Network policies are often misconfigured or ignored entirely. This guide provides production-ready examples for namespace isolation, egress control, and DNS-aware policies.
We document common anti-patterns: overly permissive default-deny rules, policies that break health checks, and CNI-specific gotchas with Calico and Cilium.
Includes a validation checklist and tcpdump-based troubleshooting workflow for when policies don't behave as expected.