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tab, the "Listening Ports" section shows every open port and the exact application name associated with it. PowerShell (Advanced): Use the command Get-NetTCPConnection -State Listen for a detailed technical breakdown. How to Open a Port in Windows 11 Firewall
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: . windows 11 open ports
Applications using HTTP.sys include IIS, Print Spooler web APIs, and some .NET services. tab, the "Listening Ports" section shows every open
Type wf.msc and press to launch Windows Defender Firewall with Advanced Security . In the left sidebar, click on Inbound Rules . However, one of the most overlooked aspects of
Managing open ports on Windows 11 is a blend of:
, which controls how applications and services communicate across a network. Microsoft Support Core Networking Concepts Port Types : Windows uses two main transport layer protocols: TCP (Transmission Control Protocol)
| Service | Ports | Command (Admin) | |---------|-------|----------------| | SMB 1.0/CIFS | 445 | Disable-WindowsOptionalFeature -Online -FeatureName SMB1Protocol | | SMB 2.0/3.0 | 445 | Set-SmbServerConfiguration -EnableSMB2Protocol $false (careful) | | NetBIOS over TCP/IP | 137-139 | In network adapter → IPv4 → WINS → Disable NetBIOS | | LLMNR | 5355 | Group Policy → Computer Config → Admin Templates → Network → DNS Client → Turn off LLMNR | | mDNS | 5353 | Stop dnscache service or disable via registry | | Connected Devices | 5040 | Stop CDPSvc (may break dynamic lock, phone linking) | | Delivery Optimization | 7680 | Settings → Windows Update → Advanced → Delivery Optimization → Off |
tab, the "Listening Ports" section shows every open port and the exact application name associated with it. PowerShell (Advanced): Use the command Get-NetTCPConnection -State Listen for a detailed technical breakdown. How to Open a Port in Windows 11 Firewall
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: .
Applications using HTTP.sys include IIS, Print Spooler web APIs, and some .NET services.
Type wf.msc and press to launch Windows Defender Firewall with Advanced Security . In the left sidebar, click on Inbound Rules .
Managing open ports on Windows 11 is a blend of:
, which controls how applications and services communicate across a network. Microsoft Support Core Networking Concepts Port Types : Windows uses two main transport layer protocols: TCP (Transmission Control Protocol)
| Service | Ports | Command (Admin) | |---------|-------|----------------| | SMB 1.0/CIFS | 445 | Disable-WindowsOptionalFeature -Online -FeatureName SMB1Protocol | | SMB 2.0/3.0 | 445 | Set-SmbServerConfiguration -EnableSMB2Protocol $false (careful) | | NetBIOS over TCP/IP | 137-139 | In network adapter → IPv4 → WINS → Disable NetBIOS | | LLMNR | 5355 | Group Policy → Computer Config → Admin Templates → Network → DNS Client → Turn off LLMNR | | mDNS | 5353 | Stop dnscache service or disable via registry | | Connected Devices | 5040 | Stop CDPSvc (may break dynamic lock, phone linking) | | Delivery Optimization | 7680 | Settings → Windows Update → Advanced → Delivery Optimization → Off |