On Wed, 2008-04-30 at 17:28 +0800, rae l wrote: > On Wed, Apr 30, 2008 at 5:06 PM, Roy Ong <[EMAIL PROTECTED]> wrote: > > > > http://sg.archive.ubuntu.com/ > > > After nslookup & whois query, sg.archive.ubuntu.com is verified > > > located in Sg, too. > > > > > here's something easier .. > > $ sudo mtr -c3 -r sg.archive.ubuntu.com > <snip> > > 202.148.160.130 0.0% 16.1 15.2 14.0 16.1 1.1 > > nus-gw.sox.net.sg 0.0% 14.2 16.5 13.7 21.6 4.5 > > ftp.cita.nus.edu.sg 0.0% 15.0 14.9 14.6 15.0 0.2 > The objective is to find out where is sg.archive.ubuntu.com located, > but how do you work out the location from mtr's output?
looking at the connections - we are going thru nus-gw.sgx.net.sg then to ftp.cita.nus.edu.sg and as such, one could potentially do an educated guess that is within the nus.edu.sg network. mtr gives me a visual route that quickly allows me to do an educated guess as to where the location is. supporting stuff if you want to dig further are here $ dig ftp.cita.nus.edu.sg <snip><snip><snip> ;; ANSWER SECTION: ftp.cita.nus.edu.sg. 7180 IN CNAME ftp.science.nus.edu.sg. ftp.science.nus.edu.sg. 7180 IN A 137.132.69.169 $ whois 137.132.69.169 % [whois.apnic.net node-1] % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html inetnum: 137.132.0.0 - 137.132.255.255 netname: NUSNET <snip><snip><snip> person: Computer Centre National Universityof Singapore address: 2 Engineering Drive 4, National University of Singapore117584 as such, for me - running "mtr -c3 -r sg.archive.ubuntu.com" provides me with a quick method of "learning" where the end point might be without having to deal with too many details. _______________________________________________ Slugnet mailing list [email protected] http://wiki.lugs.org.sg/LugsMailingListFaq http://www.lugs.org.sg/mailman/listinfo/slugnet
