Go to Configuration→Attendance section→ Methods→Web browser→Configure→select terminal→Edit:
Select "IP Restriction" and "Record IP address when clocking in/out" (visible in the Activity report).
Enter a public IP address from a location where employees can start and stop working through a web browser.
By clicking the "ENTER" button, you can add more IP addresses that will be eligible to clock in and out.
Remember that IP restriction can be done only to the public IP address. The IP restriction applies only to the "Web browser" method (terminal).