Brief introduction to Web Application Firewalls
A Web Application Firewall (WAF) is a security solution that protects web applications by filtering and monitoring HTTP/HTTPS traffic between clients and the application. Unlike traditional firewalls that operate at the network level, a WAF focuses on the application layer, enabling it to detect and block threats targeting the specific logic of web applications. This includes inspecting and filtering URLs, form inputs, cookies, and other user-generated content. In addition to basic (rule based) filtering, many WAFs offer advanced features such as IP white- and blacklisting, which allow administrators to explicitly permit or block traffic from specific IP addresses or ranges. ...