WAF is an intrusion prevention system developed against security threats against web and application servers. According to many studies conducted in 2017 (eg Trustwave SpiderLabs), 99.7% of the applications evaluated have at least one serious vulnerability.
The purpose with the use of WAF; continuous monitoring of applications in terms of security, instant detection and prevention of threats to applications, reducing the risk of data breaches and ensuring compliance requirements for certain regulations (eg PCI DSS).
WAF solutions can work with Negative and Positive security approaches for your Web applications, and can also eliminate threats to applications for out-of-date systems with virtual patching features. Apart from these security features, WAF has features that will contribute positively to the performance of your Web applications.