ColdFusion UDF to test string to determine if valid IP address or not.

isValidIPAddress_UDF.cfm

<!--- 20190801
ColdFusion UDF to test string to determine if valid IP address or not.
https://www.anujgakhar.com/2008/02/21/validate-ip-address-natively-with-coldfusion/  --->

<cfscript>
function isValidIPAddress(inputString){
	var response = false;
	var IPAddressUtils = createObject("java","coldfusion.util.IPAddressUtils");
	response = javacast("boolean", IPAddressUtils.validateIPAdress( javacast("string", arguments.inputString) ));
	if (response and listfind("0.0.0.0,255.255.255.255", javacast("string", arguments.inputString))){
		response = false;
	}
	return response;
}
</cfscript>

<cfset TestIPS = ["123", "127.0.0.1", CGI.Remote_Addr, "10.0.0.1", "10,0,0,1", "256.0.0.23"]>

<h2>IP Test</h2>
<cfoutput>
	<cfloop array="#TestIPs#" index="thisIP">
		<div>#thisIP# = #isValidIPAddress(thisIP)#</div>
	</cfloop>
</cfoutput>