I installed Microsoft Internet Connection Sharing (ICS) so that all of my systems can reach the Internet. Now my VPN client no longer works.

The reason for this is that the Microsoft ICS uses Network Address Translation (NAT) to get the Internet connection, and NAT, which may not support IPSec connections.

The only way around this currently, is to make the unit running the ICS be the one you run your VPN connection from. Any downstream unit will not be functional for VPN.


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