1. Log into WinGate with GateKeeper
2. double click on the Extended Networking icon in the left hand panel
3. Select "Port Security.
4. Select "LAN Connections to Internet", and "TCP"
5. Click the "Add" button.
6. Enter the port numbers 6891 to 6900 and choose "deny"
7. Click OK, then OK.
You should now be blocking outbound to destination ports 6891 - 6900