I recently re-installed ISA, in dual mode. On the previous install, also dual mode, after using the VPN wizard my client VPN to an outside VPN server worked fine, including with a certificate for authentication. Since the new install it will only work if a username and password are specified. The certificate no longer works. It sits at the point of connecting that the VPN server would normally connect back. Then it times out as the server did not respond. Turn back on username and password and it works fine again. The certificate works fine if outside the ISA server. Any one have any thoughts on what I might have missed for this? Thanks. Best Regards, Dan Bartley