55 PM Subject: [Serusers] Nathelper/Rtpproxy not working for two natted clients

Hi,

I am having problems troubleshooting a problem I am experiencing with my SER configuration. I have ser 0.8.14 running with rtpproxy and nathelper enabled. I have two phones on the same subnet behind nat and I would like to make a call between the two. I want to invoke rtpproxy for this as they both have private address [I know this isn't the most efficient way as they're both on the same subnet but I can worry about that later].

When I ring from the phone 1 (2092) to phone 2 (2093), 2092 can hear voice but 2093 can't. When 2093 ring 2092, there's no audio. These phones are Grandstream BT100's. They have been configured to listen on different SIP and RTP ports.

2092: SIP Port: 5060 2092: RTP Port: 5004 2093: SIP Port: 5061 2093: RTP Port: 5005

I have included my ser.cfg file the messages received on my SER server (using ngrep SIP-q)in an attachment. I can confirm that my rtpproxy is working (originally I thought it wasn't) by using "strace -d <rtpproxy pid> -f -F". I can see a signal being returned.

Any help would be appreciated or advise as to how I can proceed troubleshooting. Kindest Regards, Vivienne. Send instant messages to your online friends http://uk.messenger.yahoo.com

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