[cisco-voip] IP-Phones NAT problem

[Justin Steinberg]

Is there a SCCP-aware NAT feature in any IOS/feature set?

Justin

On 4/6/06, Per Carlson <lists at ip4all.net> wrote:
> On Thu, Apr 06, 2006 at 07:18:13PM +0200, Mounir Mohamed wrote:
>
> > Could you clarify more What is the FIXUP
>
> A SIP-aware NAT-implementation. When NAT-ing SIP-signalling you
> can't just change the IP-addresses/ports because the signalling
> have got IP-adresses in the payload as well.
>
> On a router you will need an IOS/feature set that both supports
> SIP-aware NAT *and* FW. You don't need to configure the FW, but
> the code is needed to do deep packet modifications.
>
> The SIP-aware NAT feature is in 12.2(something)T and newer.
>
> --
> Per Carlson, Sr. Network Developer
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