> On 20 Aug 2020, at 00:41, Matus UHLAR - fantomas <uh...@fantomas.sk> wrote: > >> 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.
Presumably because they don’t know that APNIC can delegate the /24s that make up the /17 independently of each other. > 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) > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > ISC funds the development of this software with paid support subscriptions. > Contact us at https://www.isc.org/contact/ for more information. > > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users