A vRealize Automation IaaS Windows server communicates with and collects data from an Amazon EC2 account.
When you use Amazon Web Services (AWS) for provisioning, the IaaS Windows servers that host the DEM workers must meet the following requirements.
DEM worker hosts must have Internet access.
If the DEM worker hosts are behind a firewall, HTTPS traffic must be allowed to and from aws.amazon.com as well as the URLs for EC2 regions that your AWS accounts have access to, such as ec2.us-east-1.amazonaws.com for the US East region.
Each URL resolves to a range of IP addresses, so you might need to use a tool, such as the one available from the Network Solutions Web site, to list and configure these IP addresses.
If the DEM worker hosts reach the Internet through a proxy server, the DEM service must be running under credentials that can authenticate to the proxy server.