How to hide and protect a file manager like KodExplorer from brute force?

Question

Information Security

Actually the whole question is in the topic title. Link to the Chinese file manager: https://github.com/kalcaddle/KodExplorer
The question is no longer how to protect the admin panel itself from hacking (I suppose you need to have serious knowledge in php), but how to hide it from everyone. As I understand it, it needs to be hidden from robots through htaccess or something like that, are there any other measures to hide the path to it?

Answer 1

1. Authentication: Google Authenticator, OAuth or SMS.
2. Protection: ban - by IP or cookies.
3. Protection: hiding - ModRewrite
4. Brute force protection: IP to shared cache (memory) and multiplier: 3 times wrong: 10 minutes break, 3 more times - 1 hour, another day, etc.