PowerShell offers more structured and manipulable output. Run .
netstat -ano | findstr :PORT_NUMBER
Find the process under the Details tab, right-click it, and select End process tree . Via Command Prompt: Run the following command: taskkill /PID [INSERT_PID_NUMBER] /F Use code with caution. Step 2: Disable the Underlying Windows Service windows 11 open ports
Not necessarily. Windows 11 has many legitimate system services that listen on ports. Focus on:
An means a service or application is listening for incoming network traffic on that TCP or UDP port. PowerShell offers more structured and manipulable output
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":
Port 135 is the RPC Endpoint Mapper. It acts as a directory service for DCOM (Distributed Component Object Model) applications. When a client wants to communicate with a remote Windows service (like the Registry or Service Control Manager), they first query port 135 to find the dynamic port assigned to that service. Via Command Prompt: Run the following command: taskkill
Create an inbound rule blocking all ports except explicit allows — "whitelist" approach.
How to reduce unnecessary open ports (actionable steps)
In networking, a port is a virtual point where network connections start and end. Ports are identified by numbers ranging from 0 to 65535.
If you discover an unfamiliar open port, you can track down the exact software running it using its Process ID (PID). Note the number from your netstat or PowerShell search. Press Ctrl + Shift + Esc to open the Task Manager . Navigate to the Details tab. Click the PID column header to sort numerically.