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NF Software Engineering — Building 5G Core Network Functions · Pro
TS 33.501 (5G security architecture) mandates TLS 1.2 or higher for all SBI traffic between NFs. In practice TLS 1.3 is the modern default. Mutual TLS (mTLS) — where both client and server authenticate each other using X.509 certificates — is recommended for production deployments and required when NFs span security domains. The certificate management problem at 5GC scale is real: an operator running hundreds of NF instances needs automated issuance, rotation, and revocation. cert-manager on Kubernetes plus an internal CA is one common solution; service mesh sidecars (Istio, Linkerd) handle…
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