# ListenerAttribute
<a name="API_ListenerAttribute"></a>

Information about a listener attribute.

## Contents
<a name="API_ListenerAttribute_Contents"></a>

 ** Key **   
The name of the attribute.  
The following attribute is supported by Network Load Balancers, and Gateway Load Balancers.  
+  `tcp.idle_timeout.seconds` - The tcp idle timeout value, in seconds. The valid range is 60-6000 seconds. The default is 350 seconds.
The following attributes are only supported by Application Load Balancers.  
+  `routing.http.request.x_amzn_mtls_clientcert_serial_number.header_name` - Enables you to modify the header name of the **X-Amzn-Mtls-Clientcert-Serial-Number** HTTP request header.
+  `routing.http.request.x_amzn_mtls_clientcert_issuer.header_name` - Enables you to modify the header name of the **X-Amzn-Mtls-Clientcert-Issuer** HTTP request header.
+  `routing.http.request.x_amzn_mtls_clientcert_subject.header_name` - Enables you to modify the header name of the **X-Amzn-Mtls-Clientcert-Subject** HTTP request header.
+  `routing.http.request.x_amzn_mtls_clientcert_validity.header_name` - Enables you to modify the header name of the **X-Amzn-Mtls-Clientcert-Validity** HTTP request header.
+  `routing.http.request.x_amzn_mtls_clientcert_leaf.header_name` - Enables you to modify the header name of the **X-Amzn-Mtls-Clientcert-Leaf** HTTP request header.
+  `routing.http.request.x_amzn_mtls_clientcert.header_name` - Enables you to modify the header name of the **X-Amzn-Mtls-Clientcert** HTTP request header.
+  `routing.http.request.x_amzn_tls_version.header_name` - Enables you to modify the header name of the **X-Amzn-Tls-Version** HTTP request header.
+  `routing.http.request.x_amzn_tls_cipher_suite.header_name` - Enables you to modify the header name of the **X-Amzn-Tls-Cipher-Suite** HTTP request header.
+  `routing.http.response.server.enabled` - Enables you to allow or remove the HTTP response server header.
+  `routing.http.response.strict_transport_security.header_value` - Informs browsers that the site should only be accessed using HTTPS, and that any future attempts to access it using HTTP should automatically be converted to HTTPS.
+  `routing.http.response.access_control_allow_origin.header_value` - Specifies which origins are allowed to access the server.
+  `routing.http.response.access_control_allow_methods.header_value` - Returns which HTTP methods are allowed when accessing the server from a different origin.
+  `routing.http.response.access_control_allow_headers.header_value` - Specifies which headers can be used during the request.
+  `routing.http.response.access_control_allow_credentials.header_value` - Indicates whether the browser should include credentials such as cookies or authentication when making requests.
+  `routing.http.response.access_control_expose_headers.header_value` - Returns which headers the browser can expose to the requesting client.
+  `routing.http.response.access_control_max_age.header_value` - Specifies how long the results of a preflight request can be cached, in seconds.
+  `routing.http.response.content_security_policy.header_value` - Specifies restrictions enforced by the browser to help minimize the risk of certain types of security threats.
+  `routing.http.response.x_content_type_options.header_value` - Indicates whether the MIME types advertised in the **Content-Type** headers should be followed and not be changed.
+  `routing.http.response.x_frame_options.header_value` - Indicates whether the browser is allowed to render a page in a **frame**, **iframe**, **embed** or **object**.
Type: String  
Length Constraints: Maximum length of 256.  
Pattern: `^[a-zA-Z0-9._]+$`   
Required: No

 ** Value **   
The value of the attribute.  
Type: String  
Required: No

## See Also
<a name="API_ListenerAttribute_SeeAlso"></a>

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/elasticloadbalancingv2-2015-12-01/ListenerAttribute) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/elasticloadbalancingv2-2015-12-01/ListenerAttribute) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/elasticloadbalancingv2-2015-12-01/ListenerAttribute)