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CKA study material · question 490 of 1000

A colleague cannot reach a port-forwarded application from another machine. Why?

  1. The forward binds the local port on the loopback address
  2. The Pod's NetworkPolicy blocks it
  3. Port-forwarding requires a NodePort Service
  4. The forward expires after 60 seconds
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Answer: A. The forward binds the local port on the loopback address

A port-forward binds loopback, so the tunnel is reachable only from the machine running kubectl.

Source: Use Port Forwarding to Access Applications in a Cluster (Kubernetes) — Forward a local port to a port on the Pod

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