AWS Transfer Family Update: Added support for dual-stack (IPv4 and IPv6) endpoints for SFTP public endpoints and VPC-internal endpoints (SFTP, FTPS, FTP, and AS2), enabling customers to configure new servers with IPv4 or dual-stack mode, convert existing servers to dual-stack, and use IPv6 with service APIs.

AWS · AWS · commit c67dbb02b291 · 2025-06-30T18:08:09.000Z
diff --git a/.changes/next-release/feature-AWSTransferFamily-7b480bc.json b/.changes/next-release/feature-AWSTransferFamily-7b480bc.json
@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS Transfer Family",
+    "contributor": "",
+    "description": "Added support for dual-stack (IPv4 and IPv6) endpoints for SFTP public endpoints and VPC-internal endpoints (SFTP, FTPS, FTP, and AS2), enabling customers to configure new servers with IPv4 or dual-stack mode, convert existing servers to dual-stack, and use IPv6 with service APIs."
+}
diff --git a/services/transfer/src/main/resources/codegen-resources/service-2.json b/services/transfer/src/main/resources/codegen-resources/service-2.json
@@ -1464,7 +1464,7 @@
       "members":{
         "HomeDirectory":{
           "shape":"HomeDirectory",
-          "documentation":"<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> <note> <p>The <code>HomeDirectory</code> parameter is only used if <code>HomeDirectoryType</code> is set to <code>PATH</code>.</p> </note>"
+          "documentation":"<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> <note> <p>You can use the <code>HomeDirectory</code> parameter for <code>HomeDirectoryType</code> when it is set to either <code>PATH</code> or <code>LOGICAL</code>.</p> </note>"
         },
         "HomeDirectoryType":{
           "shape":"HomeDirectoryType",
@@ -1727,6 +1727,10 @@
         "S3StorageOptions":{
           "shape":"S3StorageOptions",
           "documentation":"<p>Specifies whether or not performance for your Amazon S3 directories is optimized. This is disabled by default.</p> <p>By default, home directory mappings have a <code>TYPE</code> of <code>DIRECTORY</code>. If you enable this option, you would then need to explicitly set the <code>HomeDirectoryMapEntry</code> <code>Type</code> to <code>FILE</code> if you want a mapping to have a file target.</p>"
+        },
+        "IpAddressType":{
+          "shape":"IpAddressType",
+          "documentation":"<p>Specifies whether to use IPv4 only, or to use dual-stack (IPv4 and IPv6) for your Transfer Family endpoint. The default value is <code>IPV4</code>.</p> <important> <p>The <code>IpAddressType</code> parameter has the following limitations:</p> <ul> <li> <p>It cannot be changed while the server is online. You must stop the server before modifying this parameter.</p> </li> <li> <p>It cannot be updated to <code>DUALSTACK</code> if the server has <code>AddressAllocationIds</code> specified.</p> </li> </ul> </important> <note> <p>When using <code>DUALSTACK</code> as the <code>IpAddressType</code>, you cannot set the <code>AddressAllocationIds</code> parameter for the <a href=\"https://docs.aws.amazon.com/transfer/latest/APIReference/API_EndpointDetails.html\">EndpointDetails</a> for the server.</p> </note>"
         }
       }
     },
@@ -1750,7 +1754,7 @@
       "members":{
         "HomeDirectory":{
           "shape":"HomeDirectory",
-          "documentation":"<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> <note> <p>The <code>HomeDirectory</code> parameter is only used if <code>HomeDirectoryType</code> is set to <code>PATH</code>.</p> </note>"
+          "documentation":"<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> <note> <p>You can use the <code>HomeDirectory</code> parameter for <code>HomeDirectoryType</code> when it is set to either <code>PATH</code> or <code>LOGICAL</code>.</p> </note>"
         },
         "HomeDirectoryType":{
           "shape":"HomeDirectoryType",
@@ -2481,7 +2485,7 @@
       "members":{
         "HomeDirectory":{
           "shape":"HomeDirectory",
-          "documentation":"<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> <note> <p>The <code>HomeDirectory</code> parameter is only used if <code>HomeDirectoryType</code> is set to <code>PATH</code>.</p> </note>"
+          "documentation":"<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> <note> <p>You can use the <code>HomeDirectory</code> parameter for <code>HomeDirectoryType</code> when it is set to either <code>PATH</code> or <code>LOGICAL</code>.</p> </note>"
         },
         "HomeDirectoryMappings":{
           "shape":"HomeDirectoryMappings",
@@ -2929,6 +2933,10 @@
         "As2ServiceManagedEgressIpAddresses":{
           "shape":"ServiceManagedEgressIpAddresses",
           "documentation":"<p>The list of egress IP addresses of this server. These IP addresses are only relevant for servers that use the AS2 protocol. They are used for sending asynchronous MDNs.</p> <p>These IP addresses are assigned automatically when you create an AS2 server. Additionally, if you update an existing server and add the AS2 protocol, static IP addresses are assigned as well.</p>"
+        },
+        "IpAddressType":{
+          "shape":"IpAddressType",
+          "documentation":"<p>Specifies whether to use IPv4 only, or to use dual-stack (IPv4 and IPv6) for your Transfer Family endpoint. The default value is <code>IPV4</code>.</p> <important> <p>The <code>IpAddressType</code> parameter has the following limitations:</p> <ul> <li> <p>It cannot be changed while the server is online. You must stop the server before modifying this parameter.</p> </li> <li> <p>It cannot be updated to <code>DUALSTACK</code> if the server has <code>AddressAllocationIds</code> specified.</p> </li> </ul> </important> <note> <p>When using <code>DUALSTACK</code> as the <code>IpAddressType</code>, you cannot set the <code>AddressAllocationIds</code> parameter for the <a href=\"https://docs.aws.amazon.com/transfer/latest/APIReference/API_EndpointDetails.html\">EndpointDetails</a> for the server.</p> </note>"
         }
       },
       "documentation":"<p>Describes the properties of a file transfer protocol-enabled server that was specified.</p>"
@@ -2943,7 +2951,7 @@
         },
         "HomeDirectory":{
           "shape":"HomeDirectory",
-          "documentation":"<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> <note> <p>The <code>HomeDirectory</code> parameter is only used if <code>HomeDirectoryType</code> is set to <code>PATH</code>.</p> </note>"
+          "documentation":"<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> <note> <p>You can use the <code>HomeDirectory</code> parameter for <code>HomeDirectoryType</code> when it is set to either <code>PATH</code> or <code>LOGICAL</code>.</p> </note>"
         },
         "HomeDirectoryMappings":{
           "shape":"HomeDirectoryMappings",
@@ -3166,7 +3174,7 @@
       "members":{
         "AddressAllocationIds":{
           "shape":"AddressAllocationIds",
-          "documentation":"<p>A list of address allocation IDs that are required to attach an Elastic IP address to your server's endpoint.</p> <p>An address allocation ID corresponds to the allocation ID of an Elastic IP address. This value can be retrieved from the <code>allocationId</code> field from the Amazon EC2 <a href=\"https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_Address.html\">Address</a> data type. One way to retrieve this value is by calling the EC2 <a href=\"https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeAddresses.html\">DescribeAddresses</a> API.</p> <p>This parameter is optional. Set this parameter if you want to make your VPC endpoint public-facing. For details, see <a href=\"https://docs.aws.amazon.com/transfer/latest/userguide/create-server-in-vpc.html#create-internet-facing-endpoint\">Create an internet-facing endpoint for your server</a>.</p> <note> <p>This property can only be set as follows:</p> <ul> <li> <p> <code>EndpointType</code> must be set to <code>VPC</code> </p> </li> <li> <p>The Transfer Family server must be offline.</p> </li> <li> <p>You cannot set this parameter for Transfer Family servers that use the FTP protocol.</p> </li> <li> <p>The server must already have <code>SubnetIds</code> populated (<code>SubnetIds</code> and <code>AddressAllocationIds</code> cannot be updated simultaneously).</p> </li> <li> <p> <code>AddressAllocationIds</code> can't contain duplicates, and must be equal in length to <code>SubnetIds</code>. For example, if you have three subnet IDs, you must also specify three address allocation IDs.</p> </li> <li> <p>Call the <code>UpdateServer</code> API to set or change this parameter.</p> </li> </ul> </note>"
+          "documentation":"<p>A list of address allocation IDs that are required to attach an Elastic IP address to your server's endpoint.</p> <p>An address allocation ID corresponds to the allocation ID of an Elastic IP address. This value can be retrieved from the <code>allocationId</code> field from the Amazon EC2 <a href=\"https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_Address.html\">Address</a> data type. One way to retrieve this value is by calling the EC2 <a href=\"https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeAddresses.html\">DescribeAddresses</a> API.</p> <p>This parameter is optional. Set this parameter if you want to make your VPC endpoint public-facing. For details, see <a href=\"https://docs.aws.amazon.com/transfer/latest/userguide/create-server-in-vpc.html#create-internet-facing-endpoint\">Create an internet-facing endpoint for your server</a>.</p> <note> <p>This property can only be set as follows:</p> <ul> <li> <p> <code>EndpointType</code> must be set to <code>VPC</code> </p> </li> <li> <p>The Transfer Family server must be offline.</p> </li> <li> <p>You cannot set this parameter for Transfer Family servers that use the FTP protocol.</p> </li> <li> <p>The server must already have <code>SubnetIds</code> populated (<code>SubnetIds</code> and <code>AddressAllocationIds</code> cannot be updated simultaneously).</p> </li> <li> <p> <code>AddressAllocationIds</code> can't contain duplicates, and must be equal in length to <code>SubnetIds</code>. For example, if you have three subnet IDs, you must also specify three address allocation IDs.</p> </li> <li> <p>Call the <code>UpdateServer</code> API to set or change this parameter.</p> </li> <li> <p>You can't set address allocation IDs for servers that have an <code>IpAddressType</code> set to <code>DUALSTACK</code> You can only set this property if <code>IpAddressType</code> is set to <code>IPV4</code>.</p> </li> </ul> </note>"
         },
         "SubnetIds":{
           "shape":"SubnetIds",
@@ -3633,6 +3641,13 @@
       "documentation":"<p>This exception is thrown when the client submits a malformed request.</p>",
       "exception":true
     },
+    "IpAddressType":{
+      "type":"string",
+      "enum":[
+        "IPV4",
+        "DUALSTACK"
+      ]
+    },
     "ListAccessesRequest":{
       "type":"structure",
       "required":["ServerId"],
@@ -4093,7 +4108,7 @@
       "members":{
         "HomeDirectory":{
           "shape":"HomeDirectory",
-          "documentation":"<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> <note> <p>The <code>HomeDirectory</code> parameter is only used if <code>HomeDirectoryType</code> is set to <code>PATH</code>.</p> </note>"
+          "documentation":"<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> <note> <p>You can use the <code>HomeDirectory</code> parameter for <code>HomeDirectoryType</code> when it is set to either <code>PATH</code> or <code>LOGICAL</code>.</p> </note>"
         },
         "HomeDirectoryType":{
           "shape":"HomeDirectoryType",
@@ -4356,7 +4371,7 @@
         },
         "HomeDirectory":{
           "shape":"HomeDirectory",
-          "documentation":"<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> <note> <p>The <code>HomeDirectory</code> parameter is only used if <code>HomeDirectoryType</code> is set to <code>PATH</code>.</p> </note>"
+          "documentation":"<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> <note> <p>You can use the <code>HomeDirectory</code> parameter for <code>HomeDirectoryType</code> when it is set to either <code>PATH</code> or <code>LOGICAL</code>.</p> </note>"
         },
         "HomeDirectoryType":{
           "shape":"HomeDirectoryType",
@@ -5044,7 +5059,7 @@
       "type":"string",
       "max":32,
       "min":0,
-      "pattern":"\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}"
+      "pattern":"[0-9a-fA-F\\.\\:]+"
     },
     "SshPublicKey":{
       "type":"structure",
@@ -5496,7 +5511,7 @@
       "members":{
         "HomeDirectory":{
           "shape":"HomeDirectory",
-          "documentation":"<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> <note> <p>The <code>HomeDirectory</code> parameter is only used if <code>HomeDirectoryType</code> is set to <code>PATH</code>.</p> </note>"
+          "documentation":"<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> <note> <p>You can use the <code>HomeDirectory</code> parameter for <code>HomeDirectoryType</code> when it is set to either <code>PATH</code> or <code>LOGICAL</code>.</p> </note>"
         },
         "HomeDirectoryType":{
           "shape":"HomeDirectoryType",
@@ -5807,6 +5822,10 @@
         "S3StorageOptions":{
           "shape":"S3StorageOptions",
           "documentation":"<p>Specifies whether or not performance for your Amazon S3 directories is optimized. This is disabled by default.</p> <p>By default, home directory mappings have a <code>TYPE</code> of <code>DIRECTORY</code>. If you enable this option, you would then need to explicitly set the <code>HomeDirectoryMapEntry</code> <code>Type</code> to <code>FILE</code> if you want a mapping to have a file target.</p>"
+        },
+        "IpAddressType":{
+          "shape":"IpAddressType",
+          "documentation":"<p>Specifies whether to use IPv4 only, or to use dual-stack (IPv4 and IPv6) for your Transfer Family endpoint. The default value is <code>IPV4</code>.</p> <important> <p>The <code>IpAddressType</code> parameter has the following limitations:</p> <ul> <li> <p>It cannot be changed while the server is online. You must stop the server before modifying this parameter.</p> </li> <li> <p>It cannot be updated to <code>DUALSTACK</code> if the server has <code>AddressAllocationIds</code> specified.</p> </li> </ul> </important> <note> <p>When using <code>DUALSTACK</code> as the <code>IpAddressType</code>, you cannot set the <code>AddressAllocationIds</code> parameter for the <a href=\"https://docs.aws.amazon.com/transfer/latest/APIReference/API_EndpointDetails.html\">EndpointDetails</a> for the server.</p> </note>"
         }
       }
     },
@@ -5829,7 +5848,7 @@
       "members":{
         "HomeDirectory":{
           "shape":"HomeDirectory",
-          "documentation":"<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> <note> <p>The <code>HomeDirectory</code> parameter is only used if <code>HomeDirectoryType</code> is set to <code>PATH</code>.</p> </note>"
+          "documentation":"<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> <note> <p>You can use the <code>HomeDirectory</code> parameter for <code>HomeDirectoryType</code> when it is set to either <code>PATH</code> or <code>LOGICAL</code>.</p> </note>"
         },
         "HomeDirectoryType":{
           "shape":"HomeDirectoryType",
