extensions/libxt_time.man

This matches if the packet arrival time/date is within a given range. All
options are optional, but are ANDed when specified.
.TP
\fB\-\-datestart\fP \fIYYYY\fP[\fB\-\fP\fIMM\fP[\fB\-\fP\fIDD\fP[\fBT\fP\fIhh\fP[\fB:\fP\fImm\fP[\fB:\fP\fIss\fP]]]]]
.TP
\fB\-\-datestop\fP \fIYYYY\fP[\fB\-\fP\fIMM\fP[\fB\-\fP\fIDD\fP[\fBT\fP\fIhh\fP[\fB:\fP\fImm\fP[\fB:\fP\fIss\fP]]]]]
.IP
Only match during the given time, which must be in ISO 8601 "T" notation.
The possible time range is 1970-01-01T00:00:00 to 2038-01-19T04:17:07.
.IP
If \-\-datestart or \-\-datestop are not specified, it will default to 1970-01-01
and 2038-01-19, respectively.
.TP
\fB\-\-timestart\fP \fIhh\fP\fB:\fP\fImm\fP[\fB:\fP\fIss\fP]
.TP
\fB\-\-timestop\fP \fIhh\fP\fB:\fP\fImm\fP[\fB:\fP\fIss\fP]
.IP
Only match during the given daytime. The possible time range is 00:00:00 to
23:59:59. Leading zeroes are allowed (e.g. "06:03") and correctly interpreted
as base-10.
.TP
[\fB!\fR] \fB\-\-monthdays\fP \fIday\fP[\fB,\fP\fIday\fP...]
.IP
Only match on the given days of the month. Possible values are \fB1\fR
to \fB31\fR. Note that specifying \fB31\fR will of course not match
on months which do not have a 31st day; the same goes for 28- or 29-day
February.
.TP
[\fB!\fR] \fB\-\-weekdays\fP \fIday\fP[\fB,\fP\fIday\fP...]
.IP
Only match on the given weekdays. Possible values are \fBMon\fR, \fBTue\fR,
\fBWed\fR, \fBThu\fR, \fBFri\fR, \fBSat\fR, \fBSun\fR, or values from \fB1\fR
to \fB7\fR, respectively. You may also use two-character variants (\fBMo\fP,
\fBTu\fR, etc.).
.TP
\fB\-\-utc\fP
.IP
Interpret the times given for \fB\-\-datestart\fP, \fB\-\-datestop\fP,
\fB\-\-timestart\fP and \fB\-\-timestop\fP to be UTC.
.TP
\fB\-\-localtz\fP
.IP
Interpret the times given for \fB\-\-datestart\fP, \fB\-\-datestop\fP,
\fB\-\-timestart\fP and \fB\-\-timestop\fP to be local kernel time. (Default)
.PP
EXAMPLES. To match on weekends, use:
.IP
\-m time \-\-weekdays Sa,Su
.PP
Or, to match (once) on a national holiday block:
.IP
\-m time \-\-datestart 2007\-12\-24 \-\-datestop 2007\-12\-27
.PP
Since the stop time is actually inclusive, you would need the following stop
time to not match the first second of the new day:
.IP
\-m time \-\-datestart 2007\-01\-01T17:00 \-\-datestop 2007\-01\-01T23:59:59
.PP
During lunch hour:
.IP
\-m time \-\-timestart 12:30 \-\-timestop 13:30
.PP
The fourth Friday in the month:
.IP
\-m time \-\-weekdays Fr \-\-monthdays 22,23,24,25,26,27,28
.PP
(Note that this exploits a certain mathematical property. It is not possible to
say "fourth Thursday OR fourth Friday" in one rule. It is possible with
multiple rules, though.)