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 every Minecraft version from 1.5.2 (lowest version tested working) to 1.8.3
  • 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.

Please Donate ;D

Default Blacklist API's:

Official AntiJoinBot Maven Repo:

My Build Server:


Minecraft Serverlist (DE)

Minecraft Serverlist (EN)

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  • Avatar of Zilacon Zilacon Mar 30, 2015 at 09:57 UTC - 0 likes

    @Maxetto: Go

    It shows its compatible for 1.5.2 and im running 1.6.4 but i get this error when someone joins:

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  • Avatar of Maxetto Maxetto Mar 29, 2015 at 22:27 UTC - 0 likes

    @The_PC_Tech_Guy: Go I probably misunderstood your post. Is your server running in Offline Mode? If this is so, then you have to put "OfflineMode: true" in AntiJoinBot. Otherwise just let me know and I'll look into it ASAP.

    @zuzzas: Go

    Sorry, i was on a study holiday in London. I still haven't uploaded the source for version 5.0, but you can find a source for the previous versions in the main page.

  • Avatar of zuzzas zuzzas Mar 25, 2015 at 10:03 UTC - 0 likes

    Do you have a source code repository?

  • Avatar of The_PC_Tech_Guy The_PC_Tech_Guy Mar 21, 2015 at 14:32 UTC - 0 likes

    @Maxetto: Go

    Offline, as in not using a MySQL database? If so, that's correct - offline is set to true

    In the config, OfflineMode is set to false, as I specified in my comment (albeit not as you spell it in the config). No errors occur if OfflineMode is set to true.

    I do not and never intend to run my server in offline-mode

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

  • 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.
  • 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

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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
Recent files