Anti Join Bot

Bukkit Firewall / Proxy Blocker

This plugin protects your server from bots that use proxies!

The players IP will be automatically verified when they join.

The plugin has been written to have an High level of performance.


  • Works with probably every Minecraft version
  • UUID Support aswell as Nickname support (for Offline mode Servers)
  • Whitelistless (Doesn't require to activate a Whitelist to block the bots)
  • Configurable delayed start (to reduce plugin load on server start/restart)
  • MySQL/SQLite support
  • Downloadable Blacklist on server start
  • Customizable Blacklists ("URL:Response" format) (Paste the URL with , instead of .)
  • Customizable Kick Messages
  • Quickly Disable/Enable the plugin via command
  • Reload the config in game
  • Permission to bypass checks
  • User Whitelist/Blacklist
  • Force check mode (Kick everyone for the first check, player is asked to rejoin)
  • Permission support
  • Proxy check from Server List and change MoTD if a proxy is found (Beta)
  • Debug mode available
  • Plugin Metrics



1. Put the "AntiJoinBot.jar" in the plugin folder and run the server.

2. It will create a folder called "AntiJoinBot" containing the "config.yml" (Default Config) and the "offline_data.db".

3. Ready ;D

Permissions and Commands:

Bypass checks:

Permission: "ajb.bypass"

Add/block players in whitelist:

Permission: "ajb.add"

  • "/ajb add <player>" -> (add player to whitelist)
  • "/ajb block <player>" -> (add player to blacklist)

Toggle AntiJoinBot:

Permission: "ajb.toggle"

  • "/ajb toggle"

Reload Configuration and Database Connection:

Permission: "ajb.reload"

  • "/ajb reload"

If you can not connect, please wait 24 hours and try it again or restart your router.

If this plugin helped you, please Donate ;D

Default Blacklist API's:

Source: (Before 5.0) (After 5.0)


Minecraft Serverlist (DE)

Minecraft Serverlist (EN)

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  • Avatar of Maxetto Maxetto Mar 20, 2015 at 14:36 UTC - 0 likes

    @The_PC_Tech_Guy: Go

    Do you also have "OfflineMode" set to true in the AntiJoinBot config? It seems like it wants to take the UUID but, since it's offlinemode, it gives nothing.

  • Avatar of The_PC_Tech_Guy The_PC_Tech_Guy Mar 17, 2015 at 05:00 UTC - 0 likes

    Errors spew out right when someone joins on Spigot 1.8.3: Using antijoinbot 5.0, with offline-mode changed to false.

    Last edited Mar 18, 2015 by The_PC_Tech_Guy: removed repeated tests (duplicated results) - new pastebin link.

    This account is so old that I don't even use that username anymore.
    I now go by "robomwm"

  • Avatar of Maxetto Maxetto Feb 28, 2015 at 22:25 UTC - 0 likes

    AntiJoinBot 5.0 sent out for approval.

    It might not be the best version (as for code efficiency), but it's full of changes. Hope you'll enjoy this new version. As always feedback, advice and bug reports are appreciated.

    Last edited Feb 28, 2015 by Maxetto
  • Avatar of Maxim1945 Maxim1945 Feb 17, 2015 at 22:55 UTC - 0 likes

    @Maxetto: Go

    ok ty i will chek it ;)

  • Avatar of Maxetto Maxetto Feb 17, 2015 at 21:26 UTC - 0 likes

    @Maxim1945: Go

    You don't have to put Force: true unless you want to kick every player at their first login. Anyway plugin is working fine, as you see it added 29 IPs and 5 Users, so checks are working. Try waiting 60 seconds after the server start before botting ("AntiJoinBot enabled in 60 seconds")

    Last edited Feb 17, 2015 by Maxetto
  • Avatar of Maxim1945 Maxim1945 Feb 17, 2015 at 14:21 UTC - 0 likes

    @Maxetto: Go

    14:19:35 [AJB] Enabling AntiJoinBot v4.3 14:19:35 [Server thread/INFO]: AntiJoinBot enabled in 60 seconds 14:19:35 [Server thread/INFO]: AJB: Loaded: 29 IP's 14:19:35 [Server thread/INFO]: AJB: Loaded: 5 User's but it's not block proxie and theforce check mode this is my config

    AntiJoinBot: MySQL: Offline: true Host: localhost Port: 3306 Database: ajb_intelligent_blacklist User: <username> Password: <password> Blacklists: http://www,shroomery,org/ythan/proxycheck,php?ip=: Y http://yasb,intuxication,org/api/check,xml?ip=: <spam>true</spam> http://www,stopforumspam,com/api?ip=: 'yes' ServerListPing: Enabled: true Message: Don't use a Proxy :P Force: Enabled: true Message: Proxy Check... pls. reJoin! Kick: Message: Proxy is Detected. (maybe an error please reconnect your Router) Warmup: Enabled: true Seconds: 60 Debug: Enabled: false

    Last edited Feb 17, 2015 by Maxim1945
  • Avatar of Maxetto Maxetto Feb 16, 2015 at 23:05 UTC - 0 likes

    @Maxim1945: Go

    Seems strange... Does it print something like "[AntiJoinBot] Enabling version 4.3" on the server start? Did you try to send some bots on your server? Were them using proxies? Did you use your external IP when you tried to bot the server (As localhost is whitelisted by default)?

  • Avatar of Maxim1945 Maxim1945 Feb 16, 2015 at 18:20 UTC - 0 likes

    hello the plugin is not working to me there no errors it's just dont work i use bukkit 1.7.2 maybe it's something i have to do ?

    Last edited Feb 16, 2015 by Maxim1945
  • Avatar of Maxetto Maxetto Feb 16, 2015 at 12:57 UTC - 1 like

    @Manercraft: Go

    Yeah, probably. I tried using command block with many commands and it should work just like console.

  • Avatar of Manercraft Manercraft Feb 15, 2015 at 20:38 UTC - 0 likes

    @Maxetto: Go

    Ok, plugin work sorry, I have a question, can use / ajb add <player> in commandBlock with / ajb add @p @a[with argument here]

    Last edited Feb 16, 2015 by Manercraft

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Date created
Oct 20, 2012
Last update
Feb 28, 2015
Development stage
  • enUS
GNU General Public License version 3 (GPLv3)
Curse link
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