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<DIV><FONT face=Arial size=2>Hi,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>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?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>#<BR>U 195.226.252.124:30150 ->
192.168.3.29:5060<BR> REGISTER sip:sip.abc.com SIP/2.0..Via: SIP/2.0/UDP
192.168.5.2:5060..From: <sip:6701892@si<BR>
p.abc.com;user=phone>..To:
<sip:6701892@sip.abc.com;user=phone>..Call-ID: <A
href="mailto:1781909739@1">1781909739@1</A><BR> 92.168.5.2..CSeq: 1
REGISTER..Contact: *..Expires: 0..User-Agent: Cisco ATA v2.15 ata18x
(0209<BR> 27a)..Content-Length: 0....<BR>#<BR>U 192.168.3.29:5060 ->
195.226.252.124:5060<BR> SIP/2.0 401 Unauthorized..Via: SIP/2.0/UDP
192.168.5.2:5060;received=195.226.252.124..From: <s<BR>
ip:6701892@sip.abc.com;user=phone>..To:
<sip:6701892@sip.abc.com;user=phone>;tag=d907c<BR>
037823644515dfe0ede38ca9976.9b53..Call-ID: <A
href="mailto:1781909739@192.168.5.2..CSeq">1781909739@192.168.5.2..CSeq</A>: 1
REGISTER..WWW-Authen<BR> ticate: Digest realm="sip.abc.com",
nonce="3e89f40b00000000e3fd8eedb58e5662ca62981749bb0006<BR> ",
algorithm=MD5..Server: Sip EXpress router (0.8.10 (i386/linux))..Content-Length:
0..Warning:<BR> 392 192.168.3.29:5060 "Noisy feedback tells:
pid=10613 req_src_ip=195.226.252.124 in_uri=sip:s<BR> ip.bmx-inc.com
out_uri=sip:sip.abc.com via_cnt==1"....<BR></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Bo</DIV></FONT></BODY></HTML>