Corporate user browses to the ADFS portal sign-in page and provides Active Directory authentication credentials.The workflow includes the following steps: Here is a diagram of the solution architecture. We also show you how you can use the SSMSessionRunAs tag to enable run as support for Session Manager sessions started by federated users. In this post, we will walk you through the steps to pass the AD username attribute to the SAML assertion and use it to apply the SSMSessionRunAs tag to the STS Session using Active Directory Federation Services (ADFS). For more information about pass-in attributes for federated users, see the New for Identity Federation – Use Employee Attributes for Access Control in AWS blog post. You can configure your identity provider (IdP) to pass the user attribute during federation and the session will be tagged using the attribute value. In this case, you can apply SSMSessionRunAs tag as a Principal tag to the STS session when your users federate into AWS, using standards-based SAML. You cannot tag the role with multiple values for SSMSessionRunAs tag. When it comes to the case of federated users, multiple users could assume the same role. This works perfectly for individual IAM users and roles. Using this method, you can specify a different OS account name for each IAM user or role you tag or use the same OS user name for them all. Method 2: Tag an IAM user or role (recommended) Using this method, all sessions are run by the same OS user for all the AWS Identity and Access Management (IAM) users in your account who connect to the instance using Session Manager. Method 1: Specify an OS user name in Session Manager preferences Session Manager provides two methods for specifying the operating system account to use. You can configure run as support for Linux instances in the Session Manager preferences. On instances running Linux, you can optionally launch sessions using the credentials of an operating system account. Session Manager provides secure instance management without the need to open inbound ports, maintain bastion hosts, or manage SSH keys.īy default, sessions are launched using the credentials of a system-generated ssm-user account that is created on a managed instance. Session Manager is an AWS Systems Manager capability that lets you manage your Amazon Elastic Compute Cloud (Amazon EC2) instances, on-premises instances, and virtual machines (VMs) through an interactive one-click browser-based shell or through the AWS CLI. We show you how to start a Session Manager session using the AD user name of the federated user on an AD-joined Linux instance. In this blog post, we share a procedure for configuring AWS Systems Manager Session Manager run as support for Active Directory (AD) federated users using AWS Security Token Service (AWS STS) session tags.
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