Re: [GnomeMeeting-list] gnomemeeting, netmeeting, lan and NAT

[Damien Sandras <dsandras seconix com>]

Le dim 19/01/2003 à 19:00, João Pedro a écrit :
> I think it's a NAT/Netmeeting related problem .
> The other day I was successfully connected with Georgi with:
> Gnomemeeting on NAT Router to Openphone on Nat Router
> on W2K , but when I changed from Openphone to Netmeeting we
> no longer were able to connect .
> Netmeeting on NAT detects the local network interface IP and I think
> it tells Gnomemeeting to connect to that address which will reach nowhere,
> of course .

That is exactly the case when Netmeeting is in the LAN, and GnomeMeeting
on the internet. Netmeetigg will send the private IP as address. The
only solution is to have a gatekeeper, or a router that supports H.323.
In conclusion, having Netmeeting working with the outside world when you
are using NAT, is a very hard task, better use GnomeMeeting in that
case.

If you have GnomeMeeting behind NAT, then you can also use RSIP or
simply IP translation and port forwarding.

But in the current case, the GnomeMeeting was on the same LAN than the
Netmeeting, so the problem was different I think.

> I think the only workaround is ( for those who use a Linux NAT Router)
> to use a Gatekeeper or to use RSIP - see paragraph 6.5 on Gnomemeeting
> FAQ .
> 
> Good luck and let us know if you succeed
> 
> J.Pedro
> jpedro vf netcabo pt
> 
> Chris Searle wrote:
> 
> >OK - here's the setup:
> >
> >Machine 1: gnomemeeting 0.94.1 running on debian.
> >
> >Machine 2: netmeeting (latest version for win 2k) running on a win 2k
> >           box on the LAN
> >
> >Machine 3: netmeeting (latest version for win 2k) running on a win 2k
> >           box over the internet
> >
> >Machine 4: netmeeting (latest version for win 2k) running on a win 2k
> >           box on the LAN
> >
> >
> >The LAN connects to the outside world thru a floppyfw firewall running
> >a 2.2 kernel with ip_masq_h323 installed.
> >
> >2 can call any of 1,2,3,4.
> >
> >4 can call any of 1,2,3,4.
> >
> >Machine 3 can receive calls from 1, 2, 4 but cannot call them (this is
> >to do with the firewall).
> >
> >Machine 2 to Machine 3 I get working sound and video both ways.
> >Machine 2 to Machine 4 I get working sound and video both ways.
> >Machine 3 to Machine 4 I get working sound and video both ways.
> >
> >Machine 1 to Machine 2 - I get a connection - but on the netmeeting
> >machine the gnomemeeting user shows up with no detected audio or
> >video. Then if I disconnect the conversation from the gnomemeeting
> >machine netmeeting hangs the win 2k box.
> >
> >Same for Machine 1 to Machine 4.
> >
> >Machine 1 to Machine 3 - I get a message about abnormal disconnection.
> >
> >So - all connections both on the LAN and thru the firewall work for
> >the netmeeting machines - but I'm getting nowhere fast with the
> >gnomemeeting machine.
> >
> >Oh - the gnomemeeting machine has a logitech quickcam express camera
> >and an old standard sound card with mic. These work. Gnome meeting can
> >see the local video and is set to send video on a connection. In fact
> >- the statistics window shows the video being sent.
> >
> >I'm lost. Any hints on how to delve further in to this would be very
> >welcome.
> >
> >Regards
> >
> >  
> >
> 
> 
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-- 
Damien Sandras <dsandras seconix com>