A web application firewall is a https://www.upguard.com/blog/network-security solution for commercial use that protects servers from potential cyber attacks that can https://www.upguard.com/blog/exploit a web application’s https://www.upguard.com/blog/vulnerability. By the definition of the https://listings.pcisecuritystandards.org/documents/information_supplement_6.6.pdf#page=4, a web application firewall is “a security policy enforcement point positioned between a web application and the client endpoint.”

Web application firewalls are designed to protect the servers of your web applications from all kinds of attacks like https://www.upguard.com/blog/what-are-web-shell-attacks, https://www.upguard.com/blog/phishing, malicious payloads, and https://www.upguard.com/glossary/ransomware while also preventing unauthorized data from leaving the web app.

To secure your web application from malicious traffic, the web application firewall inspects HTTP/S traffic to and from your web service applications via a reverse proxy firewall.

Also called web application firewalls or application-level gateway, https://www.upguard.com/blog/proxy-server firewalls operate at an application layer instead of a network layer.

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