# ModifyPrivateDnsNameOptions
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Modifies the options for instance hostnames for the specified instance.

## Request Parameters
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The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see [Common Query Parameters](CommonParameters.md).

 **DryRun**   
Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is `DryRunOperation`. Otherwise, it is `UnauthorizedOperation`.  
Type: Boolean  
Required: No

 **EnableResourceNameDnsAAAARecord**   
Indicates whether to respond to DNS queries for instance hostnames with DNS AAAA records.  
Type: Boolean  
Required: No

 **EnableResourceNameDnsARecord**   
Indicates whether to respond to DNS queries for instance hostnames with DNS A records.  
Type: Boolean  
Required: No

 **InstanceId**   
The ID of the instance.  
Type: String  
Required: Yes

 **PrivateDnsHostnameType**   
The type of hostname for EC2 instances. For IPv4 only subnets, an instance DNS name must be based on the instance IPv4 address. For IPv6 only subnets, an instance DNS name must be based on the instance ID. For dual-stack subnets, you can specify whether DNS names use the instance IPv4 address or the instance ID.  
Type: String  
Valid Values: `ip-name | resource-name`   
Required: No

## Response Elements
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The following elements are returned by the service.

 **requestId**   
The ID of the request.  
Type: String

 **return**   
Returns `true` if the request succeeds; otherwise, it returns an error.  
Type: Boolean

## Errors
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For information about the errors that are common to all actions, see [Common client error codes](errors-overview.md#CommonErrors).

## See Also
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For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/ec2-2016-11-15/ModifyPrivateDnsNameOptions) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/ec2-2016-11-15/ModifyPrivateDnsNameOptions) 
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/ec2-2016-11-15/ModifyPrivateDnsNameOptions) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/ec2-2016-11-15/ModifyPrivateDnsNameOptions) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/ec2-2016-11-15/ModifyPrivateDnsNameOptions) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/ec2-2016-11-15/ModifyPrivateDnsNameOptions) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/ec2-2016-11-15/ModifyPrivateDnsNameOptions) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/ec2-2016-11-15/ModifyPrivateDnsNameOptions) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/ec2-2016-11-15/ModifyPrivateDnsNameOptions) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/ec2-2016-11-15/ModifyPrivateDnsNameOptions)