For best results, AmigaDOS 3.0 or later is recommended, though the server is known to work under AmigaDOS 2.1.
You must be using the AmiTCP TCP/IP stack, version 4.0 or later. An AS225R2 version of AWS is in the works.
AWS consumes very little disk space and memory. You could theoretically run it off of one floppy, or serve RAM-resident documents so that the floppy can be removed.