This article explains how to authorize NFS clients outside AWS to access Amazon EFS using IAM Roles Anywhere with X.509 certificates for temporary credential retrieval.

• IAM Roles Anywhere exchanges X.509 certificates for temporary AWS credentials for hybrid workloads
• EFS mount helper requires tls and iam options; uses AWS CLI credential process to retrieve temporary credentials
• Solution uses certificate-based authentication combined with IAM resource policies for secure access control
• Detailed walkthrough covers CloudFormation deployment, AWS CLI configuration, hosts file updates, and EFS mounting
• Security best practices include restricting certificates via X.509 attributes and using IAM Roles Anywhere VPC endpoints
• Enables single file system share between cloud and on-premises resources with IAM-based authorization

This guide provides a secure method for on-premises servers to access Amazon EFS using temporary credentials and certificate-based authentication instead of long-term IAM user credentials.