This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).
# AWS::EC2::ClientVpnEndpoint ClientAuthenticationRequest

Describes the authentication method to be used by a Client VPN endpoint. For more information, see [Authentication](https://docs.aws.amazon.com/vpn/latest/clientvpn-admin/authentication-authrization.html#client-authentication) in the *AWS Client VPN Administrator Guide*.
## Syntax

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

```
{
 "[ActiveDirectory](#cfn-ec2-clientvpnendpoint-clientauthenticationrequest-activedirectory)" : {{DirectoryServiceAuthenticationRequest}},
 "[FederatedAuthentication](#cfn-ec2-clientvpnendpoint-clientauthenticationrequest-federatedauthentication)" : {{FederatedAuthenticationRequest}},
 "[MutualAuthentication](#cfn-ec2-clientvpnendpoint-clientauthenticationrequest-mutualauthentication)" : {{CertificateAuthenticationRequest}},
 "[Type](#cfn-ec2-clientvpnendpoint-clientauthenticationrequest-type)" : {{String}}
}
```
### YAML

```
 [ActiveDirectory](#cfn-ec2-clientvpnendpoint-clientauthenticationrequest-activedirectory): {{
 DirectoryServiceAuthenticationRequest}}
 [FederatedAuthentication](#cfn-ec2-clientvpnendpoint-clientauthenticationrequest-federatedauthentication): {{
 FederatedAuthenticationRequest}}
 [MutualAuthentication](#cfn-ec2-clientvpnendpoint-clientauthenticationrequest-mutualauthentication): {{
 CertificateAuthenticationRequest}}
 [Type](#cfn-ec2-clientvpnendpoint-clientauthenticationrequest-type): {{String}}
```
## Properties

`ActiveDirectory` 
Information about the Active Directory to be used, if applicable. You must provide this information if **Type** is `directory-service-authentication`. 
*Required*: No 
*Type*: [DirectoryServiceAuthenticationRequest](aws-properties-ec2-clientvpnendpoint-directoryserviceauthenticationrequest.md) 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`FederatedAuthentication` 
Information about the IAM SAML identity provider, if applicable. 
*Required*: No 
*Type*: [FederatedAuthenticationRequest](aws-properties-ec2-clientvpnendpoint-federatedauthenticationrequest.md) 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`MutualAuthentication` 
Information about the authentication certificates to be used, if applicable. You must provide this information if **Type** is `certificate-authentication`. 
*Required*: No 
*Type*: [CertificateAuthenticationRequest](aws-properties-ec2-clientvpnendpoint-certificateauthenticationrequest.md) 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`Type` 
The type of client authentication to be used. 
*Required*: Yes 
*Type*: String 
*Allowed values*: `certificate-authentication | directory-service-authentication | federated-authentication` 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)</div><div class="naked_ctrl">
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