Added Files

Powershell/Scripts/check-ipv4-address.ps1

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+<#
+.SYNTAX       check-ipv4-address.ps1 [<address>]
+.DESCRIPTION  checks the given IPv4 address for validity
+.LINK         https://github.com/fleschutz/PowerShell
+.NOTES        Author: Markus Fleschutz / License: CC0
+#>
+
+param($Address = "")
+
+function IsIPv4AddressValid { param([string]$IP)
+	$RegEx = "^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$"
+	if ($IP -match $RegEx) {
+		return $true
+	} else {
+		return $false
+	}
+}
+
+try {
+	if ($Address -eq "" ) {
+		$Address = read-host "Enter IPv4 address to validate"
+	}
+	if (IsIPv4AddressValid $Address) {
+		write-host -foregroundColor green "OK - IPv4 address $Address is valid"
+		exit 0
+	} else {
+		write-warning "Invalid IPv4 address: $Address"
+		exit 1
+	}
+} catch {
+	write-error "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}