How to prevent DownLoad of complete Server Files?

I’ve recently had an increase of people some how downloading my complete server (files and all). Is there anyway to prevent this? Also is it dangerous to for people to have these files?

any and all information would be appropriated greatly!
currently I have sv_cheats 0, upload 0, no RCON setup.

sv_allowdownload 0

Current server.cfg

// DO NOT CHANGE THIS UNLESS YOU KNOW WHAT YOU ARE DOING
sv_downloadurl “http://gsn-dal115-ln.vilayer.com/fastdownload///garrysmod
sv_allowupload “1”
sv_allowdownload “1”

This won’t corrupt the FastDL process?

Should I have both upload and download at “0”?

No. Yes.