Re: [AG-TECH] Access Grid 3.0 beta1 available !

[Colin Perkins <csp@csperkins.org>]

On 30 Jan 2006, at 21:17, Nagykaldi, Zsolt F. (HSC) wrote:
> 2 comments:
>
> 1) Win XP SP2 indeed self-configures the client machine firewall  
> for the AG Toolkit. The problem is that most Universities have a  
> group policy to overtake individual firewall control (usually they  
> turn it off) when the PC is connected to the local network. This  
> renders local settings void and only central settings count.
> 2) Interestingly, RAT almost always works (apart when clients have  
> "local " IPs assigned by PIX, where port forwarding or dedicated IP  
> address assignment help only), but VIC almost never works just by  
> installing the Toolkit behind regular firewalls. This tells me that  
> in the case of VIC, the connection is actually initiated by the  
> server (???) and since many networks specifically block INBOUND  
> connections, VIC can not receive incoming video, while RAT is fine  
> (client initiates connection??). This would explain why in many  
> cases parties can talk and may be visible on one side, but can not  
> receive video on the other (ominous "waiting for video..."  
> message). I wonder whether something could be done regarding this  
> specific problem (i.e. can VIC work like RAT in this regard).
Rat typically uses the same port at source and destination, vic  
doesn't. This is likely why rat works through firewalls which vic  
doesn't.

Colin