Tuning your routers clock
In this article I will give you three useful commands for setting up your router’s clock.
If you are wondering why the router’s clock is important, just think the syslog messages. Every syslog message has the time that the event occurred. Imagine a hacking attempt that has been tracked by your syslog, if the clock of your router is not configured properly, you can’t find out when the attack took place.
Now let’s start with the commands.
Clock set
Clock set hh:mm:ss day month year
This command manually sets the router’s clock. The time is specified in terms of a 24 hour clock and the year must be in a four digit notation for example 2000.
Clock timezone
Clock timezone zone hours [minutes]
This command sets the routers time zone and the number of hours from the UTC.
Clock summer time
Clock summer-time zone recurring [sweek sday smonth shh:mm eday emonth ehh:mm]
This command informs the router for the daylight savings time. The recurring form of the command specifies that daylight savings time should be observed at the given time every year. The syntax format of the command specifies a start date and an end date for daylight savings time.
Don’t underestimate your router’s clock settings. It is a powerful tool to know when, and sometimes given the time, who attempted to bypass your security. It is a crucial setting that can be used as an evidence or as a tool to avoid problems in the future.
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