**Version: 1.1.2**
**Release Type: Major Feature Update**
### New Features - Account Per IP Limiting
This release introduces a comprehensive system to limit the number of Minecraft accounts that can connect from the same IP address simultaneously, with full Folia thread-safety.
Please delete your old config file, start your server and start the server again and configure it as you would like!
#### New Features:
- **Account Per IP Limit** - Limit simultaneous connections from the same IP address
- Configurable maximum accounts per IP (default: 3)
- Two enforcement modes: BLOCK or KICK_OLDEST
- BLOCK mode: Prevents new connections when limit reached
- KICK_OLDEST mode: Automatically kicks oldest session to allow new connection
- Whitelisted players automatically bypass limit
- Disabled by default for backward compatibility
- **FOLIA-SAFE**: Thread-safe session tracking with ConcurrentHashMap
- **FOLIA-SAFE**: Synchronized methods for atomic operations
- Local/private IPs bypass tracking (127.0.0.1, 192.168.x.x, etc.)
#### Configuration:
```yaml
# Account Per IP Limit
account-per-ip-limit:
enabled: false
max-accounts: 3
enforcement: "BLOCK" # "BLOCK" or "KICK_OLDEST"
# New messages
messages:
account-limit-reached: |
&c&lConnection Limit Reached
&7Maximum accounts per IP: &c{max}
&7Current connections from your IP: &c{current}
account-limit-kicked: |
&c&lYou have been disconnected
&7A new account connected from your IP address.
```
#### Technical Details:
- **SessionManager**: Thread-safe using ConcurrentHashMap and synchronized methods
- **SessionInfo**: Data class storing player name, UUID, and connection timestamp
- **PlayerDisconnectListener**: Automatic session cleanup on disconnect
- **Performance**: O(1) session checks, ~130KB memory for 1000 players from 250 IPs
- **Integration**: Checks occur after whitelist validation, before API checks
- **Folia Compatibility**: Works correctly in Folia's multi-threaded region environment
#### Use Cases:
- Prevent multi-account abuse on economy servers
- Limit alt accounts in competitive PvP
- Enforce fair-play policies on faction servers
- Reduce server load from excessive multi-accounting
- Comply with server rules about account limits
### Compatibility:
- Fully backward compatible with v1.1.1
- No configuration changes required (feature disabled by default)
- No breaking changes to existing functionality
- Tested on Folia 1.19+ builds
- **Verified thread-safe for Folia's multi-region architecture**
Developer information
Projects on Modrinth are automatically available through a Maven repository for use with JVM build tools such as Gradle.
maven { name = "Modrinth"; url = "https://api.modrinth.com/maven" }
