What is a web application firewall (WAF)? WAF explained
A web application firewall (WAF) is a security tool that protects web applications from various threats and vulnerabilities by monitoring and filtering HTTP traffic. It is an essential safeguard for enterprises offering services online, preventing attacks such as zero-day exploits and SQL injections.
Key Points
- A WAF can be network-based, host-based, or cloud-based, often deployed as a reverse proxy.
- It inspects HTTP requests and implements rules to determine malicious from benign traffic.
- Security approaches include allowlisting, blocklisting, and hybrid models.
- A WAF is crucial for enterprises handling sensitive data to prevent data leakage and ensure compliance with security standards such as PCI DSS.
- Deployment options include on-premises hardware, integrated application-based solutions, and cloud-hosted platforms.
Why should I read this?
This article is important as it provides a comprehensive understanding of web application firewalls, a necessary component in modern cybersecurity landscapes. With the increasing prevalence of online transactions and data breaches, understanding WAFs empowers businesses to enhance their security posture and protect sensitive information effectively.