I currently have two ISA Server 2004 systems setup that I am trying to establish Site to site vpn connections with a Netgear FVS316 VPN router. I am able to establish the connections but and I believe that the comminication is only one-way. When I am connected to a machine that is behind the Netgear, I can ping any system that is behind either of the two ISA servers. I can also ping any system that is behind the netgear from any machine that is behind either of the two ISA servers. What I cannot do is ping any system behind the netgear if I am actually on either of the two ISA servers. I believe that this a configuration issue within my ISA servers. My Netgear indicates, in the VPN status dialog, that both of my connections are established. So my question is, why can I not ping the Netgear or any machine that is behind it, when I am actually on either of the two ISA servers? It would seem to me that if I can ping the systems on the Netgear from any machine that is behind the ISA servers that I should be able to ping directly from the ISA server itself.
Any help is appreciated!