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latestOpenAPI 3.0.0Apache 2.0 License2026-07-1458293303.1 KB

Used by administrators to choose which groups in the directory should have access to upload and download files over the enabled protocols using Transfer Family. For example, a Microsoft Active Directory might contain 50,000 users, but only a small fraction might need the ability to transfer files to the server. An administrator can use <code>CreateAccess</code> to limit the access to the correct set of users who need this ability.

post/#X-Amz-Target=TransferService.CreateAccess

Headers

X-Amz-Target'TransferService.CreateAccess' required

Request body

HomeDirectorystring
<p>The landing directory (folder) for a user when they log in to the server using the client.</p> <p>A <code>HomeDirectory</code> example is <code>/bucket_name/home/mydirectory</code>.</p>
HomeDirectoryType'PATH' | 'LOGICAL'

The type of landing directory (folder) that you want your users' home directory to be when they log in to the server. If you set it to <code>PATH</code>, the user will see the absolute Amazon S3 bucket or EFS paths as is in their file transfer protocol clients. If you set it <code>LOGICAL</code>, you need to provide mappings in the <code>HomeDirectoryMappings</code> for how you want to make Amazon S3 or Amazon EFS paths visible to your users.

Policystring
<p>A session policy for your user so that you can use the same Identity and Access Management (IAM) role across multiple users. This policy scopes down a user's access to portions of their Amazon S3 bucket. Variables that you can use inside this policy include <code>${Transfer:UserName}</code>, <code>${Transfer:HomeDirectory}</code>, and <code>${Transfer:HomeBucket}</code>.</p> <note> <p>This policy applies only when the domain of <code>ServerId</code> is Amazon S3. Amazon EFS does not use session policies.</p> <p>For session policies, Transfer Family stores the policy as a JSON blob, instead of the Amazon Resource Name (ARN) of the policy. You save the policy as a JSON blob and pass it in the <code>Policy</code> argument.</p> <p>For an example of a session policy, see <a href="https://docs.aws.amazon.com/transfer/latest/userguide/session-policy.html">Example session policy</a>.</p> <p>For more information, see <a href="https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html">AssumeRole</a> in the <i>Security Token Service API Reference</i>.</p> </note>
Rolestring required

The Amazon Resource Name (ARN) of the Identity and Access Management (IAM) role that controls your users' access to your Amazon S3 bucket or Amazon EFS file system. The policies attached to this role determine the level of access that you want to provide your users when transferring files into and out of your Amazon S3 bucket or Amazon EFS file system. The IAM role should also contain a trust relationship that allows the server to access your resources when servicing your users' transfer requests.

ServerIdstring required

A system-assigned unique identifier for a server instance. This is the specific server that you added your user to.

ExternalIdstring required
<p>A unique identifier that is required to identify specific groups within your directory. The users of the group that you associate have access to your Amazon S3 or Amazon EFS resources over the enabled protocols using Transfer Family. If you know the group name, you can view the SID values by running the following command using Windows PowerShell.</p> <p> <code>Get-ADGroup -Filter {samAccountName -like "<i>YourGroupName</i>*"} -Properties * | Select SamAccountName,ObjectSid</code> </p> <p>In that command, replace <i>YourGroupName</i> with the name of your Active Directory group.</p> <p>The regular expression used to validate this parameter is a string of characters consisting of uppercase and lowercase alphanumeric characters with no spaces. You can also include underscores or any of the following characters: =,.@:/-</p>

Response

Success

ServerIdstring required

The identifier of the server that the user is attached to.

ExternalIdstring required

The external identifier of the group whose users have access to your Amazon S3 or Amazon EFS resources over the enabled protocols using Transfer Family.

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