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Web Application Firewalls (WAF)

A Web Application Firewall (WAF) is a security solution designed to monitor, filter, and block malicious traffic to and from web applications. It operates at the application layer of the OSI model and is used to protect web applications against various attacks such as cross-site scripting (XSS), SQL injection, and other vulnerabilities.

Real-Life Use Cases:

E-Commerce Security: WAFs are extensively used in e-commerce platforms to protect sensitive customer data like credit card information and personal details from cyber attacks.

Healthcare Web Applications: In healthcare, WAFs safeguard patient portals and other web applications that handle sensitive health information, ensuring compliance with regulations like HIPAA.

Banking and Financial Services: WAFs are critical in protecting online banking platforms and financial applications from attacks that can compromise user accounts or financial data.

The Explanation:

Imagine a WAF as a highly specialized security guard for a website. Just like a security guard monitors people entering a building, checking for any suspicious behavior, a WAF scrutinizes the traffic coming to a web application. It looks for patterns or actions that might indicate a potential threat, like someone trying to sneak in through a window (akin to an SQL injection) or pretending to be someone they’re not (similar to cross-site scripting). If the WAF spots these dangers, it can block them, effectively preventing unwanted visitors (cyber attacks) from entering and causing harm.

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