AWS CROSS ACCOUNT Demo Lab || Switch Role || Giving Temporary Access of your Account to Others

AWS Cross-Account Access refers to the ability to grant permissions to resources in one AWS account to users or services in another AWS account. This feature enables you to securely share resources, such as S3 buckets, EC2 instances, or Lambda functions, between different AWS accounts.

There are a few different approaches to implementing cross-account access in AWS:

IAM Roles: You can create IAM roles in one AWS account and then grant users or services in another account permission to assume those roles. The users or services can then temporarily assume the roles and access the resources in the other account.

IAM User/Role Policies: You can create IAM policies that allow specific users or roles in one account to access resources in another account. These policies can be attached to IAM users or roles to grant them the necessary permissions.

Resource-based policies: Some AWS services, such as S3 or Lambda, allow you to define resource-based policies that control access to the resources. These policies can be configured to allow access from specific AWS accounts or IAM roles.

To set up cross-account access, you typically need to perform the following steps:

Create an IAM role in the target account that defines the desired permissions for accessing resources.
Update the trust policy of the IAM role to allow the source account to assume the role.
In the source account, create an IAM user or role with the necessary permissions to access the resources in the target account.
Attach an appropriate IAM policy to the user or role in the source account, granting the necessary permissions to assume the IAM role in the target account.
Use AWS Security Token Service (STS) to assume the IAM role in the target account and obtain temporary security credentials.
Use the obtained credentials to access the desired resources in the target account.
It's important to ensure that appropriate security measures are in place when setting up cross-account access, such as using strong IAM policies, following the principle of least privilege, and regularly reviewing and auditing access controls.

AWS provides detailed documentation and examples for implementing cross-account access, which you can refer to for specific services and scenarios.
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