All Backdoors are literally located within your autorun folders, mostly server side rather then clientside, make sure you disable the option in your server for people to execute Lua scripts, but that isnt much help because there are inject menu's that have the backdoor options in them, within the autorun lua files, make sure while scrolling through to look for a scroll bar that goes to the right side of the file because alot of people tend to attempt to hide the backdoor on that side of the lua file thinking that no one will spot them, its very easy to find