Captcha is a security mechanism aimed to prevent robots to submit forms.
Captchas are available on the following forms:
Attention
We use the Perl module GD::SecurityImage to generate images, you need to install it if you enable Captcha feature.
Go in General parameters > Portal > Captcha:
New in version 2.0.15.
If the default Captcha does not meet your requirements, you can replace it with a different implementation. See the Lemonldap::NG::Portal::Captcha manual page for details on how to implement a Captcha module.