Imperva WAF is a key component of a comprehensive Web Application and API Protection (WAAP) stack that secures from edge to database, so the traffic you receive is only the traffic you want. Imperva WAF is a key component of a comprehensive Web Application and API Protection (WAAP) stack that secures from edge to database, so the traffic you receive is only the traffic you want. Imperva Security experts to actively monitor the ever-changing threat landscape 24 hours a day, 7 days a week. Traffic across Imperva’s entire network is analyzed and reported on in ways that shape and tune ongoing policies and rules on your behalf in an effort to ensure your security posture is relevant and current.