[AG-TECH] Using a bridge

[Fred Dech]

also, if you bridge in yourself, you can see what ports are being used
by the bridgeserver, although it may use different ports for a second
bridge... i've not tested two bridged connections for a while.
some bridgeservers have a wide range of ports that they choose, depending
on the bridge config file.  we have a bridgeserver that uses a fairly
narrow range (10 ports to choose from).  let me know if you still have
problems today and you can test on our venueserver with our
bridgeserver.

--fred

On Wed, Jul 20, 2005 at 02:11PM, Michael Braitmaier said:
> This sounds to me like a firewall issue. The student has to open his
> incoming ports which are normally blocked in firewall configurations
> (outgoing-open, incoming-blocked). Thats the reason why you get his video.
> He is sending due to open outgoing traffic, but he doesn't receive your vic
> and rat streams due to blocked incoming ports.
> He has to open a port-range of 4 ports dependent on the unicast bridge's
> configuration.
> Regarding the already opened ports in combination with the IP, he possibly
> needs to open the ports not for your computer but for the computer the
> bridge is running on.
> 
> Michael
> 
> 
> ----- Original Message ----- 
> From: "Darin Oman" <darin at ucar.edu>
> To: <ag-tech at mcs.anl.gov>
> Sent: Tuesday, July 19, 2005 10:05 PM
> Subject: [AG-TECH] Using a bridge
> 
> 
> >I'm trying to get a student at the USGS in Arizona AG-ready for a meeting
> >on Thursday. Unfortunately, there's no multicast capability there. So, I'm
> >planning to use NCSA's venue and multicast bridge. He had the firewall
> >opened there for IP 141.142.66.146, ports 30000-40000. Now, when he
> >connects to the bridge ("use unicast", I can see his video and his audio
> >pops up in RAT, but he's still not getting anything on his end. Is there
> >something I'm missing?
> >
> >Thanks,
> >Darin
> >