Detect fake ip´s/proxys

Hi all, I occupy a little help with something I want to do.
I need to know (I think this if possible) and refuse entry to a server bots.
Practically detect registrations with false ip / proxies and quickly remove from the server.
But even more, I want to know if it is likely to happen before it enters the server, such as when you enter a premium server, you're not premium, a little message appears and you will not let you enter.
Basically that's what I want to do in a plugin, thanks for your attention.

Hi, in short what I want is to prevent bots from accessing the server.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

TheIronKill
Premium servers will only accept premium players.
Also you'd want to use AsyncPlayerPreLoginEvent.

 

What about all those people who connect through a VPN or proxy for the safety. Using a proxy doesn't justify between a hacker and a norMal user. Are you going to prevent kids who want to play on your server just because their parents set up a VPN for security.

 

Also, I've never seen a server bot lol.
So I don't know why you'd want to do this.

 

I know, I know ... but it has happened on the server where I help with the administration, if what I wrote above is not consistent, then I need you to help me stop this, detect bots, and not let them come, Thank you for your attention.

 

Welp its impossible to see if they are a 'proxy' or just a normal player even if java could work with remote addr's like in php to detect what OS it runs it still could be spoofed, or else they would just put another dns on top of it...

However what you could do though but its surely bad for your resources is looking to apis like a dnsbl of known 'bad' ips however ip adresses always got re used and that means these ip adresses could also mean its a normal user.

But why would you block these ip adresses?, if its because those pwnage spambots there many plugins who can block it.