Windows 11 Open Ports <EXTENDED ✦>

Network ports serve as virtual communication gateways for your computer. Understanding and managing open ports in Windows 11 is a fundamental skill for maintaining digital hygiene, troubleshooting application errors, or optimizing localized server environments. 🌐 Core Principles of Network Ports

Method 2: Using the Windows Defender Firewall

1. Go to Settings > Update & Security > Windows Security.
2. Click on Firewall & network protection.
3. Click on Advanced settings.
4. In the Windows Defender Firewall with Advanced Security window, click on Inbound Rules or Outbound Rules to view active connections and ports.

• Risk: Historically, SMB has been the vector for devastating exploits (e.g., EternalBlue, WannaCry).
• Mitigation: Windows 11 includes SMB signing by default and has deprecated the older, less secure SMBv1 protocol. However, the open port remains a high-value target for brute-force attacks or exploitation if patching lags.

netsh http show servicestate

Set-SmbServerConfiguration -EnableSMB1Protocol $false
Set-SmbServerConfiguration -EnableSMB2Protocol $false
Stop-Service -Name "LanmanServer" -Force
Set-Service -Name "LanmanServer" -StartupType Disabled

• Use EDR/AV and logging to detect suspicious listener creation or network activity.