ViewerCertificate

A complex type that determines the distribution's SSL/TLS configuration for communicating with viewers.

If the distribution doesn't use Aliases (also known as alternate domain names or CNAMEs)—that is, if the distribution uses the CloudFront domain name such as d111111abcdef8.cloudfront.net—set CloudFrontDefaultCertificate to true and leave all other fields empty.

If the distribution uses Aliases (alternate domain names or CNAMEs), use the fields in this type to specify the following settings:

• Which viewers the distribution accepts HTTPS connections from: only viewers that support server name indication (SNI) (recommended), or all viewers including those that don't support SNI.

• To accept HTTPS connections from only viewers that support SNI, set SSLSupportMethod to sni-only. This is recommended. Most browsers and clients support SNI.

• To accept HTTPS connections from all viewers, including those that don't support SNI, set SSLSupportMethod to vip. This is not recommended, and results in additional monthly charges from CloudFront.

• The minimum SSL/TLS protocol version that the distribution can use to communicate with viewers. To specify a minimum version, choose a value for MinimumProtocolVersion. For more information, see Security Policy in the Amazon CloudFront Developer Guide.

• The location of the SSL/TLS certificate, Certificate Manager (ACM) (recommended) or Identity and Access Management (IAM). You specify the location by setting a value in one of the following fields (not both):

• ACMCertificateArn

• IAMCertificateId

All distributions support HTTPS connections from viewers. To require viewers to use HTTPS only, or to redirect them from HTTP to HTTPS, use ViewerProtocolPolicy in the CacheBehavior or DefaultCacheBehavior. To specify how CloudFront should use SSL/TLS to communicate with your custom origin, use CustomOriginConfig.

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