Schneier: ISPs should bear security burden

Sat Apr 30 09:57:11 UTC 2005

Suresh Ramasubramanian wrote:
> On 4/30/05, Steven Champeon <schampeo at 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.
> 
> 
>>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:

[FT at fenrir 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.
[FT at fenrir 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:      hm-changed at vnnic.net.vn 20041011
mnt-by:       MAINT-VN-VNNIC
mnt-lower:    MAINT-VN-VNPT
source:       APNIC