When the app is operating in Local mode, you have the option to include hostname validation in your client. When the terminal is activated, a certificate is generated on the terminal and a Subject Alternative Name (SAN) is added. On the terminal, the SAN can be viewed as the Domain Name System (DNS) name for the Acceptance Devices app server.
The SAN is generated in this format: {terminal serial number}.cybs.seclib.io.
To perform hostname validation or to connect to the terminal by using a SAN instead of an IP address, you can add the terminal IP address and SAN to your hosts file.