End of support notice: Amazon Managed Blockchain (AMB) will stop accepting new customers on October 29, 2026. Existing customers can continue using Amazon Managed Blockchain (AMB) until September 29, 2027. After September 29, 2027 you will no longer be able to access Amazon Managed Blockchain (AMB). For more information, see [Amazon Managed Blockchain (AMB) end of support](https://docs.aws.amazon.com/managed-blockchain/latest/hyperledger-fabric-dev/managed-blockchain-end-of-support.html).

# Authentication and access control for Amazon Managed Blockchain (AMB) Access Ethereum
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IAM permissions policies are associated with AWS users in your account and determine who has access to what. Permissions policies specify the actions that each user can perform using AMB Access and other AWS services.

Before you configure IAM permissions, see [Identity and Access Management for Amazon Managed Blockchain (AMB) Access Ethereum](security-iam.md). We also recommend [What is IAM?](https://docs.aws.amazon.com/IAM/latest/UserGuide/introduction.html) and [IAM JSON Policy Reference](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies.html) in the *IAM User Guide*.