I'm not a VPN nor a windows server guru here... But, I have VPN services running and was originally using IPSec Policies for a firewall.

However, I am not able to allow port 500 via IPSec Policy (which I beleive is IPSec) in order to allow for authentication during a VPN connection.

Is there something I can do or am I going to need to install a 3d party firewall?