Every internet-connected device uses ports to sort network traffic. Ports are numbered from 0 to 65535, divided into standard categories:
Specify whether the rule applies to or UDP , type the specific port number under Specific local ports , and click Next . Select Block the connection and click Next .
Flags:
netsh advfirewall firewall add rule name="Block_FTP" dir=in action=block protocol=TCP localport=21
Is this system operating on a or a strictly managed corporate network ? AI responses may include mistakes. Learn more windows 11 open ports
Windows 11 does have inbound web servers, SSH, or Telnet enabled by default.
If your audit reveals a port opened by an unrecognized or insecure application, you should close it immediately to safeguard your system. Step 1: Terminate the Active Process Every internet-connected device uses ports to sort network
Sometimes you need to open a port intentionally—for an online game, a file-sharing application, or a server you're running. Here's how to do it safely.
To check open ports in Windows 11, you can use the following methods: If your audit reveals a port opened by