Minecraft Login/Registration System Analysis

Core Features

Authentication System

• Commands: /login <password> and /register <password>
• Password verification with attempt limit (default: 3)
• Minimum password length requirement (4 characters)

Account Protection

• Configurable account limit per IP
• Action blocking while unauthenticated
• IP registry to prevent multi-accounting

Security Measures

• Freezes unauthenticated players (movement prevention)
• Blocks interactions (items, blocks, chat)
• Prevents unauthorized command usage

Administration Tools

• Force login: /auth forcelogin
• Manual unfreeze: /auth unfreeze
• IP limit configuration: /auth setiplimit
• Configuration reload: /auth reload

Internationalization

• Multi-language support (PT/EN included)
• Customizable messages via JSON files

Technical Components

Data Storage

• Player data: players.json
• System config: config.json
• IP registry: ip_registry.json
• Custom IP limits: ip_limits.json

Session Management

• SessionData: Tracks login state and attempts
• PlayerState: Stores pre-login player data
• PlayerData: Permanent account information

Event Handling

• Player connection/disconnection
• Movement and interaction attempts
• Command and chat usage
• Item throwing

System Flow

First Access

1. Player is frozen and prompted to register
2. After registration, player is disconnected to login

Subsequent Access

1. Player must login with registered password
2. Full functionality unlocked after authentication

Protection Mechanisms

Unauthenticated players cannot:

• Move or interact with world
• Use commands (except login/register)
• Send chat messages
• Throw items

Customization Options

• Message files (in messages/)
• Default accounts-per-IP limit
• Custom IP-specific limits
• System language (PT/EN)

Summary: A robust authentication system providing security against unauthorized access and multi-accounting, with comprehensive admin tools for server management.