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List:       netfilter
Subject:    Re: (Ab)using iptables to record byte count per IP?
From:       Artūras Šlajus <x11 () arturaz ! net>
Date:       2009-01-09 11:50:43
Message-ID: 49673A13.6050807 () arturaz ! net
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Richard Hartmann wrote:
 > Hi all,
 >
 > I need to log the traffic each local IP in a NAT'ed network generates
 > per day.
 >
 > Unfortunately, the environment is rather restricted and compiling new
 > software is not an option. Thus, I am wondering if I can abuse iptables,
 > which is in use anyway, to log for me, as well.
 >
 > The end result should be a log which contains IP, date and traffic
 > generated. I don't really care about the output format as I will perl it
 > into the format I need, anyway.

iptables -N ACCOUNTING
iptables -A FORWARD -j ACCOUNTING
iptables -A ACCOUNTING -s your_user_ip -j ACCEPT
iptables -A ACCOUNTING -d your_user_ip -j ACCEPT

bam, with iptables -L ACCOUNTING -n -v you can have packet/byte counters ;)
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