OpenShift Ports

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External

Internal

Internal Acces

  • UDP 4789, node to node, node to master and master to node: must be accessible for any host in the cluster, it is required for SDN communication between pods on separated hosts.
  • TCP 53 or 8053, node to master, master to master: used by internal DNS traffic.
  • TCP 8443 node to master: access to API.
  • TCP 10250 master to node: a node endpoint to be used by the master for communication.
  • TCP 4001 master to master: 4001 used for non-clustered etcd to accept change in state.



2380 TCP etcd clustered etcd uses 2380 to listen for peers, for leader election and peering connection when using standalone etcd
2379 TCP etcd etcd uses the port for client requests, used for state change traffic

External Access

  • TCP 8443 - API access, web console, CLI.
  • TCP 80, 443 - ports opened and bound to the default router.