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AWS Documentation » AWS CloudFormation » User Guide » CloudFront Resource Type Reference » AWS::CloudFront::Distribution » AWS::CloudFront::Distribution ViewerCertificate

AWS::CloudFront::Distribution ViewerCertificate

A complex type that specifies the following:

  • Whether you want viewers to use HTTP or HTTPS to request your objects.

  • If you want viewers to use HTTPS, whether you're using an alternate domain name, such as example.com, or the CloudFront domain name for your distribution, such as d111111abcdef8.cloudfront.net.

  • If you're using an alternate domain name, whether AWS Certificate Manager (ACM) provided the certificate, or you purchased a certificate from a third-party certificate authority and imported it into ACM or uploaded it to the IAM certificate store.

Specify only one of the following values:

For more information, see Using Alternate Domain Names and HTTPS in the Amazon CloudFront Developer Guide.

Syntax

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

JSON

{
  "AcmCertificateArn" : String,
  "CloudFrontDefaultCertificate" : Boolean,
  "IamCertificateId" : String,
  "MinimumProtocolVersion" : String,
  "SslSupportMethod" : String
}

Properties

AcmCertificateArn

If you want viewers to use HTTPS to request your objects and you're using an alternate domain name, you must choose the type of certificate that you want to use. If ACM provided your certificate, specify the Amazon Resource Name (ARN) for the ACM certificate that you want to use for this distribution. CloudFront only supports ACM certificates in the US East (N. Virginia) Region (us-east-1).

If you specify an ACM certificate ARN, you must also specify an SSL support method (sni-only or vip).

Required: No

Type: String

Update requires: No interruption

CloudFrontDefaultCertificate

If you're using the CloudFront domain name for your distribution, such as d111111abcdef8.cloudfront.net, specify this value as true.

Required: Conditional

Type: Boolean

Update requires: No interruption

IamCertificateId

If you want viewers to use HTTPS to request your objects and you're using an alternate domain name, you must choose the type of certificate that you want to use. If you purchased your certificate from a third-party certificate authority and uploaded it to the IAM certificate store, specify the certificate ID that you want to use for this distribution.

If you specify a certificate ID, you must also specify an SSL support method (sni-only or vip).

Required: No

Type: String

Update requires: No interruption

MinimumProtocolVersion

Specify the security policy that you want CloudFront to use for HTTPS connections. A security policy determines two settings:

  • The minimum SSL/TLS protocol that CloudFront uses to communicate with viewers.

  • The cipher that CloudFront uses to encrypt the content that it returns to viewers.

Note

On the CloudFront console, this setting is called Security Policy.

We recommend that you specify TLSv1.1_2016 unless your viewers are using browsers or devices that do not support TLSv1.1 or later.

When both of the following are true, you must specify TLSv1 or later for the security policy:

  • You're using a custom certificate; that is, you specified a value for ACMCertificateArn or for IAMCertificateId.

  • You're using SNI; that is, you specified sni-only for SSLSupportMethod.

If you specify true for CloudFrontDefaultCertificate, CloudFront automatically sets the security policy to TLSv1 regardless of the value that you specify here.

For information about the relationship between the security policy that you choose and the protocols and ciphers that CloudFront uses to communicate with viewers, see Supported SSL/TLS Protocols and Ciphers for Communication Between Viewers and CloudFront in the Amazon CloudFront Developer Guide.

Required: Conditional

Type: String

Allowed Values: SSLv3 | TLSv1 | TLSv1.1_2016 | TLSv1.2_2018 | TLSv1_2016

Update requires: No interruption

SslSupportMethod

If you specify a value for ACMCertificateArn or for IAMCertificateId, you must also specify how you want CloudFront to serve HTTPS requests: using a method that works for browsers and clients released after 2010, or one that works for all clients.

  • sni-only: CloudFront can respond to HTTPS requests from viewers that support Server Name Indication (SNI). All modern browsers support SNI, but there are a few that don't. For a current list of the browsers that support SNI, see the Wikipedia entry Server Name Indication. To learn about options to explore if you have viewers with browsers that don't include SNI support, see Choosing How CloudFront Serves HTTPS Requests in the Amazon CloudFront Developer Guide.

  • vip: CloudFront uses dedicated IP addresses for your content and can respond to HTTPS requests from any viewer. However, there are additional monthly charges. For details, including specific pricing information, see Custom SSL options for Amazon CloudFront on the AWS marketing site.

Don't specify a value here if you specified CloudFrontDefaultCertificate as true.

For more information, see Choosing How CloudFront Serves HTTPS Requests in the Amazon CloudFront Developer Guide.

Required: Conditional

Type: String

Allowed Values: sni-only | vip

Update requires: No interruption

See Also

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