Securing high performance and speed for web content delivery relies on smart caching strategies. Caching content is a well-understood principle, but this still doesn’t make smart caching a given. Cache invalidation isn’t easy, but important things rarely are. Varnish can help.
While not classified as a traditional cybersecurity method, an origin shield can help mitigate the effects of both malicious and non-malicious traffic overloads and DDoS attacks. Origin protection can play an important role in the overall security picture without explicitly or exclusively being a security feature.
An origin shield is a protective measure that shields your origin server(s) from overload, ensuring high availability, performance and uptime. While no one size fits all in terms of how a company should structure their origin shield strategy, an origin shield is always a good idea to reduce the load on your origin server and maintain high-performance content delivery.
Caching is good. What if, though, you could increase caching efficiency by letting some objects through the net, and not caching them as they are requested?
This is the thinking behind a new feature in the latest release of Varnish Enterprise that allows object misses to be counted via utils.backend_misses().