For hostname resolution, the Amazon Web Services (AWS) appliance requires you to configure a DNS server in the Virtual Private Cloud (VPC).
You must create a DHCP options set, associate it with the VPC, and then change the VPC properties. In a mixed on-premises and AWS deployment, any on-premises RSA Authentication Manager primary and replica instances need to use the DNS server that is configured in the VPC.
Select the VPC, and select Edit DHCP Options Set from the Actions list.
In the DHCP Options Set list, select a set of options.
Any existing AWS instances and all new AWS instances that you launch in that VPC will use the options.
You do not need to restart or relaunch the AWS instances. The instances automatically pick up the changes within a few hours, depending on how frequently the instance renews its DHCP lease. You can explicitly renew the lease in AWS. For instructions, see the AWS documentation.