![]() No open inbound ports and no need to manage bastion hosts or SSH keys Using only AWS Identity and Access Management (IAM) policies, you can control which individual users or groups in your organisation can use Session Manager and which managed nodes they can access. Centralised access control to managed nodes using IAM policiesĪdministrators have a single place to grant and revoke access to managed nodes. You can take advantage of inventory management (see what packages are installed) and leverage patch manager to keep up consistency across your VM's for compliance. Session Manager can be used with the SSM Agent running in on-premise or even on other clouds Virtual Machines. How Can Session Manager Benefit My Organisation? Use Anywhere Configure sessions on the Session Manager Preferences page.You can log session commands and details in an Amazon S3 bucket or CloudWatch Logs log group.Sessions are secured using an AWS Key Management Service key.Connect to your instance without SSH keys or a bastion host.With the aid of VPC Endpoints, all Systems Manager functions can be used without outbound Internet Access. Furthermore, there is no requirement to even have Internet access into the VPC where those resources are. The result? No requirement for bastion host and no requirement for allowing inbound communication into remote resources. When executing a remote session using Session Manager, it establishes a session using the already established secure shell session. The client establishes an outbound HTTPS (secure shell) connection back to the Systems Manager service. Session Manager relies on the Systems Manager Client to be running on the remote resource. Session Manager is an interactive view of the remote resource whereas Run Command is used for running ad-hoc commands. Session Manager is just one service of many that comprise the AWS Systems Manager service and has close relation to the Run Command service. From the above diagram it is easy to see that if the bastion host becomes compromised, so too can the remote resources.
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