Richard Siddaway's Blog

The really important thing about our firewall is the rules that are configured.

function get-rule {             
[CmdletBinding()]             
param ()             
BEGIN{}#begin             
PROCESS{            
$fw = New-Object -ComObject HNetCfg.FwPolicy2            
$fw.Rules |            
foreach {            
            
$profiles = @()            
$ruleprofile = $_.Profiles            
            
@(1,2,4, 1073741824) |             
foreach {            
  if ($_ -band $ruleprofile){$profiles += [ProfileType]($_)}            
}            
              
 $rule = New-Object -TypeName PSObject -Property @{            
     Name = $_.Name            
     Protocol = [Protocol]($_.Protocol)            
     Direction = [Direction]($_.Direction)            
     Profile = $profiles            
     Action = [Action]($_.Action)            
   }            
 $rule.PSTypeNames[0] = "FirewallRule"            
 $rule            
            
}            
            
}#process             
END{}#end            
            
<# 
.SYNOPSIS
Displays firewall rules

.DESCRIPTION
Displays firewall rules.
Properties are:
 Name
 Protocol
 Direction
 Profile
 Action 
 

.EXAMPLE
get-rule

get-rule | format-table -AutoSize -Wrap
#>            
            
}

Start with the HNetCfg.FwPolicy2   object. Put the Rules collection onto the pipeline. check each of the possible profiles and add them to the array.

An output object is created with the properties converted from their numeric values to descriptive values using a few more enumerations.

Suggested usage:

get-rule

get-rule | format-table -AutoSize -Wrap