Haltdos is a web application firewall that can protect your server from different kind of attacks, such as : SQL injections, RCE, XSS, LFI, RFI and more. Haltdos has also a bot protection feature, that allows you to block bots from your website. One downside of Haltdos is that it's not open source, and that the free version is limited to one website only, meaning you can't protect more than website. In this tutorial, you will learn how to install Haltdos on Ubuntu 22.04. Step 1 - Upda