I have a client application on my intranet that receives multicast packets. Since ISA server is a gateway for my network i couldn't find a way to allow multicast transfer. ISA server 2004 run on Windows 2000 box If i enable IGMP on RRAS , proxy on External interface and Routing on internal , can be my solution ? Except that, is smth else to do on access policies on ISA server? Thnx in advance