[App_rpt-users] how do I change default port from 4569 to 4568 on node?

Hi All, I know this has been asked before. I have 2 node boxes and would like to put both on the same router/IP. I would like to change the def port on one of the nodes to 4568 so I can operate both boxes. The first server has 4 nodes on it already and maxed out on the USB ports. So using second box to add an extra node. I remember somebody saying that a change must be made in the node and the folks at Allstar have to set something in the server? Please advise. Thanks. Jon VA3RQ