System registration fails when using Connect to Red Hat
Currently, when we attempt to register a system using Connect to Red Hat, the registration process fails with the error message "Name or service
not known". This occurs because the empty Custom Server URL and Custom Base URL values overwrite the default values for system registration.
To work around this problem, expand the Options menu and perform the following steps before you click Register :
Select Custom Server URL check box and enter subscription.rhsm.redhat.com as its value in the text box below.
Select Custom Base URL check box and enter https://cdn.redhat.com as its value in the text box below.
As a result, the system registration is successful. The documentation is currently in the process of getting updated with this information.
The bug will be fixed in the GA version. Thanks to Martin Kolman, Michael Young, Samantha Bueno, and Shweta Naresh for their work ! :)