The temporary 1.11 world is running on the normal buildatnight.com IP. Remember this is a vanilla map. Follow all vanilla SMP precautions. Dont give out your coords to anyone you dont trust completely and dont build close to spawn. (Think a few thousand blocks out) Building a nether portal near your base is almost as dangerous as posting your coords at spawn. Dont do it. Build one farrr away from your base. There is no protection and no rollback in vanilla. People will try to grief you.
The normal rules still apply! If you are caught griefing you will be banned. Breaking any of the other rules of Buildatnight will also result in a ban.
The normal world with ranks, plugins, protections and goodies is still up! The IP is mc.buildatnight.com You can connect to it using the 1.10 client like normal. When the normal world is updated to 1.11 and has protections the temp map will be removed and the main server will be back at the main IP
Have fun testing out 1.11 in vanilla!