Hi!
I'm forwarding to the Gateway. I can forward it with a symmetrical cone nat now, too. But with a Port Restricted Cone NAT no... this is my last problem I hope.
Here my routing:
if (isflagset(6)) { force_rtp_proxy(); t_on_reply("2"); append_hf("P-Behind-NAT: Yes\r\n"); append_hf("P-hint: GATEWAY\r\n"); };
if (method=="INVITE") { record_route(); setflag(1); if (uri=~"sip:00") { strip(3); prefix("xxxx"); rewritehostport("xxx.xxx.xxx.xxx:5060"); }; };
...
if (!t_relay()) { sl_reply_error(); break; };
... onreply_route[2] { if (status=~"2[0-9][0-9]") { force_rport(); fix_nated_contact(); if (search("User-Agent: Cisco ATA.*")) { fix_nated_sdp("2"); }; force_rtp_proxy(); }; }
Are there any flags to be set??
Thanks!
Sebastian
----- Original Message ----- From: xwang@cascotec.com To: "Sebastian Kühner" skuehner@veraza.com Sent: Thursday, July 21, 2005 1:36 PM Subject: RE: [Serusers] NAT
"A restricted cone NAT is one where all requests from the same internal IP address and port are mapped to the same external IP address and port.
Unlike
a full cone NAT, an external host (with IP address X) can send a packet to the internal host only if the internal host had previously sent a packet
to
IP address X"
do you forward calls from SER proxy to Gateway or call to Gateway
directly?
steven
-----Original Message----- From: serusers-bounces@iptel.org [mailto:serusers-bounces@lists.iptel.org]On Behalf Of Sebastian Kühner Sent: Thursday, July 21, 2005 8:14 AM To: serusers@lists.iptel.org Subject: [Serusers] NAT
Hi!
Another problem with NAT... I hope I will solve it soon!
My rtpproxy is running and ser can connect to the rtpproxy. I can make
calls
to users that are connected to the ser server behind a NAT (Restricted
Cone
NAT and symmetrical NAT). That's working fine!!! Thanks for your help!!!
But I have the problem that if I want to call to a Cisco PSTN-Gateway,
that
I can establish the call... but I don't hear anything. The callee is
hearing
me. What is the difference between an internal user and the Gatway?? The routing for Gateway and Users is almost equal (the only difference is the "P-hint: GATEWAY").
And: I'm wondering why the communication is OK with a symmetrical NAT (Linksys) and WITHOUT rtpproxy. If I turn on the rtpproxy (with symetrical NAT) the voice stream of the Gateway isn't arriving anymore.
Any ideas?
Thanks!
Sebastian
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