You can secure your WordPress sites with CrowdSec using our latest application bouncer, available on the WordPress marketplace. This new plugin is compatible with versions 1.0.x and beyond. Given that the vast majority of websites in the world are hosted on WordPress, this plugin improves our defense arsenal in our mission to defend the greatest number.
Step one: Install CrowdSec agent
This bouncer has been designed to protect WordPress-hosted websites from all kinds of attacks. To be able to use this blocker, the first step is to install the CrowdSec agent.
Then, both installation and configuration of the plugin can be done in a few clicks from the WordPress marketplace.
Please note that first and foremost CrowdSec must be installed on a server that is accessible via the WordPress site. Remember: CrowdSec detects, bouncers deter.
Both pieces of software don’t have to be installed on the same server, although that would be easiest. To protect your server in the best possible way, the CrowdSec agent needs to be able to read relevant logs – either via file, syslog or whatever works best in your environment.
Step two: Install WordPress plugin
Installing the CrowdSec WordPress plugin is as easy as installing any other WordPress plugin:
- Click ‘Plugins’ in the left navigation on your site’s dashboard.
- Type ‘CrowdSec’ in the text field to the right. Hit enter.
- In the CrowdSec plugin click ‘Install Now’
Once installed click ‘activate’ as illustrated below.
Now configure the plugin by clicking CrowdSec in the left navigation as shown below.
Set LAPI URL to the location of your CrowdSec agent. Is it installed on the same server, fill it out as shown above.
‘Bouncer API’ is created in cscli. Just follow the instructions.
For details on how to configure the CrowdSec WordPress bouncer, go to the official documentation or read on. Pay special attention to the option ‘Public website only’. This must be disabled if you wish to protect wp-admin (which you most likely would want to).
The “Flex mode” – a bulwark agains false positives
Thanks to the “Flex mode”, it is impossible to accidentally block access to your site to people who don’t deserve it. This mode makes it possible to never ban an IP but only to offer a Captcha, in the worst-case scenario.
CrowdSec blends into your design
When a user is suspected to be malevolent, CrowdSec will either send them her a Captcha to resolve or simply a page notifying that access is denied. Please note that it is possible to customize all the colors of these pages in a few clicks so that they integrate best with your design. On the other hand, all texts are also fully customizable. This will allow you, for example, to present translated pages in your users’ language.
The right balance between performance and security
By default, the “live mode” is enabled. The first time a stranger connects to your website, this mode means that the IP will be checked directly by the CrowdSec API. The rest of your user’s browsing will be even more transparent thanks to the fully customizable cache system.
But you can also activate the “Stream mode.” This mode allows you to constantly feed the bouncer with the malicious IP list via a background task (CRON), making it even faster when checking the IP of your visitors. Besides, if your site has a lot of unique visitors at the same time, this will not influence the traffic to the API of your CrowdSec instance.
If you’ve ever been confronted with high traffic, you are probably familiar with Redis or Memcached technologies. You have the capability to activate these caching technologies in the CrowdSec bouncer settings to guarantee invisible IP control on your site. For further explanation on stream vs live mode, check the official documentation.
CDN-friendly without forgetting other load balancers
If you use a CDN, a reverse proxy, or a load balancer, it is now possible to indicate in the bouncer settings the IP ranges of these devices to check the IP of your users. For other IPs, the bouncer will not trust the X-Forwarded-For header.
Coming up next
Soon, the plugin will have a dashboard allowing you to visualize the activity of your bouncer in live. It will also be possible to connect directly to CrowdSec’s global reputation database, without having to install an agent on your machine if you don’t wish to.
Widely tested, 100% open source
This plugin has been tested on the vast majority of WordPress versions installed in the world (90%+), according to WordPress real-time statistics. It has also been tested on a very wide range of PHP versions (7.2, 7.3, 7.4 and 8), the language in which WordPress is coded.
This plugin is released under MIT license, the most permissive and free license in the world. Its source code is fully available on GitHub. You can discover the entire collection of CrowdSec bouncers at our Hub. Beyond this one, you will find there more freshly released additions.
We would love to hear your feedback about this WordPress plugin. If you are interested in testing the bouncer to protect your sites or would like to get in touch with the team, give us a shout!