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<font size="-1"><font face="Trebuchet MS">Thanks Ryan,<br>
so i leave the cisco router using as source IP address the
private one and the other gateway that does the NAT, has to be
aware of SIP protocol;<br>
then, it will change the source ip in the sip message that the
voice gateway sends to the ISP from the private to the real one.<br>
it is so?<br>
</font></font><br>
On 3/2/2011 18:34, Ryan Ratliff wrote:
<blockquote
cite="mid:AB989B00-B138-4E97-8131-8298FA42A776@cisco.com"
type="cite">Your device doing the NAT needs to support SIP fixup
so it modifies the internal IP to the external one inside the SIP
messages.
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<div>-Ryan</div>
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<div>On Feb 3, 2011, at 10:29 AM, Anthony Kouloglou wrote:</div>
<br class="Apple-interchange-newline">
<div bgcolor="#ffffff" text="#000066"> <font size="-1"><font
face="Trebuchet MS"> Hi, <br>
i have a 2801 and i am trying to register it with a SIP
ITSP that requires proxy authentication.<br>
Unfortunately, router is connected with it's fa0/0 to
the internet and has a private IP.<br>
This IP is full NATted on another router that connects
it to the internet.<br>
I have managed to get it registered but the local ip is
always the private one.<br>
How can i change this so that the ITSP manages to reach
me?</font></font><span style="font-size: 10pt; color:
silver;" lang="EN-US"></span><span style="font-size:
12pt;" lang="EN-US"></span>
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