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f8f32deda31d ("meta: Introduce new conditions 'time', 'day' and 'hour'")
reverses the hour range in case that a cross-day range is used, eg.
meta hour "03:00"-"14:00" counter accept
which results in (Sidney, Australia AEDT time):
meta hour != "14:00"-"03:00" counter accept
kernel handles time in UTC, therefore, cross-day range may not be
obvious according to local time.
The ruleset listing above is not very intuitive to the reader depending
on their timezone, therefore, complete netlink delinearize path to
reverse the cross-day meta range.
Update manpage to recommend to use a range expression when matching meta
hour range. Recommend range expression for meta time and meta day too.
Extend testcases/listing/meta_time to cover for this scenario.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1737
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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