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# Public IP Addresses

By default, access to VPSA instances from the public Internet is not
available, for security and privacy reasons.

The VPSA Front-End IP address is used for VPSA management via the UI and REST
API.
It is also used for data IO workload, where host connectivity is via iSCSI, NFS, and SMB protocols.
The VPSA Front-End IP address is allocated on the Zadara Storage Cloud
Front-End network.
Only servers in the Cloud Servers network can reach this IP address.
Servers outside this network cannot access it.

To enable access to VPSA instances from outside the cloud network, Public
IP addresses are allocated in the Cloud management interface, and can be
assigned to VPSA instances.

A typical use case requiring Public IP addresses is VPSA Asynchronous
Remote Mirroring.
This involves two VPSAs in different regions, or between on-premise and
public cloud deployments, or even between different Cloud Providers for
Disaster Recovery (DR).
In these cases, communication between the VPSAs takes place via an
authenticated and encrypted channel over the public Internet , thus
requiring Public IPs.

Cloud admins can use Command Center to view, define, edit and delete public
IP addresses, and to assign them to VPSA instances.

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## Adding Public IP Addresses

To define new Public IP Addresses:

1. Click **Public IPs** in Command Center’s left menu panel.

   The Public IPs grid displays.
2. Click **New Public IP(s)** at the top right.

   The **New Public IP(s)** dialog opens.
   1. To configure the new IP range, enter the properties’ values:

      | **Property**    | **Description**                                                                                     |
      |-----------------|-----------------------------------------------------------------------------------------------------|
      | Label           | Descriptor for the Public IPs                                                                       |
      | VLAN ID         | A new or existing VLAN for this Public IP range<br/>that is different from the cloud tenant’s VLANs |
      | Gateway         | Public IP network Gateway                                                                           |
      | Netmask         | Public IP network subnet mask                                                                       |
      | Public IP Range | Range of external public IP addresses to be defined                                                 |
      | IP Range        | For NAT, enter the Corresponding internal IP range.<br/>Otherwise, enter the external range         |
   2. Click **Submit** to confirm the operation.

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## Editing Public IP Addresses

To edit the configuration of a Public IP:

1. Click **Public IPs** in Command Center’s left menu panel.

   The Public IPs grid displays.
2. Click the edit icon on the right of the IP to be edited.

   The **Edit Public IP** dialog opens.
   1. Update the relevant properties’ values.
   2. Click **Submit** to confirm the operation.

## Deleting Public IP Addresses

To delete the configuration of a Public IP:

1. Click **Public IPs** in Command Center’s left menu panel.

   The Public IPs grid displays.
2. Click the edit icon on the right of the IP to be edited.

   The **Edit Public IP** dialog opens.
   1. At the top right, click **Delete**.
   2. Confirm the deletion operation.