Ensure that all Namespaces have Network Policies defined

Kako se proverava

Metod provere: Komanda ljuske

ns=$(kubectl get namespaces -o jsonpath='{range .items[*]}{.metadata.name}{"\n"}{end}') || exit 1
np=$(kubectl get networkpolicies -A -o go-template='{{range .items}}{{.metadata.namespace}}{{"\n"}}{{end}}') || exit 1
bad=$(printf '%s\n' "$ns" | awk -v ex='^(kube-system|kube-public|kube-node-lease|gatekeeper-system|azure-arc)$' 'NF && $1 !~ ex' | grep -vxF "$(printf '%s\n' "$np" | sort -u)")
if [ -z "$bad" ]; then echo compliant; else printf '%s\n' "$bad" | sed 's/^/no NetworkPolicy: /' | head -n 25; fi

Očekivani izlaz

compliant

Kako se ispravlja

Metod ispravke: Smernica ili zakrpa infrastrukture

Ensure the AKS cluster is using a supported network policy engine with Azure CNI Overlay, then defining explicit NetworkPolicy objects for every workload-hosting namespace. In AKS, pod traffic is unrestricted by default until policies are applied, Azure CNI Overlay supports Azure network policies, Calico, and Cilium, and Microsoft currently recommends Cilium for new policy deployments because of its scalability, security, and eBPF-based enforcement. 1. Enable or migrate to a supported network policy engine for the cluster if networkPolicy is unset or still using a legacy design. 2. Create a baseline deny-all policy in each workload namespace so traffic is blocked until explicitly allowed. 3. Add targeted ingress and egress allow rules for required application, platform, DNS, logging, and external service flows. 4.

Proverite ovaj računar

Pokrenite ovo na računaru za koji imate dozvolu za proveru. Skeniranje radi u režimu samo za čitanje.

tmaegis scan --target aks --level 2