# Software Specifications for Access Nodes for CIFS Shares and NFS Exports

## Considerations

- Access nodes are used with the network share file system agents under the file server.

  - For CIFS/SMB shares, install the Windows File System package on the access node you want to use. For information about system requirements for Windows file system, see System Requirements for Windows.

  - To back up CIFS shares using Linux access nodes, verify that your environment meets meets the System Requirements for CIFS Backups Using Linux Access Nodes.

  - For NFS exports, install the Linux File System package on the access node you want to use. For information about system requirements for Linux file system, see System Requirements for Linux File Systems.

  You can install the required packages on the access node while adding the NAS file server.

- Ensure that an access node has connectivity to the NAS file server.

- For all access nodes, the following NFS and CIFS ports must be open for outbound communication:

  Purpose | Port | Protocol
  --- | --- | ---
  NFS | 2049 | TCP
  NFS PortMapper | 111 | TCP/UDP
  CIFS (SMB) | 445, 139 | TCP
  FSx ONTAP Snap/Control | 443 | TCP

- Make sure that the NFS export policy allows the CIDR range of the access nodes.

- Perform IntelliSnap backup to reduce file locking issues and to back up a frozen copy of the data.

- For IntelliSnap backups of CIFS Shares and NFS Exports, ensure the MediaAgent package is installed, enabled, and online on the access node.

- Leverage block-based replication for copies of data on the client and then backup the snapshots needed for longer term retention.

- Recommended indexing limit of up to two billion files on each subclient.

- For UNIX systems, if there is a firewall between the MediaAgent and the file server (client), then verify that your environment meets the following requirements:

  - The Commvault Communications Service (CVD) port and the tunnel port must be open bidirectionally. The tunnel port is the CVD port plus 3. For example, if the CVD port is 8400, then the tunnel port is 8403. If the CVD port is not open, then client creation or protocol addition fail.

  - If there are traffic-pattern rules in third-party firewalls, you must turn these rules off. If you don't turn those rules off, the connectivity check between the file server and the storage MediaAgent fails.

- Streaming/regular backups and backup copy operations use the MediaAgents associated with primary copy of the storage policy. Snapshot backups use the MediaAgent associated with the snapshot copy of the storage policy.

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