We have a Windows 2012 dedicated server. There’s a custom service running on port xxxxx which accepts connections from our custom built hardware devices over TCP/IP port. As of now we use servername.serverdomain.com:xxxxx to connect to the service and start communication. However, we prefer to use URL instead of server’s name or IP Address. So we got a custom url and set its name servers to point to dedicated server. However, just setting DNS doesn’t seem to be working. Could someone please guide as to how to get it working?

UPDATE In short I want www.custom-url.com being forwarded to servername.serverdomain.com:xxxxx. These requests are coming from hardware and not browser.