The first time you run the installer, you create a domain. If you are installing on multiple machines and you have created a domain, you join the domain.

When you create a domain, the node on the machine where you install becomes a gateway node in the domain. You can choose to set up secure communication between services within the domain. You can also choose to create some application services during the installation process.

When you join a domain, you can configure the node that you create to be a gateway node. When you create a gateway node, you can select enable a secure HTTPS connection to Informatica Administrator.