Windows Firewall–Block Foreign IP Addresses

If you admin any Windows Server and use tcpview utility, you will see lots of connection attempts to your server’s common connection ports (e.g. Remote Desktop port 3389).

It is a good idea to block connection attempts from foreign countries if you don’t expect to connect from abroad.

http://cyber-defense.sans.org/blog/2011/10/25/windows-firewall-script-block-addresses-network-ranges

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