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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi there<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have got a really strange issue and my problem is not that
it is not working, but why it is working.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have Asterisk set up on a public IP, but the clients are
behind a Port Restricted NAT with no support for UPnP. My clients dial into a
meetme conference. When I don't specify nat=yes in the sip.conf file, then it
works?? But not sure why it works because I cannot find any reference to the IP
of the NAT in the SIP messages. I have not put in any nat support in my custom
built client either.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The reason that this is a problem is I a not sure if it will
work on other LANs, and also find it hard to debug if it is working when my
research tells me that it should not be working.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I tried putting in nat=yes in the sip.conf file, and
asterisk then rewrites the sip message with the IP of the Nat and the external
port. It still works, but only if there is a constant flow of rtp traffic. If
there is a break in the traffic, then the connection is lost. However, this
problem may be to do with the fact that pinging is disabled on our network, but
not sure.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am really stuck here. I have read that dealing with NATs
can be a big problem, but it seems to work better when I don’t put in any
NAT support. Am I missing something here? Does anyone have any ideas or advice?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Many thanks<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Steven<o:p></o:p></span></font></p>
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