> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/cortex-xsoar-8-on-prem/8.13/install-cortex-xsoar/system-requirements/port-requirements-for-cluster-communication.md).

# Port requirements for cluster communication

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                      |
| 2049 | TCP      | Backup and restore server communication |
| 111  | TCP      | Backup and restore server 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. They are open only between the nodes in the cluster. For standalone, none of these ports are required.

| 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. It is open only between the nodes in the cluster.

| Name                | Port        | Protocol |
| ------------------- | ----------- | -------- |
| kube nodeport range | 30000:32767 | TCP      |

**Intra-node communication**

The following port is required for a multi-node cluster (three VMs). It is open only between the nodes in the cluster. It is not required for standalone.

| Name                       | Port  | Protocol |
| -------------------------- | ----- | -------- |
| Calico with IPv4 Wireguard | 51820 | UDP      |


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