by invisnet on WordPress.org
WP fail2ban integration with Gravity Forms to log spam form submissions.
No matter how good your anti-spam measures, some will get past. This add-on logs spam form submissions via WP fail2ban, and provides a new filter for fail2ban.
fail2ban
An add-on for Gravity Forms. Provides a PDF Viewer field.
The CSRF vulnerability is the most famous web vulnerability, since ... i do not remember, too long !
AntiBot Captcha - simple good-looking, but well-protected plugin against spam robots for your blog comments