Port requirements for cluster communication

Review cluster port requirements for Cortex XSOAR On-prem 8.7 (EoL).

The following ports are required for standalone (one VM) and a three-node cluster (three VMs).

Port	Protocol	Purpose
22	TCP	SSH communication
8880	TCP	Node communication

Required control plane ports

A Kubernetes cluster consists of a control plane and one or more worker nodes. For Cortex XSOAR, in standalone (one VM), the VM acts as both control plane and as a worker node. In multi-node clusters, the first three nodes act as both control plane and as worker nodes, and any additional node added acts as a worker node.

The following ports are required for a control plane.

Name	Port	Protocol
etcd client port	2379	TCP
etcd peer port	2380	TCP
Kubernetes API	6443	TCP
Kubelet API	10250	TCP
kube-scheduler	10257	TCP
kube-controller-manager	10259	TCP

Required worker node port

The following port is required for a worker node.

Name	Port	Protocol
kube nodeport range	30000:32767	TCP

Intra-node communication

The following port is required for a multi-node cluster (three VMs).

Name	Port	Protocol
Calico with IPv4 Wireguard	51820	UDP