Re: Firewall traversal with explicit IP address calls

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Hi,

The proper setup is similar to what Carlos described:
One gatekeeper in the DMZ that is neighbored with a second gatekeeper
inside and both are using H.460.18/.19 to tunnel calls in and out.

Regards,
Jan

Vineet Menon wrote:
> Hi,
> 
> This is the exact thing what I want to do at my organization too... So, thx
> for asking this question.
> 
> Now, I have a firewall with a ALG for H.323 calls. Enabling that at the
> firewall and using gnugk in -rr mode (H.245 Routed) makes it possible for
> me to call remote end, and FYI I have only one GK inside the network.
> 
> If anyone has any better solution please post it here!!
> 
> 
> Regards,
> 
> Vineet Menon
> 
> 
> 
> 
> On 1 February 2012 14:07, Carlos Elotro <el.otro.carlos@xxxxxxxxx> wrote:
> 
> > Hi,
> >
> > In our organization we have some video conference systems connected to the
> > internal network,  and we are trying to configure a H.323 proxy to allow
> > then to communicate with VC systems outside our organization through the
> > Internet. To connect to then, our endpoint will dial the IP address of the
> > destination.
> >
> > We have placed a GnuGk in the DMZ network, and another one in the internal
> > network, so the endpoints register to the internal gatekeeper, and the
> > internal gatekeeper forwards the internet traffic to the external one.
> >
> > We have set then as H.460.18 client/server using the [Neighbor:] section,
> > and we have enabled H.460.18 in [RoutedMode] and RTPMultiplexing in
> > [Proxy], because we want to open as little ports in the firewall as
> > possible.
> >
> > But the only way we have found so far to forward the calls with explicit
> > external IPs from the internal to the external is setting the external as
> > parent of the internal one, by using the [Endpoint] clause, and when we use
> > this routing, it seems like it doesn’t use H.460.18 and RTPMultiplexing, so
> > we have to open a lot of ports in the firewall.
> >
> > Please, could someone help me to find a configuration that allow route
> > explicit IP calls through the external gatekeeper using H.460.18 and
> > RTPMultiplexing?
> >
> > Thank you very much in advance,
> >
> > C.B.

-- 
Jan Willamowius, jan@xxxxxxxxxxxxxx, http://www.gnugk.org/

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