Just to give more information on the below problem...This is what I saw in the xlite diagnostic log...Does the warning at the timeoue message mean something to anyone??

Thanks again, Aisling.

SEND TIME: 325416584 SEND >> 84.203.148.14:5060 REGISTER sip:84.203.148.14 SIP/2.0 Via: SIP/2.0/UDP 157.190.70.231:5061;rport;branch=z9hG4bK7BFAD25591E34485B5C67454E24B9B EB From: Aisling O' Driscoll sip:2000@84.203.148.14;tag=1976120825 To: Aisling O' Driscoll sip:2000@84.203.148.14 Contact: "Aisling O' Driscoll" sip:2000@157.190.70.231:5061 Call-ID: 2B12EE2F1DA64C11984134EF0CE89DC1@84.203.148.14 CSeq: 5729 REGISTER Expires: 1800 Max-Forwards: 70 User-Agent: X-Lite release 1103m Content-Length: 0

RECEIVE TIME: 325434169 RECEIVE << 84.203.148.14:5060 SIP/2.0 408 Request Timeout Via: SIP/2.0/UDP 157.190.70.231:5061;rport=5061;branch=z9hG4bKFDD40D52818B4721AF5F83D30 A7D526F From: Aisling O' Driscoll sip:2000@84.203.148.14;tag=3316651270 To: Aisling O' Driscoll sip:2000@84.203.148.14;tag=a6a1c5f60faecf035a1ae5b6e96e979a-a63b Call-ID: E8E25C47488A4E958F4BE8293AF7E1F3@84.203.148.14 CSeq: 16015 REGISTER Server: Sip EXpress router (0.8.14 (i386/linux)) Content-Length: 0 Warning: 392 172.16.3.15:5060 "Noisy feedback tells: pid=19819 req_src_ip=157.190.70.231 req_src_port=5061 in_uri=sip:84.203.148.14 out_uri=sip:84.203.148.14 via_cnt==0"

---- Original Message ---- From: ashling.odriscoll@cit.ie To: serusers@iptel.org Subject: FW: SER and NAT Date: Fri, 21 Jan 2005 09:49:56 -0000

Hi,

Hope someone can help me. I have a fairly bad NAT situation.

Clients are behind NAT and SER is behind NAT. The idea is that the clients will register to the public address which is assigned to my router and I have enable port-forwarding to send the packets onto the pc running SER listening on 5060. This situation worked when clients registered with Asterisk but I would rather them to register with SER and just use Asterisk for voicemail etc.

My config is like the default except the nathelper and mysql modules are loaded. I have looked at the following websites but all the configs are very different and use different rtp proxys..I am also confused as to how much configuration is required to accommodate nat

http://lists.cs.columbia.edu/pipermail/sip-implementors/2004-February/ 006179.html http://voip-info.org/wiki-SER+example+NAThelper

Could someone give me an idea of how the script should be modified, what else must be installed (rtp proxy wise)or any ideas as to why my clients cant register?....Im presuming its nat...

Thanks a million, Aisling.

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