- Controlling externet traffic with Istio https://banzaicloud.com/blog/istio-external-demo/
- Controlling externet traffic with Envoy/DNS hijack: https://monzo.com/blog/controlling-outbound-traffic-from-kubernetes
- Internal network policies: https://monzo.com/blog/we-built-network-isolation-for-1-500-services
- Nice articles: https://medium.com/@vbehar