functions/Remove-FirewallRules.ps1
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<#
.SYNOPSIS Removes firewall rules according to a list in a CSV or JSON file. .DESCRIPTION Removes firewall rules according to a with Export-FirewallRules generated list in a CSV or JSON file. CSV files have to be separated with semicolons. Only the field Name or - if Name is missing - DisplayName is used, alle other fields can be omitted anderen .PARAMETER CSVFile Input file .PARAMETER JSON Input in JSON instead of CSV format .NOTES Author: Markus Scholtes Version: 1.02 Build date: 2020/02/15 .EXAMPLE Remove-FirewallRules Removes all firewall rules according to a list in the CSV file FirewallRules.csv in the current directory. .EXAMPLE Remove-FirewallRules WmiRules.json -json Removes all firewall rules according to the list in the JSON file WmiRules.json. #> function Remove-FirewallRules { Param($CSVFile = ".\FirewallRules.csv", [SWITCH]$JSON) #Requires -Version 4.0 if (!$JSON) { # read CSV file $FirewallRules = Get-Content $CSVFile | ConvertFrom-CSV -Delimiter ";" } else { # read JSON file $FirewallRules = Get-Content $CSVFile | ConvertFrom-JSON } # iterate rules ForEach ($Rule In $FirewallRules) { $CurrentRule = $NULL if (![STRING]::IsNullOrEmpty($Rule.Name)) { $CurrentRule = Get-NetFirewallRule -EA SilentlyContinue -Name $Rule.Name if (!$CurrentRule) { Write-Error "Firewall rule `"$($Rule.Name)`" does not exist" continue } } else { if (![STRING]::IsNullOrEmpty($Rule.DisplayName)) { $CurrentRule = Get-NetFirewallRule -EA SilentlyContinue -DisplayName $Rule.DisplayName if (!$CurrentRule) { Write-Error "Firewall rule `"$($Rule.DisplayName)`" does not exist" continue } } else { Write-Error "Failure in data record" continue } } Write-Output "Removing firewall rule `"$($CurrentRule.DisplayName)`" ($($CurrentRule.Name))" Get-NetFirewallRule -EA SilentlyContinue -Name $CurrentRule.Name | Remove-NetFirewallRule } } |