If you have ever seen any of the Cloudflare talks about how Cloudflare hacked nginx and saved the Internet, you will have some idea of how difficult and complicated edge security policy really is. Anomalies are legion and enormous. The "bad actors" are brilliant, talented, persistent, and have huge resources available for attack. How can the rest of us hope to defend ourselves and keep complicated network security policies from causing major outage or failing their primary purpose of defense?
Here, with step-by-step examples and demonstrations is one approach, using Calico. However, the examples are simple and straightforward. The real world is much-more complex.
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