Starting in Untangle NGFW v.11.2, our Reports module can generate data on admin logins as well as any changes that have been made to the Untangle server.
Use the Reports Viewer - this is the "Reports" button that appears at the top of your server's GUI once you've installed the Reports module. Clicking on the button will bring up the Reports Viewer, with various sections and applications to navigate through on the left. For this particular report/event, click the "Administration" option on the left:
From there, Under the Administration category and you will see both Reports and Events for Admin Logins and Settings Changes:
The reports/events will look similar to these:
By default this report will show you the last 24 hours of activity but, if needed, you can adjust the date range on this report. If you click the "Since" drop-down it will present you with a list of pre-formatted time ranges and the option to set a custom time range.
Selecting Time Range.... from the menu will display aclickable calendar. You can select a start time & date and end time & date. Click the Apply button, the report will automatically refresh:
Keep in mind, how far back you can go will be dependent on the data retention settings in the Reports app. That setting is found under the settings of the Reports service and found on the 'Data' tab. The entry will show as 'Data Retention days'.