Windows 11 Open Ports May 2026

Dynamic Treatise: Windows 11 Open Ports

5.2 Checking If a Port Is Actually Allowed

Even if a process listens on port 9000, the firewall may block external access.
Check effective rules:

Test-NetConnection -ComputerName localhost -Port 9000

For remote checking: Test-NetConnection -ComputerName remote-pc -Port 3389 windows 11 open ports

C. Disable Network Discovery

netsh advfirewall firewall set rule group="Network Discovery" new enable=No

Understanding Open Ports in Windows 11: Security, Management, and Best Practices

Windows 11, like all modern operating systems, communicates over networks using thousands of virtual “doors” known as ports. These ports are essential for sending and receiving data—whether you’re browsing the web, printing a document, or hosting a game server. However, every open port is a potential entry point for malicious actors. This article explains what open ports are, how to check them in Windows 11, and how to secure your system. Dynamic Treatise: Windows 11 Open Ports 5

2.3 PowerShell Cmdlets (Modern Alternative)

Get-NetTCPConnection -State Listen

Add formatting:

Get-NetTCPConnection -State Listen | 
    Select-Object LocalAddress, LocalPort, OwningProcess |
    Sort-Object LocalPort

To resolve process names:

Get-NetTCPConnection -State Listen | ForEach-Object 
    $proc = Get-Process -Id $_.OwningProcess -ErrorAction SilentlyContinue
    [PSCustomObject]@
        Port = $_.LocalPort
        Process = $proc.ProcessName
        PID = $_.OwningProcess
        Address = $_.LocalAddress
| Sort-Object Port