Quote Originally Posted by Jochi Khan
So, why have I not had a problem hosting before? All I have ever had to do with my firewalls is set them to 'Allow' or 'Not block' the servers that I am connecting to.
Is Windows Firewall turned on and Windows Automatic Updates enabled? If so, maybe an automatic update changed the Windows Firewall configuration. I have Windows Firewall turned on, but Windows Automatic Updates turned off. If you go to Control Panel then Security Center, you'll see if it's turned on. Access the Windows Firewall under Manage Security Settings, and check under the Exceptions tab to see if Medieval_TW is checked as an exception. There is also a check box there to display a message when Windows Firewall blocks a program. In Windows Firewall, you can't allow or block servers. You allow ports or programs.

I don't know anything about Zone Alarm, but if it has an automatic update feature, the configuration could have changed or the program could have become incompatible with MTW/VI. We'd have to hear from someone who can host and is running the same version of Zone Alarm on the same version of Windows to rule out incompatibility.