# ViewerMtlsConfig
<a name="API_ViewerMtlsConfig"></a>

A viewer mTLS configuration.

## Contents
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 ** Mode **   <a name="cloudfront-Type-ViewerMtlsConfig-Mode"></a>
The viewer mTLS mode.  
Type: String  
Valid Values: `required | optional`   
Required: No

 ** TrustStoreConfig **   <a name="cloudfront-Type-ViewerMtlsConfig-TrustStoreConfig"></a>
The trust store configuration associated with the viewer mTLS configuration.  
Type: [TrustStoreConfig](API_TrustStoreConfig.md) object  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/cloudfront-2020-05-31/ViewerMtlsConfig) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/cloudfront-2020-05-31/ViewerMtlsConfig) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/cloudfront-2020-05-31/ViewerMtlsConfig)