What is a Backdoor

Backdoor is a kind of a virus, but it can only harm to your server, not your pc

Shitty code that usually kicks players the mod's maker doesn't like or promotes him to admin upon joining. Absolutely don't use these.

Backdoor is also used for file extraction mostly in clockwork based servers, to get access to server files and extract sweet content from servers...and ends up here in gmod leaks....
most recognizable backdoor code line in clockwork framework is like this:

it's like an HTML or MySQL thing inside on an addon that destroys or can affect your server

backdoor is type of virus. dont download this addon bro

a back door is a trojan that isnt detectable or as detectable as a normal trojan

Probably most of leaks there are backdoored tbh xD

A backdoor in a leaked addon is malicious code that can run scripts in your server which can either run commands that can ruin the server or be able to turn someone into superadmin to further mess up your server. This is why it is good to have custom named ranks like Owner or Super Admin instead of the lowercap version which backdoors seem to work with. They are pretty easy to see but if you can't, there are many tools on the internet that can find these for you.

a Backdoor is a piece of malicious code that some bad boys put into leaked addons so they can use the backdoor and run scripts/strings and fuck your server up,

Backdoor it's part of the code with viruses. You can use the backdoor to download everything from the hosting. because of it you need to check every adoon.