Very often, in addition to the normal security flaws, intrinsic vulnerabilities are created in the service delivery methods of websites and applications. To overcome this situation, technologies have been developed that directly address the protection of these web servers. These systems are known as Web Application Firewalls (WAFs) that differ from a traditional firewall as the latter generally inspects all traffic between two or more networks, whether internal or external, behaving like a gate between them. , without going into the details of traffic and operations carried out through them.