: Security patches often address vulnerabilities in services that listen on network ports. Regular updates close these holes before attackers can exploit them.
Press the , type cmd , and select Run as Administrator . Type the following command and press Enter: netstat -ab windows 11 open ports
The /F flag forces termination of the process : Security patches often address vulnerabilities in services
A acts as a virtual endpoint for network communications on your computer. Think of your computer as an apartment building with 65,535 doors (ports)—each door can be opened to allow specific types of traffic in or out. When a port is "open" and in a LISTENING state, it means a service or application is actively waiting for incoming network connections. Type the following command and press Enter: netstat
Open the , type Windows Defender Firewall with Advanced Security , and press Enter . Click on Inbound Rules in the left-hand sidebar.
Change the Startup type to , click Stop to halt the current session, and click OK . Step 2: Blocking Ports via Windows Defender Firewall
This displays a list of all active network connections. Look at the column; the number after the colon ( : ) is the port number.