AWS IP Addresses

Understanding IP Addressing in Amazon EC2

Public and Private IP Addresses

Amazon EC2 instances are assigned both public and private IP addresses. Public IP addresses are used to access your instance from the internet, while private IP addresses are used for communication within your Virtual Private Cloud (VPC).

DNS Hostnames

In addition to IP addresses, EC2 instances are also assigned DNS hostnames. These hostnames can be used to access your instance instead of using the IP address directly. DNS hostnames are based on the instance's public IP address and the Amazon EC2 region in which it is located.

Optimizing IP Address Usage

There are a few things you can do to optimize your IP address usage in EC2. First, you should only use public IP addresses when necessary. For example, if you are running a web server, you will need a public IP address so that users can access your website. However, if you are running a database server, you do not need a public IP address.

You can also use Elastic IP addresses to assign a static public IP address to your instance. This can be useful if you want to have a consistent public IP address for your instance, even if it is stopped and started.

IP Address Ranges for Amazon QuickSight

The following table provides the IP address ranges for Amazon QuickSight in each AWS Region.

| Region | IP Address Range | |---|---| | US East (N. Virginia) | 52.94.114.0/24 | | US West (Oregon) | 52.91.122.0/24 | | US West (N. California) | 52.94.110.0/24 | | Asia Pacific (Sydney) | 13.244.153.0/24 | | Asia Pacific (Tokyo) | 13.112.80.0/24 | | Europe (Ireland) | 52.56.192.0/24 | | Europe (Frankfurt) | 52.57.120.0/24 | | South America (São Paulo) | 52.92.230.0/24 |

Published IP Address Ranges

Amazon Web Services publishes IP address ranges for its services in the ip-ranges.json file. This file is updated regularly and can be used to identify and control traffic to and from AWS services.

Finding Public IP Addresses

You can find the public IP address of your EC2 instance by logging into the AWS Management Console and navigating to the EC2 dashboard. You can also use the following command:

``` aws ec2 describe-instances --instance-ids --query 'Reservations[*].Instances[*].PublicIpAddress' --output text ```

Replace with the ID of the instance you want to find the public IP address for.

Conclusion

Understanding IP addressing in Amazon EC2 is essential for managing your instances. By following the guidelines in this article, you can optimize your IP address usage and ensure that your instances are accessible from the internet and within your VPC.