Block a Port in Windows 7’s Firewall

Learn how to close a port in Windows 7’s firewall.

In this example I’m going to block all traffic requesting port 80 (the default HTTP “web” port).

Close a Port in Windows 7’s Firewall

Open Control Panel from the Start menu.
Select Windows Firewall.

Note: If Windows Firewall is not available, change View by to Large icons at the top right of the Control Panel window.
Select Advanced settings in the left column of the Windows Firewall window.
Select Inbound Rules in the left column of the Windows Firewall with Advanced Security window.

Note: You can prevent outbound traffic by selecting Outbound Rules.
Select New Rule in the right column.
Select Port in the New Inbound Rule Wizard and then click Next.
Select which protocol this rule will apply to (TCP or UDP), select Specific local ports, type a port number (80), port numbers (80,81), or a range of port numbers (5000-5010) and then click Next.
Select Block the connection and then click Next.
Select when this rule applies (check all of them for the port to always stay closed) and then click Next.
Give this rule a name and then click Finish to add the new rule.

The port is now closed.

Still need help? Ask your computer question now.