# ClientVpnAuthenticationRequest
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*.
## Contents
** ActiveDirectory **
Information about the Active Directory to be used, if applicable. You must provide this information if **Type** is `directory-service-authentication`.
Type: [DirectoryServiceAuthenticationRequest](API_DirectoryServiceAuthenticationRequest.md) object
Required: No
** FederatedAuthentication **
Information about the IAM SAML identity provider to be used, if applicable. You must provide this information if **Type** is `federated-authentication`.
Type: [FederatedAuthenticationRequest](API_FederatedAuthenticationRequest.md) object
Required: No
** MutualAuthentication **
Information about the authentication certificates to be used, if applicable. You must provide this information if **Type** is `certificate-authentication`.
Type: [CertificateAuthenticationRequest](API_CertificateAuthenticationRequest.md) object
Required: No
** Type **
The type of client authentication to be used.
Type: String
Valid Values: `certificate-authentication | directory-service-authentication | federated-authentication`
Required: No
## See Also
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/ec2-2016-11-15/ClientVpnAuthenticationRequest)
+ [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ec2-2016-11-15/ClientVpnAuthenticationRequest)
+ [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ec2-2016-11-15/ClientVpnAuthenticationRequest)