2 Apr
2003
2 Apr
'03
1:07 a.m.
Yes, it's a work around, but not a solution.
Thanks.
----- Original Message -----
From: Ricardo Villa
To: Bo
Cc: serusers(a)lists.iptel.org
Sent: Tuesday, April 01, 2003 3:13 PM
Subject: Re: [Serusers] Strange response
Westell DSL routers also change the source port. Thats why you need to forward port
5060 on the NAT device to the ATA.
----- Original Message -----
From: Bo
To: serusers(a)lists.iptel.org
Sent: Tuesday, April 01, 2003 2:25 PM
Subject: [Serusers] Strange response
Hi,
I have tested cisco ATA186 (private IP) with SER under different circumstances. With
Linksys and D-link router, there were no problem. But with Lioncom ADSL router, a strange
thing happened. In this case, the ATA is having a private IP 192.168.5.2 and the SIP port
number is the default 5060. The public IP of the ADSL connection was 195.226.252.124. The
following is the traces from ngrep. As you can see, the Lioncom router forwarded (NAT) the
SIP REGISTER with port 30150 while SER sent the response back to port 5060. So the ATA
couldn't receive the response at all. What maybe the problem?
#
U 195.226.252.124:30150 -> 192.168.3.29:5060
REGISTER sip:sip.abc.com SIP/2.0..Via: SIP/2.0/UDP 192.168.5.2:5060..From:
<sip:6701892@si
p.abc.com;user=phone>..To: <sip:6701892@sip.abc.com;user=phone>..Call-ID:
1781909739@1
92.168.5.2..CSeq: 1 REGISTER..Contact: *..Expires: 0..User-Agent: Cisco ATA v2.15
ata18x (0209
27a)..Content-Length: 0....
#
U 192.168.3.29:5060 -> 195.226.252.124:5060
SIP/2.0 401 Unauthorized..Via: SIP/2.0/UDP
192.168.5.2:5060;received=195.226.252.124..From: <s
ip:6701892@sip.abc.com;user=phone>..To:
<sip:6701892@sip.abc.com;user=phone>;tag=d907c
037823644515dfe0ede38ca9976.9b53..Call-ID: 1781909739@192.168.5.2..CSeq: 1
REGISTER..WWW-Authen
ticate: Digest realm="sip.abc.com",
nonce="3e89f40b00000000e3fd8eedb58e5662ca62981749bb0006
", algorithm=MD5..Server: Sip EXpress router (0.8.10
(i386/linux))..Content-Length: 0..Warning:
392 192.168.3.29:5060 "Noisy feedback tells: pid=10613
req_src_ip=195.226.252.124 in_uri=sip:s
ip.bmx-inc.com out_uri=sip:sip.abc.com via_cnt==1"....
Thanks,
Bo