Re: Google and IPv6 inverse?

[Leo Bicknell <bicknell () ufp org>]

In a message written on Mon, Jun 06, 2011 at 08:45:31AM -0400, Christopher Morrow wrote:
> On Mon, Jun 6, 2011 at 1:19 AM, Hank Nussbacher <hank () efes iucc ac il> wrote:
> > Will Google have inverse working by June 8th?
>
> poking the tiger some... 'why?'

It's the network equivilent of holding open the door for someone
or saying please and thank you.  Civilized network operators do it
to be polite.

Picking on the name in Hank's e-mail:

% traceroute -n efes.iucc.ac.il
traceroute to efes.iucc.ac.il (128.139.202.17), 64 hops max, 52 byte packets
 1  149.20.48.1  1.515 ms  0.783 ms  0.706 ms
 2  149.20.65.9  2.756 ms  0.972 ms  3.156 ms
 3  64.215.195.21  50.607 ms  50.524 ms  54.705 ms
 4  207.138.144.46  166.234 ms  166.235 ms  166.240 ms
 5  62.40.125.122  230.584 ms  230.520 ms  237.217 ms
 6  128.139.188.1  230.609 ms  443.760 ms  230.629 ms
 7  * * *

Quick question, which network providers were involved in that trace?
Have fun hitting up whois to find out!

% traceroute efes.iucc.ac.il
traceroute to efes.iucc.ac.il (128.139.202.17), 64 hops max, 52 byte packets
 1  exit.blue.sql1.isc.org (149.20.48.1)  2.410 ms  2.275 ms  0.782 ms
 2  int-0-4-0-0.r1.pao1.isc.org (149.20.65.9)  3.493 ms  2.452 ms  0.958 ms
 3  ge-9-15-1G.ar1.PAO2.gblx.net (64.215.195.21)  50.488 ms  50.540 ms 54.440 ms
 4  DANTE.TenGigabitEthernet7-3.ar1.FRA4.gblx.net (207.138.144.46) 166.227 ms  166.231 ms  166.217 ms
 5  iucc-lb1-gw.rt1.fra.de.geant2.net (62.40.125.122)  234.928 ms 245.142 ms  244.414 ms
 6  gp1-gp0-te.ilan.net.il (128.139.188.1)  230.536 ms  230.618 ms 230.655 ms
 7  *^C

Ah, ISC->Global Crossing->GEANT2.

See, rDNS just saved me about 2 minutes of whois pain.  Which is
what being polite is all about, making a very minor effort on your
part to save someone else a minor amount of pain.

Or, if you want another view on it:

http://www.nanog.org/meetings/nanog47/presentations/Sunday/RAS_Traceroute_N47_Sun.pdf

Start at slide 12.

-- 
       Leo Bicknell - bicknell () ufp org - CCIE 3440
        PGP keys at http://www.ufp.org/~bicknell/

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