Windows Firewall Enabled by Default
Windows Firewall is enabled by default in Vista, Server 2003, Server 2008, and Server 2012.
If you install Historian on any of the given systems, you will be prompted to allow Historian to reconfigure the Windows Firewall. If you answer Yes, Historian is added to the firewall's exception list and set to Enabled. If you answer No, Historian is added to the list and set to Disabled. You can change this setting through the Windows Firewall control panel at any time.