justcaptcha

Minecraft 版本： 1.16 1.16.1 1.16.2 1.16.3 1.16.4 1.16.5 1.17 1.17.1 1.18 1.18.1 1.18.2 1.19 1.19.1 1.19.2 1.19.3 1.19.4 1.20 1.20.1 1.20.2 1.20.3 1.20.4 1.20.5 1.20.6 1.21

平台： velocity

标签： management social utility

?️ ProstoCaptcha (by JustPlugins)

ProstoCaptcha is a professional-grade anti-bot solution for Velocity proxy servers. Unlike traditional text-based captchas, this plugin leverages the LimboAPI to create a fully interactive verification environment, forcing bots to simulate complex human behavior at the protocol level.

? Key Features

? Multi-Stage Interactive Quests

The plugin features a unique "Quest System" where players must interact with the environment to prove they are human:

• Resource Gathering: High-precision tracking of mining tasks including wood, stone, iron, coal, and diamonds.
• Crafting & Smelting Logic: Sophisticated checks where players must interact with Crafting Tables or Furnaces in a logical sequence (e.g., you cannot use a furnace without first obtaining fuel/ore).
• Action Validation: Deep inspection of player interactions to prevent automated script bypasses.

?️ Dynamic Map-Captcha

High-security graphical verification rendered directly on Minecraft maps:

• Advanced Rendering: Uses Graphics2D with anti-aliasing and gradient paints to generate unique codes on the fly.
• OCR Protection: Random font transformations and custom character sets make it extremely difficult for automated OCR bots to read the code.
• Smart Interaction: Dedicated session handling for map updates and input verification.

? Physics-Based Fall Check

A movement-based verification module that monitors gravity and player physics:

• Gravity Analysis: Requires players to perform a controlled fall to prove they are subject to standard game physics.
• Cheat Detection: Detects and blocks "Spider," "Fly," or "SlowFall" hacks by analyzing movement packets in the Limbo world.

? Integrated Anti-VPN & Proxy Detection

Built-in protection against malicious network sources:

• External API Support: Integrated support for providers like ProxyCheck.io.
• Smart Caching: Local TTL-based cache for IP decisions to ensure zero latency for legitimate returning players.

?️ Technical Specifications

• Platform: Velocity Proxy (Java 17+)
• Dependencies: LimboAPI (Required).
• Protocol Handling: Custom implementation of BlockDigPacket and UseItemOnBlockPacket for low-level action tracking without overhead.
• Visuals: Full MiniMessage support for modern hex-gradients in BossBars, Titles, and Chat.

? Project Structure

• me.prostoac.captcha.protocol: Custom packet decoders for serverbound-only actions, ensuring efficient communication handling.
• CaptchaSessionHandler: The core logic engine managing the entire lifecycle of player verification from join to success.
• CaptchaConfig: Optimized YAML loader with fallback memory defaults for maximum stability.

Developed with ❤️ by JustPlugins
Empowering server owners with elite-level protection.