The EAE OS 2200 Remote Access Server (RATL) is designed to use only one IP or port combination for listening on the network. If you want to deploy ePortal solution for an EAE Application on OS 2200 server, you need to configure a new RATL server that listens on the backend IP address used by ePortal to communicate with the OS 2200 server.
Refer to the Enterprise Application Remote Access Guide on Unisys support website for more information on how to configure RATL server for ePortal solution on OS 2200 server.