Re: Schneier: ISPs should bear security burden

[Steven Champeon <schampeo () hesketh com>]

on Sat, Apr 30, 2005 at 07:41:34AM +0530, Suresh Ramasubramanian wrote:
> On 4/30/05, Steven Champeon <schampeo () hesketh com> wrote:
>
> > ANantes-106-1-5-107.w193-251.abo.wanadoo.fr
> >
> > You'll see 'abo' for 'cable', perhaps? as well as 'cable'. But for most
>
> abo = short for "abonnement", that is, "subscription" / "subscriber"
> Just means its a pool of IPs assigned to users, I guess.

Yes, Romain Komorn was kind enough to tell me this offlist. Thanks.
 
> > Dunno. Don't have many examples of those, as I block most traffic from
> > there, and what I didn't block didn't often have rDNS anyway. The one
> > net.cn example I have, nova, named all of their rDNS with
> > user.nova.net.cn - yep, that's it - what every host is named.
>
> And there's a vietnamese ISP that was clever enough to give the same
> rDNS - "localhost" - to all their IP space.  Don't know which one of
> the three ISPs there does this, but as APNIC 20 is in Hanoi, I'll most
> likely find that out for myself.

Yep - got a rule to block stuff from them and everyone else who does
something that stupid, too.
 
> > FPT Viet Nam uses 'adsl-pool-xxx', 'adsl-fix-xxx', and 'dialup-xxx' (yes,
> > the x's are part of the actual name, not a placeholder for the numbers).
>
> So its not FPT Vietnam, but one of the two other ISPs there

They may use it, too. I dunno. It's not reliable to assume that any one
given network always has the same rDNS naming conventions.
 
> > 'bredband'. The Japanese use 'flets' and 'ftth', the Dutch and others
>
> ftth = fiber to the home.  flets is also some kind of fiber.

infoweb.ne.jp uses ftth, as does solcon.nl, onsnet.nu, and a few US ISPs,
such as brightohio.net, cvalley.net, and surewest.net. nmt.ne.jp uses flets,
as does across.or.jp, netwave.or.jp, dsn.jp, alpha-net.ne.jp (which also
apparently uses "bflets", and incl.ne.jp. Google suggests others do, too,
but they haven't come across my radar yet, or don't use it in rDNS naming.

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