Plesk offers the possibility to configure the web application firewall (plesk modsecurity) in the administration menu. What is modsecurity? Plesk modsecurity is a web application firewall, i.e. a firewall that checks access to web applications such as content management systems (wordpress, joomla, etc.) or other applications and prevents known attacks. The advantage of modsecurity is the possibility to analyze accesses first and to define accordingly, which accesses are legitimate and which have to be rejected directly. Of course, it is impossible to set everything yourself, but there are providers who provide ready-made rules, some of which are live, and can thus react directly to current threats.