Is blocking the NodePort range (30000-32767) between OpenShift nodes supported?

Solution Verified - Updated -

Issue

  • What is the impact of blocking the NodePort range (30000-32767 TCP/UDP) at the firewall?
  • Is allowing the NodePort range in the firewall mandatory for node-to-node communication in OCP 4?

Environment

  • Red Hat OpenShift Container Platform
    • 4

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