This plugin presents random words-based CAPTCHA testing to prevent bots logging onto your server.

You can configure the number of questions presented and the complexity of the question generated.

In this version, if a player/bot fails the test, s/he/it will be kicked with a message indicating that s/he/it failed the CAPTCHA test.

You can also set the punishment of failing the CAPTCHA test:

#

# This is the command being executed at the failur of CAPTCHA test
# This command will be executed as console.
# punishment: "tempban %player% 5m You failed CAPTCHA test"
punishment: "kick %player% %message%"

Test Server: TBI

Currently available CAPTCHA modules:

RandomWordImage: ask a player to type the word on the map.
RandomWord: ask a player to type the word at the specified location in the list
SimpleMath: ask a player to type the answer of the specified question in the list of simple math question
ReverseWrod: ask a player to type the word at the specified location in the list in the reverse order (dXDi -> iDXd)
ReverseWrodImage: ask a player to type the word on the map in the list in the reverse order (dXDi -> iDXd)

Example of RandomWord CAPTCHA test
[img] tag

Example of SimpleMath CAPTCHA test
[img] tag

Commands:

/captcha reload : reloads config.yml file.
/captcha list : lists currently available CAPTCHA module.
/captcha try <module name>: try out CAPTCHA challenge. If you specified "Any", one of available modules will be automatically picked.

Permissions:

captcha.bypass : allows you to bypass the captcha test.

Installation:
You just need to install CAPTCHA.jar in the plugins folder.

config.yml

Messages:
    ErrorMsg : "&c[CAPTCHA] : Some error occured."

HelpMessages:
    banner:
      msg: "=== &e[&aMergedSpawner Commands List (%version%)&e] &r==="
    help:
      msg: "&a/captcha or /captcha help : display this help menu."
    reload:
      msg: "&a/captcha reload : reloads config file."
      permission: "captcha.reload"
    debug:
      msg: "&a/captcha debug <true|false> : turn on / off the debug mode."
      permission: "captcha.debug"
    try:
      msg: "&a/captcha try <captcha_module_name>: allow you to try the specified CAPTCHA challenge."
      permission: "captcha.try"
    list:
      msg: "&a/captcha list : lists available CAPTCHA type."
      permission: "captcha.list"

#
#
# This is the command being executed at the failur of CAPTCHA test
# This command will be executed as console.
# punishment: "tempban %player% 5m You failed CAPTCHA test"
punishment: "kick %player% %message%"
#
# Parameter to indicate which CAPTCHA module you wish to use
# Choices of CAPTHCA methods, CAPTCHA module will be randomly pick from the list
# available modules:
# RandomWord :
# SimpleMath :
# ReverseWord :
captcha_methods:
# - RandomWord
# - SimpleMath
# - ReverseWord
- RandomWordImage
- ReverseWordImage
#
# parameters for each CAPTHCA engine
CAPTCHA:
    RandomWord:
      instruction: "&e[CAPTCHA]: Type the &a%index% &eword you see in %captcha%"
    SimpleMath:
      instruction: "&e[CAPTCHA]: Type an answer of &a%index% &equestion you see in %captcha%"
      number_of_terms: 2
      max_number: 10
      multiply_division: false
    ReverseWord:
      instruction: "&e[CAPTCHA]: Type the &a%index% &eword you see in %captcha% &ein the reverse order."
    RandomWordImage:
      instruction: "&e[CAPTCHA]: Type the word you see on the map."
    ReverseWordImage:
      instruction: "&e[CAPTCHA]: Type the word you see on the map in the reverse order."
#
# the value used by various CAPTCHA generation module
# for example RandomWord module use this number for the length of words being
# generated
choice_length : 4

# the number of words to chose from
choice_count : 4

# message
success_message: "&e[CAPTCHA]: You seem to be a human!"
fail_message: "&c[CAPTCHA]: You do not appear to be a human!"
history_expire_message: "&e[CAPTCHA]: Successful CAPTCHA test result will expire in &a%time%."
history_never_expire_message: "&e[CAPTCHA]: Successful CAPTCHA test result will never expire."

#
# if this flag is true, the successful attmept will be time-stamped and recorded
# and the user don't need to do CAPTCHA test again, or until it expires.
remember_successful : true

#
# if the last successful atempt was older than time/days below
# the user will be asked to do CAPTCHA test again.
# -1 = no expiry.
history_expiry : 30d

#
# Data Storage
#
# if the following MySQL setting is configured, this plugin will use MySQL, otherwise, it will create player's individual
# file under userdata folder.
# if you already have user's captcha pass status in userdata folder, you can use '/captcha tosql' command to transfer
# the data to sql database.
DatabaseConfig:
# MySQL:
# host: localhost
# port: 3306
# user: root
# password: yourpassword
# database: CAPTCHA
# captchatable: captcha

config.yml

C@PTCHA

CAPTCHA (including Image-based CAPTCHA) for anti bot!