Duplicated form GIS StackExchange:
I would like to deploy between 4 and 5 ArcGIS Server 10.2.1 instances with different licenses on one machine. Can this be accomplished by pointing the server to different ports via the web adaptor or another method? I would also have other 3rd party applications on this physical machine with 1-3 virtual machines. The ideal configuration would be a RAID with 32 Gigs of RAM on one physical machine.