Hi, I am configuring a Cisco 3005 VPN concentrator for PPTP vpn for my users. The users are behind a Microsoft ISA 2000 firewall which is doing NAT overloading. The problem is only one user can connect the VPN box at a time. If the second user try to connect the concentrator generates a log like "access denied: connection already estabshiled with the remote peer (remote IP)".
Here is the network diagram
Users ----> ISA server (NAT overloading) ----> Concentrator.
All users are using Micosoft DUN for their PPTP connection. How can I fix this problem????
~/Dev