This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::IoT::DomainConfiguration TlsConfig
<a name="aws-properties-iot-domainconfiguration-tlsconfig"></a>

An object that specifies the TLS configuration for a domain.

## Syntax
<a name="aws-properties-iot-domainconfiguration-tlsconfig-syntax"></a>

To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-iot-domainconfiguration-tlsconfig-syntax.json"></a>

```
{
  "[SecurityPolicy](#cfn-iot-domainconfiguration-tlsconfig-securitypolicy)" : String
}
```

### YAML
<a name="aws-properties-iot-domainconfiguration-tlsconfig-syntax.yaml"></a>

```
  [SecurityPolicy](#cfn-iot-domainconfiguration-tlsconfig-securitypolicy): String
```

## Properties
<a name="aws-properties-iot-domainconfiguration-tlsconfig-properties"></a>

`SecurityPolicy`  <a name="cfn-iot-domainconfiguration-tlsconfig-securitypolicy"></a>
The security policy for a domain configuration. For more information, see [Security policies ](https://docs.amazonaws.cn/iot/latest/developerguide/transport-security.html#tls-policy-table) in the *Amazon IoT Core developer guide*.  
*Required*: No  
*Type*: String  
*Maximum*: `128`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)