AWS Identity and Access Management (IAM)

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3 min readFeb 24, 2024

AWS Identity and Access Management (IAM)

AWS Identity and Access Management (IAM)

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February 25, 2024

AWS Identity and Access Management (IAM)

Introduction to AWS Identity and Access Management (IAM)

AWS Identity and Access Management (IAM) is a web service that helps you securely control access to AWS resources. It enables you to manage users, groups, and permissions to allow or deny access to various AWS services and resources.

Creating and Managing IAM Users

With IAM, you can create and manage users who can access your AWS resources. Each user is assigned a unique set of security credentials, including an access key and a secret access key, which are used to authenticate and authorize requests made to AWS services.

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Creating a New IAM User

To create a new IAM user, you can use the AWS Management Console, AWS CLI, or AWS SDKs. Here’s an example of creating a new user using the AWS CLI:

aws iam create-user --user-name myuser

Managing IAM User Permissions

IAM allows you to define fine-grained permissions for your users using IAM policies. These policies are JSON documents that specify what actions are allowed or denied on which resources. Here’s an example of an IAM policy that allows a user to read objects from an S3 bucket:

{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::mybucket/*"
}
]
}

Managing IAM Roles

IAM roles are similar to users, but they are not associated with a specific person. Instead, roles are meant to be assumed by trusted entities, such as AWS services or applications running on EC2 instances. Roles allow you to grant temporary access to resources without sharing long-term credentials.

Creating an IAM Role

To create an IAM role, you can use the AWS Management Console, AWS CLI, or AWS SDKs. Here’s an example of creating a new role using the AWS Management Console:

  1. Open the IAM console.
  2. Click on “Roles” in the left navigation pane.
  3. Click on “Create role”.
  4. Select the type of trusted entity that will assume this role.
  5. Follow the on-screen instructions to complete the role creation.

Using IAM Roles with EC2 Instances

One common use case for IAM roles is to grant EC2 instances access to AWS resources. By assigning an IAM role to an EC2 instance, you can avoid the need to store and manage access keys on the instance itself.

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aws ec2 run-instances --image-id ami-12345678 --instance-type t2.micro --iam-instance-profile Name=myrole

Conclusion

AWS Identity and Access Management (IAM) provides a powerful and flexible way to manage access to your AWS resources. By using IAM, you can ensure that only authorized users and services have access to your resources, helping to improve security and compliance.

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