Networking, Firewall, Windows
This page contains information about the ICF firewall which is activated by default in Windows operating systems.
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All Windows operating systems since Vista have come with a built-in one-way firewall called ICF (Internet Connection Firewall).
The ICF firewall is automatically active by default and you should not need to change your settings in order to activate it.
You're automatically protected by Windows' default settings.
The ICF firewall is very simple to use with the VPN service. It does not need special configuration in order to permit connections to the VPN. After installing the VPN client, simply make your connection as usual.
However, even with the VPN, your computer will not be able to run its own web server, FTP server, or other service replying to requests from outside. First, the ICF firewall is preconfigured to block requests initiated from outside (although responses to requests made by your computer are allowed). Second, the VPN server does not allow you to create permanent connections with a fixed IP address; your VPN connection will eventually time out even if you leave your computer connected and running. The combination of these two factors means that the VPN does not provide a workaround for the fact that the ICF blocks unsolicited inbound communications.
For more information on ICF, see your computer's Microsoft's Help feature.
The Help feature is located inside the Start menu. Search for ICF and/or Firewall.