LimboFilter 
 
 
 
Most powerful bot filtering solution for Minecraft proxies. 
Needs LimboAPI to be installed on the proxy! 
Test server: ely.su 
See also 
- LimboAuth - Auth System built in virtual server (Limbo). Uses BCrypt, has TOTP 2FA feature. Supports literally any database due to OrmLite.
 
- LimboAPI - Library for sending players to virtual servers (called limbo)
 
Features of LimboFilter 
- Improved Falling Check - Check X, Z coordinates;
 
- Highly customizable CAPTCHA's - change fonts, backplates, colors, alphabet-pattern, length;
 
- Client settings and brand checking;
 
- Highly customisable config - you can change all the messages the plugin sends;
 
- Ability to partially disable protection on low-loads of proxy;
 
- Ability to prepare raw packets to reduce CPU usage;
 
- Fast MCEdit schematic world loading for CAPTCHA checking;
 
- And more...
 
LimboFilter /vs/ popular antibot solutions: 

Donation 
Your donations are really appreciated. Donations wallets/links/cards: 
- MasterCard Debit Card (Tinkoff Bank): 5536 9140 0599 1975
 
- Qiwi Wallet: PFORG or this link
 
- YooMoney Wallet: 4100 1721 8467 044 or this link