greyfu

Greyfu Login Captcha adds a secure verification step to your WordPress login form, helping block automated login attempts and brute-force attacks.
Lite Version (Free): 
* Simple math-based captcha 
* Multisite compatible 
* Lightweight and fast 
* No personal data stored or transmitted 
* Works without any external service
Pro-Ready Features (Optional Upgrade): 
* Infrastructure prepared for reCAPTCHA v2 integration 
* Infrastructure prepared for hCaptcha integration 
* API key fields included
The free version is fully functional on its own and does not require any external captcha service.
<h3>Third Party Services</h3>
This plugin optionally connects to external captcha services when the Pro features are enabled:
Google reCAPTCHA (Optional) 
When reCAPTCHA is enabled in Pro settings, the plugin sends verification requests to Google’s reCAPTCHA service. 
– Service: https://www.google.com/recaptcha/ 
– Privacy Policy: https://policies.google.com/privacy 
– Terms of Service: https://policies.google.com/terms 
– Data sent: User’s IP address and reCAPTCHA response token 
– When: Only during login form submission when reCAPTCHA is enabled
hCaptcha (Optional) 
When hCaptcha is enabled in Pro settings, the plugin sends verification requests to hCaptcha service. 
– Service: https://www.hcaptcha.com/ 
– Privacy Policy: https://www.hcaptcha.com/privacy 
– Terms of Service: https://www.hcaptcha.com/terms 
– Data sent: User’s IP address and hCaptcha response token 
– When: Only during login form submission when hCaptcha is enabled
The free/lite version uses a built-in math captcha that does not connect to any external service.
<h3>Support / Contact</h3>
For issues or questions, please contact us: 
Email: hello@greyfu.com 
Website: https://greyfu.com

Greyfu Login Captcha

A lightweight captcha that protects your WordPress login page from automated bot attacks using a simple math challenge.

wtbplugins

WTB Firewall is a lightweight but powerful WordPress firewall plugin designed to help you protect your site from unwanted visitors, brute-force attacks and malicious traffic.
The plugin allows you to define clear access rules, automatically block suspicious behaviour, and correctly detect real visitor IP addresses even when your site is behind a proxy or CDN.
<h4>Core Features</h4>
<ul>
<li>Manual IP allow and block rules</li>
<li>Country-based access control</li>
<li>Automatic blocking after repeated authentication failures</li>
<li>Built-in rate limiting to protect your site from excessive requests and abuse</li>
<li>404 monitoring to detect and block traffic generating repeated missing-page errors</li>
<li>Proxy support with trusted header detection</li>
<li>Lightweight design with minimal performance impact</li>
<li>Clean WordPress-native admin interface</li>
</ul>
<h4>Why use WTB Firewall?</h4>
Many WordPress security plugins include dozens of features that add complexity and overhead. WTB Firewall focuses on essential firewall functionality so you can:
<ul>
<li>Stop brute-force login attempts</li>
<li>Restrict access from unwanted regions</li>
<li>Block abusive visitors quickly</li>
<li>Ensure accurate IP detection behind proxies or CDNs</li>
<li>Keep your site fast while improving security</li>
</ul>
<h4>Designed for Performance</h4>
WTB Firewall is built with performance and reliability in mind. Rules are processed efficiently, unnecessary background tasks are avoided, and the plugin integrates cleanly with WordPress without slowing down your site.

WTB Firewall

WordPress firewall plugin with IP blocking, country rules, brute-force protection and proxy support to secure your site.

Greyfu Login Captcha vs WTB Firewall