# Configure network connectivity for VMware vSphere VMs

To back up and restore VMware vSphere VMs, allow network communication between the Commvault access node and your VMware infrastructure.

If your environment uses firewalls or network segmentation, verify connectivity from the access node to both vCenter and ESXi hosts.

## Prerequisites

- Configure network connectivity for Commvault.

## Required connectivity

- You must have network connectivity from the access node to vCenter.

- You must have network connectivity from the access node to ESXi hosts.

## Required ports

If firewalls exist between components, allow the following connectivity.

Port | Protocol | Source | Destination | Purpose
--- | --- | --- | --- | ---
443 | HTTPS | Access node | vCenter, ESXi hosts, VMware Cloud Director | API communication
902 | TCP | Access node | ESXi hosts | VMware vSphere data transfer for backup and restore operations

## How transport modes affect connectivity

Transport modes control how backup data is read and can add additional requirements beyond basic connectivity.

- All transport modes require access node connectivity to vCenter and ESXi hosts.

- If you use SAN transport, the access node must also have direct SAN access to the storage that hosts the VM datastores.

- If you use NAS transport, the access node must be able to access the NFS storage that hosts the datastores.

## Configure communication between access nodes

If you use more than one access node for VMware vSphere protection, allow access nodes to communicate with each other for coordination.

- Open TCP 8400 (default) between all access nodes.

- Open the configured data transfer port range between all access nodes.

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