1) No.
2) It adds some overhead, but with novadays machines this is not a
bottleneck usually.
3) Using non standard ports (both for RAS and signalling) solves the problem
with routers that mess up with H.323.
----- Original Message -----
From: "Raschel" <raschel@xxxxxx>
Sent: Saturday, March 26, 2005 9:32 AM
> Dear all,
>
> with NATedEndpoint Section we was able to fix most of the common
> NAT-Router
> problems. Please allow me some more questions about this.
>
> 1.) is it possible to treat every client as NATedEndpoints in general with
> [NATedEndpoints]
> *=true
>
> 2.) i realized that it doesn´t matter whether a NAT-Router is Bogus or
> not,
> all Routers are working with a Phone setup as NATedEnpoints
> but what would happen if a real public Endpoint is setup as NATedEndpoint
> and
> does the rewriting cause a heavy processing overhead?
>
> 3.) With registering at 1719 it is obviously not possible to recognize a
> NAT
> Router which is rewriting the packets and claims to be a public Endpoint.
>
> For that it is not possible for gnugk to treat the Endpoint as a NAT
> Endpoint and at the Channel Setup the packets are not rewritten from
> private
> to public ip which cause a faulty connection. Please correct me if i am
> not
> right.
>
> So obviously there must be a stage where packets are exchanged which
> negotiate with a private IP. (Q.931/H.225/H245 ???)
>
> Isn´t it possible to initiate such a negotiation once at registration
> stage
> to detect automatically that the Enpoint is behind a NAT Router ?
>
> 4.) With the growing circulation of SIP this problem might occur more and
> more because SIP has exactly the contrary problem. With many Providers it
> would not work if the router doesn´t rewrite the packets. For that many
> Router manufacturers decide to rewrite SIP and H.323, but unfortunately
> not
> completely at the higher layers. (could the use of 1721 instead of
> standard
> 1720 maybe force this problem?)
>
> For explanation a thx in advance
>
> TOM
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