Guisew youforgot to include about paket spoofing.
What you need to do in find the un-disgruntled xor sting and retrive it to your local notepad.exe
Then you need to add in a custom xor that tells the server to null the noklip checks and upload your script in /lua/gmod/upload/aimjunk-Ez/server_rat.lua
Now go into your router, retrieve the current firmware and download ti to your dektop. Whta you need to do is open the firmware in ollydbg and change {Normalpaket} to {Lua_Payload} and save. Now load that moded firmware up into your router, you should see an option to filter out your incomign and out going connections by port, type in the port of your current server. The defualt is 27015 so next once you have it selected you hsould be able to now inject your xor into the outgoing packets to the server. DO that then go into gmod and type in console rcon_skriptexecute_Lua-payload_incomingpaket = "Your packets hash" and it should execute your xor on the server. now you have noclip and you uploaded your server_rat.lua into the server! Have fun.