Connect from a computer to the URL of the GN4 application, e.g:
http://myserver/GN4/
The sign-in form shows up:
Sign in with your GN4 sign-in information (user name and password).
You may also want to store your sign-in information (user name and password) by clicking onto Remember me.
Important
If you cannot go beyond log on form, it may be that cookies are not enabled on your device. Enable cookies, and then retry.