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I'd like to open all ports for specific user for specific length of time using IPtable. The current rule i have is:

$IPTABLES -A FORWARD -i $LAN_IF -o $OUTSIDE_IF -p tcp -s 192.168.10.34 -m state --state NEW -j ACCEPT
$IPTABLES -A FORWARD -i $LAN_IF -o $OUTSIDE_IF -p udp -s 192.168.10.34 -m state --state NEW -j ACCEPT

So, how can i specify length of time? eg. 7:00 am to 5:30 pm

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2 Answers 2

up vote 2 down vote accepted

With the --timestart and --timestop statements (in 24h time format):

$IPTABLES -A FORWARD -i $LAN_IF -o $OUTSIDE_IF -p tcp -s 192.168.10.34 -m state --state NEW -j ACCEPT --timestart 7:00 --timestop 17:30

See man iptables

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From the iptables() manpage one can learn that a time module exists which does what you want:


time
This matches if the packet arrival time/date is within a given range. All options are optional, but are ANDed when specified. All times are interpreted as UTC by default.

--datestart [YYY[-MM[-DD[Thh[:mm[:ss]]]]] --datestop YYYY[-MM[-DD[Thh[:mm[:ss]]]]] 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. If --datestart or --datestop are not specified, it will default to 1970-01-01 and 2038-01-19, respectively. --timestart hh:mm[:ss] --timestop hh:mm[:ss] 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. [!] --monthdays day[,day...] Only match on the given days of the month. Possible values are 1 to 31. Note that specifying 31 will of course not match on months which do not have a 31st day; the same goes for 28- or 29-day February. [!] --weekdays day[,day...] Only match on the given weekdays. Possible values are Mon, Tue, Wed, Thu, Fri, Sat, Sun, or values from 1 to 7, respectively. You may also use two-character variants (Mo, Tu, etc.). --kerneltz Use the kernel timezone instead of UTC to determine whether a packet meets the time regulations. EXAMPLES. To match on weekends, use: -m time --weekdays Sa,Su Or, to match (once) on a national holiday block: -m time --datestart 2007-12-24 --datestop 2007-12-27 Since the stop time is actually inclusive, you would need the following stop time to not match the first second of the new day: -m time --datestart 2007-01-01T17:00 --datestop 2007-01-01T23:59:59 During lunch hour: -m time --timestart 12:30 --timestop 13:30 The fourth Friday in the month: -m time --weekdays Fr --monthdays 22,23,24,25,26,27,28
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