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-------- Original Message --------
Subject: Iptables, timestart and timestop arguments and daylight saving
time in UK
Date: Tue, 29 Mar 2011 14:47:07 +0100
From: Sebastian Arcus <shop@xxxxxxxxxxxx>
To: netfilter@xxxxxxxxxxxxxxx
Hi all,
The clock changed over the weekend in the UK by one hour (daylight
saving time). I have a setup where I block some MAC addresses access to
the Internet based on time, using iptables, "timestart" and "timestop"
arguments. The command is the following:
iptables -A FORWARD -p ALL -o eth0 -m mac --mac-source $BLOCKED_MAC1 \
-m time --timestart 13:00 --timestop 12:00 -j DROP
After the weekend, the server kept on blocking as per the old winter
time. I checked the server time with the "date" command and the time on
the client machine (Windows XP) - and in both places the clock is
updated as per new time / summer time. The iptables on server kept on
blocking according to winter time for two days. Even restarting the
iptables script (which flushes the tables) didn't make a different.
Finally, when I restarted the whole server, it started blocking
according to new summer time. Here is the setup:
Client: Windows XP Home
Server: Slackware 13.0
Kernel: 2.6.29.6
Iptables: 1.4.3.2
Is this a known bug in the kernel, or am I doing something wrong?
Thanks for any contributions,
Sebastian
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