Watchguard Firebox X15 User Manual page 61

About using NTP to set system time
To set the system time for Edge, you can specify a NTP server to set the time automatically. The Network Time
Protocol (NTP) synchronizes computer clock times across a network. The Firebox can use NTP to get the
correct time automatically from NTP servers on the Internet. Because the Firebox puts the time from its system
clock in each log message it generates, the time must be set correctly. You can change the NTP server that the
Firebox uses. You can also add more NTP servers or delete existing ones, or you can set the time manually.
User Guide
Configuration and Management Basics
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