DNS Support in VPC

• enableDnsHostnames - Indicates whether instances with public IP addresses get corresponding public DNS hostnames.

• enableDnsSupport - Indicates whether the DNS resolution is supported.

• If both attributes are set to true, the following occurs:

  • Instances with a public IP address receive corresponding public DNS hostnames.

• If either or both of the attributes is set to false, the following occurs:

  • Instances with a public IP address do not receive corresponding public DNS hostnames.

• By default, both attributes are set to true in a default VPC or a VPC created by the VPC wizard.

• By default, only the enableDnsSupport attribute is set to true in a VPC created any other way.