Windows 11 Open Ports

One of the most common Windows 11 networking errors is: "Only one usage of each socket address is normally permitted."

This means a Windows 11 open port is already occupied. windows 11 open ports

To block all inbound traffic on Port 21 (FTP): One of the most common Windows 11 networking

netsh advfirewall firewall add rule name="Block_FTP" dir=in action=block protocol=TCP localport=21

Imagine you have Port 3389 (RDP) open to the internet. A hacker scans Shodan.io, finds your IP, and runs a brute-force attack. If your password is weak, they gain remote desktop control within minutes. Imagine you have Port 3389 (RDP) open to the internet

When it comes to securing your Windows 11 PC, most users think about antivirus software or strong passwords. However, one of the most overlooked aspects of security is the network "doors" your computer leaves open: Open Ports.

An open port is essentially a communication endpoint. While some are necessary for your apps and games to function, others can serve as an open invitation for hackers and malware.

In this guide, we’ll walk you through how to check for open ports in Windows 11, identify which apps are using them, and how to close them to harden your security.