An Elastic IP address is a static IPv4 address designed for dynamic cloud computing. An Elastic IP address is allocated to your AWS account and remains yours until you release it. By using an Elastic IP address, you can mask instance or software failure by quickly reassigning the address to another instance in your account. Alternatively, you can specify an Elastic IP address in the DNS record for your domain, so your domain points to your instance. For more information, refer to your domain registrar's documentation.

An Elastic IP address is a public IPv4 address that is reachable from the Internet. If you need to connect to an instance that doesn't have a public IPv4 address, you can associate an Elastic IP address with your instance to enable Internet connectivity.

Allocating an Elastic IP using the user interface: Go to Networking > Elastic IPs.

In the upper toolbar, click Allocate.

In the "Allocate Elastic IP Address" dialog box, click "OK."

The new Elastic IP will appear in the displayed list with the following information:

Private IP address – Once the EIP is associated with a VPC that includes a NAT gateway, it will be linked to a private IP address in the private subnet range for the VPC.

Instance – The instance of the VPC NAT gateway to which the EIP is linked.

VPC – The VPC to which the EIP is associated.

Public DNS server

Elastic IP Operations Once the EIP is created, it will appear in the EIP list in the Networking > Elastic IP view. The following operations can be performed by selecting the EIP from the list and clicking the corresponding icon on the top toolbar.

Detach – Detach the EIP from the NAT gateway instance.

Delete – Delete the EIP.