Public/Test-PrivateIPv4Address.ps1
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<# .SYNOPSIS Determines if an IPv4 Address is in a private address space. .DESCRIPTION Determines if an IPv4 Address is in a private address space. .PARAMETER IPv4Address The IPv4 Address .EXAMPLE Test-PrivateIPv4Address -IPv4Address 192.168.1.1 True .EXAMPLE Test-PrivateIPv4Address -IPv4Address 8.8.8.8 False .NOTES The function supports RFC 1918 & RFC 6598 address space. .LINK http://www.github.com/roberttoups/IPv4Toolbox #> function Test-PrivateIPv4Address { [CmdletBinding()] [OutputType([Boolean])] param ( [Parameter( Mandatory = $true, ValueFromPipeline = $true )] [Alias('IPAddress')] [ValidatePattern( '^(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.){3}(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])$' )] [String] $IPv4Address ) begin {} process { $PrivateAddressCollection = DATA { # RFC 1918 @{ Subnet = '10.0.0.0' Prefix = 8 } @{ Subnet = '172.16.0.0' Prefix = 12 } @{ Subnet = '192.168.0.0' Prefix = 16 } # RFC RFC 6598 @{ Subnet = '100.64.0.0' Prefix = 10 } } $Found = $false foreach($PrivateAddress in $PrivateAddressCollection) { $ArgumentCollection = @{ IPv4Address = $PrivateAddress.Subnet Prefix = $PrivateAddress.Prefix NoPrivateAddressSpace = $true } $SubnetInformation = Get-SubnetInformation @ArgumentCollection $ArgumentCollection = @{ FirstIPv4Address = $SubnetInformation.SubnetId LastIPv4Address = $SubnetInformation.BroadcastAddress TestIPv4Address = $IPv4Address } $Result = Test-IPv4AddressWithinRange @ArgumentCollection if($Result) { $Found = $true break } } $Found } end {} } |