I have setup ISA server to be able to allow incomming vpn calls and outgoing vpn calls, and it works fine, now i have clients on the internal network that need to vpn into a cisco vpn server on a remote network that uses ipsec. When the client tries to connect to the remote network from behind ISA, it gets all the way to the point where it says "Authenticating", and then it fails. Is there anything i can do on my end to let these clients authenticate with this cisco vpn server. Thanks .