Ok, this is what I gathered: Looking Glass locations: http://www.caida.org/analysis/routing/reversetrace/ http://www.traceroute.org Looking glass software: http://net.doit.wisc.edu/~plonka/FlowScan/ http://www.paranode.com/lg/ http://nitrous.digex.net/source/source.html ftp://ftp.enterzone.net/looking-glass/mrlg-3.0/ ftp://ftp.shrubbery.net/rancid/rancid-2.1b.tar.gz Charles Sprickman <spork@inch.com> also mentioned that some of the sites that offer LG service also have a link to the source they use, so, you can also try that, YMMV. again, thanks for the input, --Ariel -- Ariel Biener e-mail: ariel@post.tau.ac.il PGP(6.5.8) public key http://www.tau.ac.il/~ariel/pgp.html