# Elastic IPs

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## Introduction

Elastic IPs (EIPs) are used to expose instances and managed services outside of
Zadara Cloud Services. An EIP will be used in the network address operation (NAT)
of all traffic to/from the virtual network interface with which it is associated.

1. You first allocate an Elastic IP address for use in a VPC, and then associate
   it with an elastic network interface (ENI) in your VPC. An EIP can be associated
   with only one ENI at a time.
2. An EIP may be attached only to an ENI that is in a VPC with an internet gateway.

For more information on EIPs, see:
[https://docs.aws.amazon.com/vpc/latest/userguide/vpc-eips.html](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-eips.html) .

## Allocating an Elastic IP with the UI

1. Navigate to **Networking > Elastic IPs**.
2. From the top toolbar, click **Allocate**.
3. In the **Allocate Elastic IP** dialog, click **OK**.
4. The new Elastic IP will appear in the displayed list with the following
   information:
   * **Elastic IP**
   * **Private IP** - once the EIP is associated with a VPC which includes a
     NAT Gateway, it will be associated with a private IP within the private
     subnet range for the VPC
   * **Instance** - VPC NAT gateway instance with which the EIP is associated.
   * **VPC** - VPC with which EIP is associated.
   * **Public DNS**

## Elastic IP Operations

After creation of an EIP, it will be displayed in the EIP list in the
**Networking > Elastic IP** view. The following
operations can be performed by selecting an EIP from the list,
and clicking the appropriate icon from the top toolbar.

* **Detach** - detach EIP from NAT gateway instance.
* **Delete** - delete EIP.