Private/Test-DnsName.ps1
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function Test-DNSName { [CmdletBinding()] param ( [Parameter(Mandatory=$true)] [string]$DnsName ) # Load the System.Net namespace Add-Type -AssemblyName System.Net Write-Verbose "Validating DNS name: $DnsName" try { # Use the Dns.GetHostAddresses method to validate the DNS name $result = [System.Net.Dns]::GetHostAddresses($DnsName) if ($result) { Write-Verbose "DNS name '$DnsName' is valid. IP addresses: $($result.IPAddressToString -join ', ')" return $true } else { Write-Verbose "DNS name '$DnsName' is not valid." return $false } } catch [System.Net.Sockets.SocketException] { Write-Verbose "DNS name '$DnsName' is not valid. Exception: $_" return $false } catch { Write-Verbose "An unexpected error occurred: $_" return $false } <# .SYNOPSIS Validates a DNS name by attempting to resolve it to an IP address. .DESCRIPTION The Test-DNSName function takes a DNS name as input and attempts to resolve it to an IP address using the System.Net.Dns class. If the DNS name is valid and can be resolved, the function returns $true. Otherwise, it returns $false. .PARAMETER dnsName The DNS name to validate. This parameter is mandatory. .EXAMPLE PS C:\> Test-DNSName -dnsName "example.com" This command validates the DNS name "example.com". .EXAMPLE PS C:\> Test-DNSName -dnsName "invalid-dns-name" This command attempts to validate the DNS name "invalid-dns-name" and returns $false if it cannot be resolved. .NOTES Author: Your Name Date: Today's Date Version: 1.0 #> } |