Using a Firewall
Platí pro: Windows SBS 2003
It is recommended that you enable a firewall to help protect your network from unauthorized access.
A firewall is a security system that acts as a protective boundary between your local network and the Internet. For more information, see Protecting your network from the Internet by using a firewall.
You can use the Configure E-mail and Internet Connection Wizard to enable a firewall on your server or on a UPnP certified router. For more information, see Firewall Settings for your network.