I got a new ADSL2+ modem/router last week, a NetComm NB604N. I ran into some problems when trying to set the parental controls (to turn off internet access at various times of the day) because I found that the time on the modem was 1 hour ahead of what it should have been. After some experimenting with changing the timezones I believe that there is a bug in the firmware, for the “(GMT +10:00) Canberra, Melbourne, Sydney” timezone. Even though daylight savings is not currently in effect, the modem is incorrectly adding 1 hour to the time.
As a workaround I was able to set the timezone to “(GMT +10:00) Brisbane” timezone to get the right time.
No doubt I’ll have to change the timezone to something else when daylight savings does actually start in a few months.
UPDATE: NetComm have confirmed to me that they are aware of the problem and that it should be fixed in a future firmware update. (28-Jul-2013)