On Tue, 5 Mar 2002, [iso-8859-1] Clément Moreau wrote:

> Now, i want to report a 'bug' or at least a strange behavior of h323
> conntrack helper :
>
> if we use 2 pcs behind 2 NAT routers with this schematic :
>
>
>                             ________________
> PC 1 ---- NAT router 1 ===[    internet    ]=== NAT router 2 ---- PC 2
>                            [________________]
>
> if (private) IP address of PC 1 is equal to (private) IP address of PC 2,
> then we are not able to do any connections from PC 1 to PC 2, even if we
> forward the right ports to the right places.
>
> if those IP addresses are different, it works well.
>
> Is this normal ?
> (i think not because PC 1 IP address is replaced by public IP address from
> NAT router 1 in all outgoing packets)

It might be "normal" in the sense of H.323.

One could check it by a setup like this:

PC 1 ----- NAT router 1 ---- NAT router 2 --- PC 2

where neither of the NAT routers run the H.323 modules and both do only
NAT-ing/forwarding  without any filtering. In this setup if the netmeeting
session does not fail, then it is a bug in the modules. If the session
fails, then normal behaviour of H.323/netmeeting.

Regards,
Jozsef
-
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