ISA Firewall Site to Site VPN Quick Fix
If you’ve been trying to create a site to site VPN using 2004 ISA firewall using a pre-shared key only, I feel your pain. You’ve probably seen that it doesn’t work. The key is to not configure the pre-shared key in the Remote Site Wizard. Instead, leave the pre-shared key checkbox unchecked. Then click the VPN Clients tab in the Details pane, and click the Select Authentication Methods link on the Tasks tab in the Task Pane. On the Authentication tab in the Virtual Private Networks (VPN) dialog box, put a checkmark in the Allow customer IPSec policy for L2TP … Continue reading ISA Firewall Site to Site VPN Quick Fix