DescribedServer - Amazon Transfer Family
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Describes the properties of a file transfer protocol-enabled server that was specified.



Specifies the unique Amazon Resource Name (ARN) of the server.

Type: String

Length Constraints: Minimum length of 20. Maximum length of 1600.

Pattern: arn:.*

Required: Yes


Specifies the ARN of the AmazonCertificate Manager (ACM) certificate. Required when Protocols is set to FTPS.

Type: String

Length Constraints: Maximum length of 1600.

Required: No


Specifies the domain of the storage system that is used for file transfers.

Type: String

Valid Values: S3 | EFS

Required: No


The virtual private cloud (VPC) endpoint settings that are configured for your server. When you host your endpoint within your VPC, you can make your endpoint accessible only to resources within your VPC, or you can attach Elastic IP addresses and make your endpoint accessible to clients over the internet. Your VPC's default security groups are automatically assigned to your endpoint.

Type: EndpointDetails object

Required: No


Defines the type of endpoint that your server is connected to. If your server is connected to a VPC endpoint, your server isn't accessible over the public internet.

Type: String


Required: No


Specifies the Base64-encoded SHA256 fingerprint of the server's host key. This value is equivalent to the output of the ssh-keygen -l -f my-new-server-key command.

Type: String

Required: No


Specifies information to call a customer-supplied authentication API. This field is not populated when the IdentityProviderType of a server is AWS_DIRECTORY_SERVICE or SERVICE_MANAGED.

Type: IdentityProviderDetails object

Required: No


The mode of authentication for a server. The default value is SERVICE_MANAGED, which allows you to store and access user credentials within the Amazon Transfer Family service.

Use AWS_DIRECTORY_SERVICE to provide access to Active Directory groups in Amazon Directory Service for Microsoft Active Directory or Microsoft Active Directory in your on-premises environment or in Amazon using AD Connector. This option also requires you to provide a Directory ID by using the IdentityProviderDetails parameter.

Use the API_GATEWAY value to integrate with an identity provider of your choosing. The API_GATEWAY setting requires you to provide an Amazon API Gateway endpoint URL to call for authentication by using the IdentityProviderDetails parameter.

Use the AWS_LAMBDA value to directly use an Amazon Lambda function as your identity provider. If you choose this value, you must specify the ARN for the Lambda function in the Function parameter or the IdentityProviderDetails data type.

Type: String


Required: No


The Amazon Resource Name (ARN) of the Amazon Identity and Access Management (IAM) role that allows a server to turn on Amazon CloudWatch logging for Amazon S3 or Amazon EFSevents. When set, you can view user activity in your CloudWatch logs.

Type: String

Length Constraints: Minimum length of 20. Maximum length of 2048.

Pattern: arn:.*role/.*

Required: No


Specifies a string to display when users connect to a server. This string is displayed after the user authenticates.


The SFTP protocol does not support post-authentication display banners.

Type: String

Length Constraints: Maximum length of 512.

Pattern: [\x09-\x0D\x20-\x7E]*

Required: No


Specifies a string to display when users connect to a server. This string is displayed before the user authenticates. For example, the following banner displays details about using the system:

This system is for the use of authorized users only. Individuals using this computer system without authority, or in excess of their authority, are subject to having all of their activities on this system monitored and recorded by system personnel.

Type: String

Length Constraints: Maximum length of 512.

Pattern: [\x09-\x0D\x20-\x7E]*

Required: No


The protocol settings that are configured for your server.

  • To indicate passive mode (for FTP and FTPS protocols), use the PassiveIp parameter. Enter a single dotted-quad IPv4 address, such as the external IP address of a firewall, router, or load balancer.

  • To ignore the error that is generated when the client attempts to use the SETSTAT command on a file that you are uploading to an Amazon S3 bucket, use the SetStatOption parameter. To have the Amazon Transfer Family server ignore the SETSTAT command and upload files without needing to make any changes to your SFTP client, set the value to ENABLE_NO_OP. If you set the SetStatOption parameter to ENABLE_NO_OP, Transfer Family generates a log entry to Amazon CloudWatch Logs, so that you can determine when the client is making a SETSTAT call.

  • To determine whether your Amazon Transfer Family server resumes recent, negotiated sessions through a unique session ID, use the TlsSessionResumptionMode parameter.

  • As2Transports indicates the transport method for the AS2 messages. Currently, only HTTP is supported.

Type: ProtocolDetails object

Required: No


Specifies the file transfer protocol or protocols over which your file transfer protocol client can connect to your server's endpoint. The available protocols are:

  • SFTP (Secure Shell (SSH) File Transfer Protocol): File transfer over SSH

  • FTPS (File Transfer Protocol Secure): File transfer with TLS encryption

  • FTP (File Transfer Protocol): Unencrypted file transfer

  • AS2 (Applicability Statement 2): used for transporting structured business-to-business data

  • If you select FTPS, you must choose a certificate stored in Amazon Certificate Manager (ACM) which is used to identify your server when clients connect to it over FTPS.

  • If Protocol includes either FTP or FTPS, then the EndpointType must be VPC and the IdentityProviderType must be AWS_DIRECTORY_SERVICE or API_GATEWAY.

  • If Protocol includes FTP, then AddressAllocationIds cannot be associated.

  • If Protocol is set only to SFTP, the EndpointType can be set to PUBLIC and the IdentityProviderType can be set to SERVICE_MANAGED.

  • If Protocol includes AS2, then the EndpointType must be VPC, and domain must be Amazon S3.

Type: Array of strings

Array Members: Minimum number of 1 item. Maximum number of 4 items.

Valid Values: SFTP | FTP | FTPS | AS2

Required: No


Specifies the name of the security policy that is attached to the server.

Type: String

Length Constraints: Maximum length of 100.

Pattern: TransferSecurityPolicy-.+

Required: No


Specifies the unique system-assigned identifier for a server that you instantiate.

Type: String

Length Constraints: Fixed length of 19.

Pattern: ^s-([0-9a-f]{17})$

Required: No


The condition of the server that was described. A value of ONLINE indicates that the server can accept jobs and transfer files. A State value of OFFLINE means that the server cannot perform file transfer operations.

The states of STARTING and STOPPING indicate that the server is in an intermediate state, either not fully able to respond, or not fully offline. The values of START_FAILED or STOP_FAILED can indicate an error condition.

Type: String


Required: No


Specifies the key-value pairs that you can use to search for and group servers that were assigned to the server that was described.

Type: Array of Tag objects

Array Members: Minimum number of 1 item. Maximum number of 50 items.

Required: No


Specifies the number of users that are assigned to a server you specified with the ServerId.

Type: Integer

Required: No


Specifies the workflow ID for the workflow to assign and the execution role that's used for executing the workflow.

Type: WorkflowDetails object

Required: No

See Also

For more information about using this API in one of the language-specific Amazon SDKs, see the following: