A true Web Application Firewall to protect and secure WordPress.
NinjaFirewall (WP Edition) is a true Web Application Firewall. Although it can be installed and configured just like a plugin, it is a stand-alone firewall that sits in front of WordPress.
It allows any blog administrator to benefit from very advanced and powerful security features that usually aren't available at the WordPress level, but only in security applications such as the Apache ModSecurity module or the PHP Suhosin extension.
NinjaFirewall requires at least PHP 5.3 (5.4 or higher recommended to enable all its features) or HHVM 3.4+, MySQLi extension and is only compatible with Unix-like OS (Linux, BSD). It is not compatible with Microsoft Windows.
NinjaFirewall can hook, scan, sanitise or reject any HTTP/HTTPS request sent to a PHP script before it reaches WordPress or any of its plugins. All scripts located inside the blog installation directories and sub-directories will be protected, including those that aren't part of the WordPress package. Even encoded PHP scripts, hackers shell scripts and backdoors will be filtered by NinjaFirewall.
NinjaFirewall includes the most powerful filtering engine available in a WordPress plugin. Its most important feature is its ability to normalize and transform data from incoming HTTP requests which allows it to detect Web Application Firewall evasion techniques and obfuscation tactics used by hackers, as well as to support and decode a large set of encodings. See our blog for a full description: An introduction to NinjaFirewall filtering engine.
PATH_INFO) and raw POST data.
By processing incoming HTTP requests before your blog and any of its plugins, NinjaFirewall is the only plugin for WordPress able to protect it against very large brute-force attacks, including distributed attacks coming from several thousands of different IPs.
See our benchmarks and stress-tests:
The protection applies to the
wp-login.php script but can be extended to the
xmlrpc.php one. The incident can also be written to the server
AUTH log, which can be useful to the system administrator for monitoring purposes or banning IPs at the server level (e.g., Fail2ban).
File Guard real-time detection is a totally unique feature provided by NinjaFirewall: it can detect, in real-time, any access to a PHP file that was recently modified or created, and alert you about this. If a hacker uploaded a shell script to your site (or injected a backdoor into an already existing file) and tried to directly access that file using his browser or a script, NinjaFirewall would hook the HTTP request and immediately detect that the file was recently modified or created. It would send you an alert with all details (script name, IP, request, date and time).
File Check lets you perform file integrity monitoring by scanning your website hourly, twicedaily or daily. Any modification made to a file will be detected: file content, file permissions, file ownership, timestamp as well as file creation and deletion.
Live Log lets you watch your website traffic in real time. It displays connections in a format similar to the one used by most HTTP server logs. Because it communicates directly with the firewall, i.e., without loading WordPress, Live Log is fast, light and it will not affect your server load, even if you set its refresh rate to the lowest value.
NinjaFirewall can alert you by email on specific events triggered within your blog. Some of those alerts are enabled by default and it is highly recommended to keep them enabled. It is not unusual for a hacker, after breaking into your WordPress admin console, to install or just to upload a backdoored plugin or theme in order to take full control of your website.
It allows you to scan your website for malware. The scanning engine is compatible with the popular Linux Malware Detect LMD (whose anti-malware signatures are included with this release) and with some ClamAV signatures as well. You can even write your own anti-malware signatures. See our blog for more details about that: Adding your own signatures to NinjaFirewall Anti-Malware
To get the most efficient protection, NinjaFirewall can automatically update its security rules daily, twice daily or even hourly. Each time a new vulnerability is found in WordPress or one of its plugins/themes, a new set of security rules will be made available to protect your blog immediately.
Because we respect our users privacy, security rules updates are downloaded from wordpress.org repo only. There is no connection to NinTechNet's servers (A.K.A "phoning home") during the update process.
Unlike a Cloud Web Application Firewall, or Cloud WAF, NinjaFirewall works and filters the traffic on your own server and infrastructure. That means that your sensitive data (contact form messages, customers credit card number, login credentials etc) remain on your server and is not routed through a third-party company's servers, which could pose unnecessary risks (e.g., employees accessing your data or logs in plain text, theft of private information, man-in-the-middle attack etc).
IPv6 compatibility is a mandatory feature for a security plugin: if it supports only IPv4, hackers can easily bypass the plugin by using an IPv6. NinjaFirewall natively supports IPv4 and IPv6 protocols, for both public and private addresses.
NinjaFirewall is multi-site compatible. It will protect all sites from your network and its configuration interface will be accessible only to the Super Admin from the network main site.
You can prepend your own PHP code to the firewall with the help of an optional user configuration file. It will be processed before WordPress and all its plugins are loaded. This is a very powerful feature, and there is almost no limit to what you can do: add your own security rules, manipulated HTTP requests, variables etc.
NinjaFirewall is very fast, optimised, compact, and requires very low system resource. See for yourself: download and install P3 Plugin Performance Profiler or Query Monitor and compare NinjaFirewall performances with other security plugins.
NinjaFirewall looks and feels like a built-in WordPress feature. It does not contain intrusive banners, warnings or flashy colors. It uses the WordPress simple and clean interface and is also smartphone-friendly.
Each NinjaFirewall menu page has a contextual help screen with useful information about how to use and configure it. If you need help, click on the Help menu tab located in the upper right corner of each page in your admin panel.
Check out our new supercharged edition: NinjaFirewall WP+
Requires: 3.3.0 or higher
Compatible up to: 4.6
Last Updated: 10 hours ago
Active Installs: 10,000+
17 of 25 support threads in the last two months have been marked resolved.
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