Hey guys I would like to know if its possible to build your own runescape server and is it legal? If so can you tell me where I can get all I need to build my own...

Have a look at This Thread (https://www.askmehelpdesk.com/games/very-own-runescape-server-40666.html?highlight=server)

Your not aloud to make a runescape server are you ? I always thought it to be illegal !

But you'd need lots of $$$$$$$$ anyway for a start.

Plus is'nt Runescape run and managed by Jagex ? So you'd be breaking a violation rule or something like that..