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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Have you considered using IAX instead of SIP? IAX2 is a VoIP
protocol that carries both signaling and media on the same port: <a
href="http://en.wikipedia.org/wiki/Inter-Asterisk_eXchange">http://en.wikipedia.org/wiki/Inter-Asterisk_eXchange</a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] <b>On Behalf Of </b>mosbah.abdelkader<br>
<b>Sent:</b> Thursday, February 11, 2010 8:37 AM<br>
<b>To:</b> asterisk-users@lists.digium.com<br>
<b>Subject:</b> [asterisk-users] SIP tunnel<o:p></o:p></span></p>
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<p class=MsoNormal>Hello,<br>
<br>
<br>
<br>
I have the following situation: A firewall is blocking all SIP and RTP traffic
in the side of some of my clients. My clients cannot change settings of the
firewall.<br>
<br>
<br>
<br>
I need to solve this problem and I need some help from you.<br>
<br>
<br>
<br>
I have this idea: implement a SIP user agent which does not use well known SIP
ports (uses http port 80 for example) and use other ports that are not blocked
by the firewall for RTP (FTP, https, ssh, ...ports). Then, configure Asterisk
to use the same ports to interact with the client.<br>
<br>
<br>
<br>
Is this idea feasible? if not what are the problems? please give me your
opinions about the situation?<br>
<br>
<br>
<br>
Thank you.<o:p></o:p></p>
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