# Infrastructure **Topics** + [Access a bastion host by using Session Manager and Amazon EC2 Instance Connect](access-a-bastion-host-by-using-session-manager-and-amazon-ec2-instance-connect.md) + [Centralize DNS resolution by using AWS Managed Microsoft AD and on-premises Microsoft Active Directory](centralize-dns-resolution-by-using-aws-managed-microsoft-ad-and-on-premises-microsoft-active-directory.md) + [Centralize monitoring by using Amazon CloudWatch Observability Access Manager](centralize-monitoring-by-using-amazon-cloudwatch-observability-access-manager.md) + [Check EC2 instances for mandatory tags at launch](check-ec2-instances-for-mandatory-tags-at-launch.md) + [Clean up AWS Account Factory for Terraform (AFT) resources safely after state file loss](clean-up-aft-resources-safely-after-state-file-loss.md) + [Create a pipeline in AWS Regions that don’t support AWS CodePipeline](create-a-pipeline-in-aws-regions-that-don-t-support-aws-codepipeline.md) + [Customize default role names by using AWS CDK aspects and escape hatches](customize-default-role-names-by-using-aws-cdk-aspects-and-escape-hatches.md) + [Deploy a Cassandra cluster on Amazon EC2 with private static IPs to avoid rebalancing](deploy-a-cassandra-cluster-on-amazon-ec2-with-private-static-ips-to-avoid-rebalancing.md) + [Extend VRFs to AWS by using AWS Transit Gateway Connect](extend-vrfs-to-aws-by-using-aws-transit-gateway-connect.md) + [Get Amazon SNS notifications when the key state of an AWS KMS key changes](get-amazon-sns-notifications-when-the-key-state-of-an-aws-kms-key-changes.md) + [Preserve routable IP space in multi-account VPC designs for non-workload subnets](preserve-routable-ip-space-in-multi-account-vpc-designs-for-non-workload-subnets.md) + [Provision a Terraform product in AWS Service Catalog by using a code repository](provision-a-terraform-product-in-aws-service-catalog-by-using-a-code-repository.md) + [Register multiple AWS accounts with a single email address by using Amazon SES](register-multiple-aws-accounts-with-a-single-email-address-by-using-amazon-ses.md) + [Set up DNS resolution for hybrid networks in a single-account AWS environment](set-up-dns-resolution-for-hybrid-networks-in-a-single-account-aws-environment.md) + [Set up UiPath RPA bots automatically on Amazon EC2 by using AWS CloudFormation](set-up-uipath-rpa-bots-automatically-on-amazon-ec2-by-using-aws-cloudformation.md) + [Set up a highly available PeopleSoft architecture on AWS](set-up-a-highly-available-peoplesoft-architecture-on-aws.md) + [Set up disaster recovery for Oracle JD Edwards EnterpriseOne with AWS Elastic Disaster Recovery](set-up-disaster-recovery-for-oracle-jd-edwards-enterpriseone-with-aws-elastic-disaster-recovery.md) + [Set up CloudFormation drift detection in a multi-Region, multi-account organization](set-up-aws-cloudformation-drift-detection-in-a-multi-region-multi-account-organization.md) + [Successfully import an S3 bucket as an AWS CloudFormation stack](successfully-import-an-s3-bucket-as-an-aws-cloudformation-stack.md) + [Synchronize data between Amazon EFS file systems in different AWS Regions by using AWS DataSync](synchronize-data-between-amazon-efs-file-systems-in-different-aws-regions-by-using-aws-datasync.md) + [Test AWS infrastructure by using LocalStack and Terraform Tests](test-aws-infra-localstack-terraform.md) + [Upgrade SAP Pacemaker clusters from ENSA1 to ENSA2](upgrade-sap-pacemaker-clusters-from-ensa1-to-ensa2.md) + [Use consistent Availability Zones in VPCs across different AWS accounts](use-consistent-availability-zones-in-vpcs-across-different-aws-accounts.md) + [Use user IDs in IAM policies for access control and automation](use-user-ids-iam-policies-access-control-automation.md) + [Validate Account Factory for Terraform (AFT) code locally](validate-account-factory-for-terraform-aft-code-locally.md) + [More patterns](infrastructure-more-patterns-pattern-list.md)