Used for connecting to peers across NATs, often registering ports dynamically.
Run PowerShell as Administrator and enter:
| Parameter | What it does | |-----------|---------------| | netstat -a | Displays all active and inactive connections, plus all TCP/UDP ports the device is listening to | | netstat -b | Shows the executable (application) associated with each connection (requires admin rights) | | netstat -n | Shows addresses and ports as numbers instead of trying to resolve names | | netstat -an \| find "LISTENING" | Filters the output to show only ports that are listening for connections | | netstat -an \| find ":3389" | Checks whether a specific port (in this case, 3389 for Remote Desktop) is open on your system | windows 11 open ports
: Run netstat -ano or the PowerShell equivalent once a month to see what's listening on your system. Look for unfamiliar processes or ports you don't recognize.
In these cases, restrict open ports to trusted IP addresses via firewall rules rather than opening them to the entire internet. Used for connecting to peers across NATs, often
Right-click the and select Terminal (Admin) or PowerShell (Admin) .
If you cannot disable the software completely but want to prevent external network traffic from reaching it, you can create a strict firewall rule. In these cases, restrict open ports to trusted
This guide covers how to check, open, and manage ports in Windows 11 securely. Part 1: How to Check Which Ports Are Currently Open
If you need to host a game server or use a specific application that requires an open port, follow these steps to create an "Inbound Rule":
You can create specific rules for TCP or UDP protocols, restricting them to specific ports or ranges.