Export/Import separate Firewall rules through Powershell

Source: https://gallery.technet.microsoft.com/scriptcenter/Powershell-to-export-and-23287694/view/Reviews

See attached scripts: Export-FirewallRules.ps1 & Import-FirewallRules.ps1.

As with registry actions, first take a backup (on both source and target machine!). You can backup/export the complete Firewall set as follows:

• right-click the top most item in the TOC of the Firewall (= Windows Defender Firewall with Advanced Security on Local Computer)
• choose Export Policy…
• save the .wfw file (e.g. AllFirewallRulesMachineName.wfw)

If necessary, activate the execution policy in Powershell (run as Administrator):

set-executionpolicy unrestricted

Export the desired rule(s). The export script can take three parameters:

• -Name: display name of the rule(s) to be processed - wildcard * can be used - default is *
• -CSVFile: output file - default is FirewallRules.csv
• -JSON: use JSON instead of CSV (default is $FALSE)

Example:

.\Export-FirewallRules.ps1 '*Remote*' RemoteRules.json -json

If you get "Export-FirewallRules.ps1 cannot be loaded. The file Export-FirewallRules.ps1 is not digitally signed.", goto SelfsignPowershellScripts

If you want to limit the rules to be imported, simply edit the .csv or .json file.

The import script takes two parameters:

• -CSVFile: input file - default is FirewallRules.csv
• -JSON: use JSON instead of CSV (default is $FALSE)

Import the rule(s) as follows:

Example:

.\Import-FirewallRules.ps1 RemoteRules.json -json

If you get "Import-FirewallRules.ps1 cannot be loaded. The file Import-FirewallRules.ps1 is not digitally signed.", goto SelfsignPowershellScripts.