Applies to untrusted public Wi-Fi networks (Unsafe for opening ports).
This lists all active connections and the ports they are using. To find a specific port (e.g., 8080), use: netstat -ano | find "8080" Step-by-Step: How to Open a Port in Windows 11
Legitimate remote desktop tools can be weaponized if their default ports are exposed to the public internet without strong authentication. Common Ports in Windows 11 (And What They Do)
Always verify which ports are actively listening or transmitting before modifying your firewall rules. Method A: Using Command Prompt (Netstat) windows 11 open ports
Assessing risk
Used for connecting to peers across NATs, often registering ports dynamically.
Before altering your network configuration, you must identify which ports are currently listening for traffic. Method A: Use Command Prompt (Netstat) Applies to untrusted public Wi-Fi networks (Unsafe for
Before opening a port, it is crucial to know which ones are currently open to avoid redundant rules and reduce security risks. Method 1: Using Command Prompt (netstat)
The built-in Network Statistics ( netstat ) tool displays all active network connections and listening ports.
| Risk | Example | |-------|---------| | Remote exploitation | SMB (445) – EternalBlue | | Information disclosure | RPC (135) – OS version, domain info | | Lateral movement | Open RPC / SMB inside a network | | Malware binding | Reverse shells listen on high ports | | Unpatched services | Print Spooler (historically 445, 139) | Common Ports in Windows 11 (And What They
Press the , type cmd , and select Run as Administrator . Type the following command and press Enter: netstat -ab
Microsoft security experts strongly advise: . Always prefer allowing applications through the firewall rather than manually opening ports.