Dear all, I appreciate if anyone can shed me some lights on router-to-router VPN configuration issue. I have configured two separate networks and each of the network is configured as follows: LAN_A: Server_A (installed with ISA & VPN) IP: 172.16.112.1 / Mask: 255.255.255.0 LAN_B: Server_B (installed with ISA & VPN) IP: 192.168.0.1 / Mask: 255.255.255.0 In LAN_B Server_B machine, I have ran the "Configure a Local Virtual Private Network (VPN)" wizard provided by ISA to generate a .vpc file successful, then copy the .vpc file for remote network (i.e. LAN_A ) Server_A machine to finish installation of the remote part of the router-to-router VPN (by running the Configure a Remote Virtual Private Network (VPN)" wizard. After both local and remote VPN routers are configured, it works OK to ping a remote network machine ONLY from the Server_B (i.e. local VPN server), however, none of other networked desktops in LAN_B can ping any of the remote network machines. I have added all static routes for remote network (i.e. IP:172.16.112.0 / Mask:255.255.255.0 to all interfaces) but still have no luck for any of local networked desktops to ping any of the remote network machines. When I type tracert 172.16.112.5 from a machine (i.e. with IP 192.168.0.5) in network B, it gets response from 192.168.0.1 but nothing after this IP address. None of other desktops in LAN_B can access LAN_A excepted for the local VPN server itself . Do you know what should I do to make it to work? Any information is greatly appreciated. Many thanks in advance