PowerShell: Get Firewall Rules
Need to check Windows Firewall rules - for security auditing or troubleshooting a blocked connection? This one-liner pulls the active rules straight from the system.
Prerequisites:
- Privileges: None
- Module: Built-in, no import needed
Quick Command:
Get-NetFirewallRule -Enabled True | Select-Object DisplayName, Direction, Action -First 10Example Output:
DisplayName Direction Action
----------- --------- ------
Network Discovery (SSDP-Out) Outbound Allow
Remote Assistance (TCP-Out) Outbound Allow
Core Networking - IPv6 (IPv6-In) Inbound Allow
File and Printer Sharing (SMB-In) Inbound Allow📦
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How It Works:
- Get-NetFirewallRule returns every firewall rule configured on the system - Windows ships with hundreds of built-in rules by default, most of them disabled, so filtering is essential.
- -Enabled True filters down to only rules that are actively enforced, skipping the large number of disabled/inactive default rules.
- DisplayName shows a readable description of what the rule covers, Direction shows whether it applies to Inbound or Outbound traffic, and Action shows whether matching traffic is Allowed or Blocked.
- -First 10 limits the output, since even the enabled rule set alone is typically dozens of entries.