By default, all inbound connections that are not explicitly allowed are blocked.
To view the currently applied firewall rules for inbound connections:
All currently defined rules are listed. The S (status) column shows the icon if the firewall blocks the packets that match the rule, and the
icon if the firewall allows the packets that match the rule to pass through.
Note. Configuring firewall for specific network interfaces is only available under Microsoft Windows Server 2003. If you are using Microsoft Windows Server 2008, go to the Firewall Rules tab.