The web system assigns each user a timeout period to prevent idle users from occupying system resources.
If you do not perform any operations on the web system GUI for a long time, you are logged out and the login page is displayed. If you need to continue operations, log in again.
By default, the timeout period for a login user is 20 minutes. You can change the timeout period on the System Info page.
Choose and enter the new timeout period on the System info page. Click Apply.