Add rate-limit=10 in server.properties and restart again.
| Feature | Description | |---------|-------------| | | Uses multiple free or cracked Minecraft accounts to join a server simultaneously | | Low CPU/RAM mode | Simplified bots with no rendering to run many instances on weak hardware | | Join delay control | Bots join in waves to avoid server connection limits | | Auto-reconnect | Bots rejoin after being kicked | | Chat spam | Automated messages sent by each bot | | Movement patterns | Walk randomly, circle players, or stand still to appear semi-legitimate |
) is the simplest way to prevent unauthorized bots from joining, though it may limit server growth if not automated. Free Anti-Bot Plugins : Specifically designed to stop join floods. CAPTCHA Plugins
: Setting online-mode=true in your server.properties is the most effective first step, as it forces Mojang authentication and prevents many simple bot scripts from connecting [19]. minecraft bot attack free
This plugin uses intelligent algorithms to detect rapid connection spikes.
Finally, it is crucial to understand the legal and ethical boundaries. While you may be curious to "stress test" your own server to see how it holds up, . Running bot attacks or load tests on any server you do not own is illegal and unethical.
You don't need an expensive enterprise solution to stop these attacks. By implementing a layered defense, you can create a highly resilient server at zero cost. Here are the free and open-source tools you should be using. Add rate-limit=10 in server
A Java-based bot tool designed to test how your server handles multiple concurrent connections.
Keep network-compression-threshold around 256 to optimize packet sizes, and ensure your server hardware is not wasting resources on empty data. Checklist: Immediate Actions During an Attack
If bots successfully bypass the login phase, they flood the chat with advertising or crash commands. Why Default Server Settings Fail CAPTCHA Plugins : Setting online-mode=true in your server
. By default, Minecraft allows anyone with your IP to join. Whitelisting restricts access to only specific usernames you have manually approved. How to do it: In your server console, type /whitelist on . Then, add players individually with /whitelist add [playername] 2. Implement "Greylisting"
The system automatically drops malicious packet floods before they touch your hosting node. Top Free Anti-Bot Plugins
If malicious traffic passes through your network defenses, application-layer plugins will stop them from joining the game.
A bot attack is a type of distributed denial-of-service (DDoS) attack where an attacker uses a network of compromised computers (a "botnet") or scripts to send an overwhelming number of fake players or connection requests to your server. Unlike a volumetric DDoS that aims to clog your internet pipe, these "application layer" or "Layer 7" attacks target the Minecraft server software itself, aiming to exhaust its resources and crash it. Most unprotected servers fail under attacks of just 1–5 Gbps, which can be executed in seconds, making proactive defense essential.