On Wed, Aug 19, 2020 at 7:42 AM Matus UHLAR - fantomas
<uh...@fantomas.sk> wrote:
again, why you query for 250.0-24.199.212.125.in-addr.arpa
under normal circumstances there's no point of querying that name.
On 19.08.20 10:05, tale via bind-users wrote:
Well yes and no. While an individual user would typically not,
resolvers sure will. While trying to resolve
250.199.212.125.in-addr.arpa, it will eventually get to
250.199.212.125.in-addr.arpa CNAME 250.0-24.199.212.125.in-addr.arpa.
my question is why would anyone do this, as this apparently does not make
sense.
someone (vietel) illogically delegated whole /24 subnet to broken servers:
199.212.125.in-addr.arpa. 86400 IN NS dns2.vietel.com.vn.
199.212.125.in-addr.arpa. 86400 IN NS dns1.vietel.com.vn.
0.199.212.125.in-addr.arpa has address 125.235.4.59
1.199.212.125.in-addr.arpa is an alias for 1.0-24.199.212.125.in-addr.arpa.
...
255.199.212.125.in-addr.arpa is an alias for 255.0-24.199.212.125.in-addr.arpa.
Then it will need to resolve the canonical name, and a response like
the original one that was shown will be clearly buggy.
I say "possibly" because from my vantage, all three of
ns{,1,2}.viettelidc.com.vn, the authorities for
0-24.199.212.125.in-addr.arpa, are giving fine answers right now (on
udp; blocked on tcp). This includes the originally reported problem
IP, 115.84.177.8
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Fucking windows! Bring Bill Gates! (Southpark the movie)
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