Parental Controls ignoring System Time after Daylight Saving changes

[slinkoff]

As per the title, daylight saving in the UK and the clocks went back an hour. System time on my RT-AC86U shows the correct time on the AiProtection - Time Scheduling page but the blocking is out by an hour.

e.g., it's currently 12:30pm, System Time show the correct time on the router.
Parental Control set to block between 12-13 doesn't work.
If I set it to block between 13-14 then it blocks.
So it's an hour out.

This has only been a problem since the clock went back an hour in the UK.

 

[JDB]

Tried rebooting? Maybe the parental controls only initialise their timings at boot.


Sent from my iPhone using Tapatalk

 

[slinkoff]

stand down, router reboot fixed it

 

[ColinTaylor]

This behaviour has been noted before. It's a limitation of the --kerneltz option that the router uses. See:

http://ipset.netfilter.org/iptables-extensions.man.html

The caveat with the kernel timezone is that Linux distributions may ignore to set the kernel timezone, and instead only set the system time. Even if a particular distribution does set the timezone at boot, it is usually does not keep the kernel timezone offset - which is what changes on DST - up to date. ntpd will not touch the kernel timezone, so running it will not resolve the issue. As such, one may encounter a timezone that is always +0000, or one that is wrong half of the time of the year. As such, using --kerneltz is highly discouraged.