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Re: Schneier: ISPs should bear security burden

  • From: Nicholas Suan
  • Date: Sat Apr 30 05:59:48 2005

Suresh Ramasubramanian wrote:
On 4/30/05, Steven Champeon <[email protected]> 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.


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.


I was actually bored enough to figure that out one day:

[[email protected] G]$ dig +short -x 203.160.1.66 -x 203.160.1.67 -x 203.160.1.68 -x 203.160.1.69
localhost.
localhost.
localhost.
localhost.
[[email protected] G]$ whois 203.160.1.66
% [whois.apnic.net node-2]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

inetnum: 203.160.0.0 - 203.160.1.255
netname: VNPT-VNNIC-VN
country: VN
descr: Vietnam Posts and Telecommunications (VNPT)
descr: 23 Phan Chu Trinh st., Hanoi capital, Vietnam
admin-c: NXC1-AP
tech-c: KNH1-AP
status: ALLOCATED PORTABLE
changed: [email protected] 20041011
mnt-by: MAINT-VN-VNNIC
mnt-lower: MAINT-VN-VNPT
source: APNIC