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[GNUnet-developers] DNS traceroute study [OT]
From: |
Chris GauthierDickey |
Subject: |
[GNUnet-developers] DNS traceroute study [OT] |
Date: |
Wed, 9 Jul 2008 19:53:38 -0600 |
Dear all,
[This is OT, having nothing to do with GNUnet.]
I would like your help for a study on Internet topologies and its relation to
DNS reliability. The goal is to do a traceroute from each site to all 40900
DNS start-of-authority (SOA) servers worldwide. For this work, we are
trying to run traceroutes from as many different Internet sites as possible.
Hence I would really appreciate it if you would be able to run a simple piece
of code (described below) on one of your Linux/UNIX systems and send me the
output. Running it on your home ISP as well as at work would also be
valuable (however; running it on two different systems at the same
organization would not be useful).
I have compiled a set of shell scripts that will run traceroute and collect
the data in a format suitable for our analysis. The scripts only need
permission to run traceroute (often available for normal users on most
systems) and "awk". The script will run for about a week (!) using only a
few minutes of CPU time in total (running traceroute in parallel, even with
only a tiny amount of parallelism on some test networks caused ISPs to drop
packets changing the results). The script produces a data.tar.gz-file with
the results (4 MB after compression, less than 20 before).
While some (clueless) administrators sometimes "mind" being traceroutes, the
scripts should in no way pose a security risk for anyone and I am not aware
of any competent administrator that would mind this particular experiment. The
amount of CPU and bandwidth used is also miniscule (it could easily be
supported by an 80386 with an old phone modem at, say, 33 kbps).
The 335 kb shell script archive can be found at
http://grothoff.org/christian/traceroute-sh.tar.gz
(extract with 'tar xvfz traceroute-sh.tar.gz', then run
"./master.sh").
If you have any questions, please don't hesitate to contact me.
Thanks a lot in advance!
Christian
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