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Full Discussion: iptables latency evaluation
Special Forums Cybersecurity iptables latency evaluation Post 302568890 by Corona688 on Friday 28th of October 2011 02:05:18 PM
Old 10-28-2011
You might have to do it statistically. Take the same reading hundreds or thousands of times, determine confidence intervals, etc.

---------- Post updated at 12:05 PM ---------- Previous update was at 12:04 PM ----------

I think there is a LOG target for iptables which might mark time, but probably not accurately enough, and would add delay of its own.
 

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ARNO_FWFILTER(1)														  ARNO_FWFILTER(1)

NAME
arno-fwfilter - a filter script to make iptables firewall logs more readable for humans SYNOPSIS
arno-fwfilter [OPTIONS] DESCRIPTION
arno-fwfilter is a pipe filter script to make the firewall-log better readable. Some usage examples are: Static firewall log filtering: arno-fwfilter < logfile Realtime firewall logging on tty10: tail --follow <logfile> | arno-fwfilter >/dev/tty10 & OPTIONS
--help, -h Print the available options. --html-output, -o Use basic HTML to format the output --no-locations, -l Disable to (try to) obtain the IP's geographical location. By default, http://www.hostip.info/ is visited to get this information. --no-colors, -c Disable the use of colors in the output. --single-line, -s Put all information about an event in a single line SEE ALSO
iptables(8), arno-iptables-firewall(8) The http://rocky.eld.leidenuniv.nl/ web site. AUTHOR
arno-fwfilter was written by Arno van Amersfoort <arnova@rocky.eld.leidenuniv.nl>. This manual page was written by Michael Hanke <michael.hanke@gmail.com>, for the Debian project (but may be used by others). Michael Hanke September 2005 ARNO_FWFILTER(1)
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