Configure a static IP address
AWS instances are launched with a dynamic IP address by default, which means that the IP address changes every time the server is stopped and restarted. In many cases, this is not desired and so, users also have the option to assign the server a static IP address (also known as an “elastic IP”).
To configure a static IP address:
Log in to the AWS EC2 Dashboard
Select the instance in the dashboard.
In the left navigation bar, select the “Network & Security -> Elastic IPs” menu item.
Click the “Allocate New Address” button.
Click “Allocate” in the next screen.
A new static IP address will be generated and will appear in the list of available IP addresses.