[Asterisk-Users] Problem setting SIP incoming/outgoing

[Zafar Kazmi]

Hi

I am a newbie to * and I am having a problem which appears strange as I did
not find any mention of it anywhere in my search.

Simply speaking, I have an external SIP proxy server which I am trying to
configure for incoming and outgoing calls from my asterisk installation. So
here is my configuration in sip.conf

[general]
register => user:secret:user at sipserver.com:8080

as long as I have just the above entry, I am able to receive incoming calls.
Now I would like to setup outgoing calls too. So I create a new section in
sip.conf

[sipserverout]
type=peer
secret=secret
username=user
fromuser=user
fromdomain=sipserver.com
host=sipserver.com
port=8080
context=default

with the above configuration I can successfully dial out using
dial(SIP/{$EXTEN}@sipserverout)

but now when I call my incoming number, I get a busy or invalid number
signal. If I coment out sipserverout section, I could receive incoming calls
again.

So I turned on sip debug on CLI. and it appears to me that the following is
happening. astreisk takes the incoming call and tries to match it with a
section with the same hostname. Now the reverse IP lookup on 109.147.41.48
return sipserver.com (which is correct), so it is trying to send the call to
sipserverout which is essentially back to the same server where it came from
(Notice the statement "Found peer 'sipserverout'" in the sip debug logs
below). This creates an endless loop and the equipment at the other end
terminates the call.

According to all the examples I have seen, my setup is the correct setup and
everyone seems to be using it. but it does not work for me. I am deperately
looking for a solution. Please help.

I am using asterisk 1.2.0 beta 1 on FC1.

Here is the sip debug dump when a call is coming.

<-- SIP read from 109.147.41.48:8080:
INVITE sip:s at 66.197.70.80:5050 SIP/2.0
Record-Route: <sip:209.47.41.48:80;ftag=2C996308-10F9;lr=on>
Via: SIP/2.0/UDP 209.47.41.48:80;branch=z9hG4bK03a4.da6a926.0
Via: SIP/2.0/UDP
209.47.41.61:5060;rport=53084;x-route-tag="tgrp:sroutetor1";branch=z9hG4bK4B
B6EA6
From: <sip:0000123456 at 209.47.41.61>;tag=2C996308-10F9
To: <sip:16166739282 at 209.47.41.48>
Date: Thu, 06 Oct 2005 08:13:58 GMT
Call-ID: FADDE365-357711DA-80F5C727-E0F535F0 at 209.47.41.61
Supported: timer
Min-SE: 1800
Cisco-Guid: 4208765565-896995802-2793406481-2459445924
User-Agent: Cisco-SIPGateway/IOS-12.x
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER
CSeq: 101 INVITE
Max-Forwards: 4
Remote-Party-ID:
<sip:0000123456 at 109.147.41.48>;party=calling;screen=yes;privacy=off
Timestamp: 1128586438
Contact: <sip:0000123456 at 109.147.41.48:53084>
Expires: 180
Allow-Events: telephone-event
Content-Type: application/sdp
Content-Length: 369
hint: NAThelper
hint: SDP rewritten
hint: usrloc applied
hint: NAT...

v=0
o=CiscoSystemsSIP-GW-UserAgent 5168 3221 IN IP4 209.47.41.61
s=SIP Call
c=IN IP4 109.147.41.48
t=0 0
m=audio 53870 RTP/AVP 0 8 18 3 101
c=IN IP4 109.147.41.48
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=yes
a=rtpmap:3 GSM/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=direction:passive
a=nortpproxy:yes

--- (26 headers 16 lines)---
Using INVITE request as basis request -
FADDE365-357711DA-80F5C727-E0F535F0 at 209.47.41.61
Sending to 109.147.41.48 : 80 (non-NAT)
Found peer 'sipserverout'
Reliably Transmitting (no NAT) to 209.47.41.48:80:
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 209.47.41.48:80;branch=z9hG4bK03a4.da6a926.0
Via: SIP/2.0/UDP
209.47.41.61:5060;x-route-tag="tgrp:sroutetor1";branch=z9hG4bK4BB6EA6
From: <sip:0000123456 at 109.147.41.48 >;tag=2C996308-10F9
To: <sip:16166739282 at 109.147.41.48 >;tag=as1b7fff99
Call-ID: FADDE365-357711DA-80F5C727-E0F535F0 at 209.47.41.61
CSeq: 101 INVITE
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY
Contact: <sip:s at 66.197.70.80:5050>
Proxy-Authenticate: Digest realm="asterisk", nonce="6d00a83d"
Content-Length: 0


---
Scheduling destruction of call
'FADDE365-357711DA-80F5C727-E0F535F0 at 209.47.41.61' in 15000 ms

<-- SIP read from 109.147.41.48:8080:
ACK sip:s at 66.197.70.80:5050 SIP/2.0
Via: SIP/2.0/UDP 109.147.41.48:8080;branch=z9hG4bK03a4.da6a926.0
From: <sip:0000123456 at 109.147.41.48>;tag=2C996308-10F9
Call-ID: FADDE365-357711DA-80F5C727-E0F535F0 at 209.47.41.61
To: <sip:16166739282 at 109.147.41.48>;tag=as1b7fff99
CSeq: 101 ACK
User-Agent: Phone Server 1
Content-Length: 0