Captcha

The ConfirmEdit extension enables a very simple text Captcha that will probably catch most bots. It was designed after MediaWiki 1.5, largely by Brion VIBBER. The FancyCaptcha addon extension creates more complex image captchas.

Captchas are a way of combating automated edits, helping to ensure that wiki edits are being made by real humans rather than bots. This can be particularly useful for reducing the problem of wiki spam, but captchas reduce accessibility and cause inconvenience to human users

ComfirmEdit will require you to answer a simple question when creating pages or adding links.