Administration of Active Directory does not have to be hard. Too often what should be a simple task is made more difficult than it needs to be.The solution? Hyena from SystemTools Software. With ease-of-use as well as powerful importing and bulk updating capabilities.
You should create a network element (https://technet.microsoft.com/en-us/library/cc995125.aspx) for the public IP address of server you need to remote to.