Port 6443 — Kubernetes API
Quick reference for TCP/UDP port 6443, used by Kubernetes API. Includes what the service does, security guidance and related ports.
Port
6443
Protocol
TCP
Service
Kubernetes API
What is port 6443?
Kubernetes API server.
What port does Kubernetes API use?
Kubernetes API listens on port 6443 by default.
Security guidance
Medium risk — open with care
Port 6443 (Kubernetes API) can safely face the internet if you keep the software up to date, restrict admin endpoints, and use TLS where possible. Audit who can reach it and watch your logs.
Related ports
Frequently asked
What is port 6443 used for?+
Port 6443 is the standard TCP/UDP port for Kubernetes API. Kubernetes API server.
What port does Kubernetes API use?+
Kubernetes API listens on port 6443 by default.
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