<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Your device doing the NAT needs to support SIP fixup so it modifies the internal IP to the external one inside the SIP messages.<div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div>-Ryan</div></span>
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<br><div><div>On Feb 3, 2011, at 10:29 AM, Anthony Kouloglou wrote:</div><br class="Apple-interchange-newline">
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<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; font-family: "Times New
Roman","serif";" lang="EN-US"></span>
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