Fastly's Next-Gen WAF, evolving from Signal Sciences since 2014, redefines web security through its signals technology, allowing for enhanced visibility and control over application traffic. It counters the opaque nature of legacy WAFs by offering both system and custom signals for detailed traffic analysis and response, enabling granular workflows for security teams. This approach lowers false positives and adapts to evolving threats like GraphQL, emphasizing a proactive, rather than reactive, security strategy. Signals facilitate the creation of sophisticated blocking and rate-limiting policies at the edge, further protecting against application layer attacks and reducing alert fatigue among security teams.

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