Thanks for the information Klaus and Ovidiu!<div><br></div><div>It seems the 4to6.cfg file referenced is for a different version of Kamailio. I&#39;m using 3.1.0 and I was unable to get it to run with that .cfg file.</div>
<div><br></div><div>I installed Kamailio on Fedora 10 as an rpm. It runs successfully with the default configuration.</div><div><br></div><div>Also, it seems NAT is used in the 4to6.cfg file. Does this mean WITH_NAT is required in the newer version?</div>
<div><br></div><div>I&#39;d be happy to install any version that will work with the examples you have provided... which do you recommend?</div><div><br></div><div>Also, the potential for IPv6 addresses in the Via header of IPv4 clients that Klaus mentioned could be an issue... is there a way to enable topology hiding or something similar?</div>
<div><br></div><div>Thanks,</div><div>Joe</div><div><br><div class="gmail_quote">On Fri, Oct 15, 2010 at 6:37 AM, Klaus Darilion <span dir="ltr">&lt;<a href="mailto:klaus.mailinglists@pernau.at">klaus.mailinglists@pernau.at</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><br>
<br>
Am 15.10.2010 02:59, schrieb Joe Uelk:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">
Hello all,<br>
<br>
I&#39;m looking to implement the following scenario:<br>
<br>
Step 1<br>
SIP Server A sends INVITE to port 5060 over IPv6 to Kamailio:<br>
2001::1 --udp/tcp--&gt; 2001::2:5060<br>
<br>
Step 2<br>
Kamailio SIP NATs the INVITE and sends it out IPv4 to SIP Server B on<br>
port 6000<br></div>
1.1.1.1 --udp/tcp--&gt; <a href="http://1.1.1.2:6000" target="_blank">1.1.1.2:6000</a> &lt;<a href="http://1.1.1.2:6000" target="_blank">http://1.1.1.2:6000</a>&gt;<div class="im"><br>
<br>
Step 3<br>
All SIP Server B responses within this SIP dialog are sent back to SIP<br>
Server A along the same path.<br>
<br>
There is more to this but I want to accomplish this first and go from there.<br>
<br>
<br>
Can someone point me toward a resource on how to get this created?<br>
<br>
Do I need to use the WITH_NAT function in kamailio.cfg?<br>
</div></blockquote>
<br>
No. WITH_NAT is for NAT traversal of SIP clients behind NAT.<br>
<br>
If you want to operate Kamailio in IPv4-IPv6 bridging mode you only have to listen to IPv4 and IPv6 sockets. Bridging will be done automatically (by using the double-record-route feature). Maybe you have to specify mhomed=1. (multi homed).<br>

<br>
But be aware. This only covers SIP signaling. If the clients are not dual-stacked then you usually also have to v6-v4 briding for media, e.g. by using rtpproxy in bridge mode.<br>
<br>
Furher, I suspect there will be some clients which are confused if the receive a IPv6 address in contact header while using IPv4 when talking to the proxy.<br>
<br>
regards<br><font color="#888888">
klaus</font><div><div></div><div class="h5"><br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
Thanks!<br>
Joe<br>
<br>
<br>
<br>
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</blockquote>
</div></div></blockquote></div><br><br clear="all"><br>-- <br>Joe Uelk<br><a href="mailto:joe.uelk@gmail.com">joe.uelk@gmail.com</a><br>
</div>