Hello Tony,
Please excuse me, as I am a bit confused ...
I have tried to verify your findings, but I've found something awkward:
root@domac:~# host -t any 186.198.193.in-addr.arpa dns1.carnet.hr
Using domain server:
Name: dns1.carnet.hr
Address: 161.53.123.2#53
Aliases:
186.198.193.in-addr.arpa has SOA record dns1.CARNet.hr.
hostmaster.CARNet.hr. 2021121001 10800 3600 2419200 14400
186.198.193.in-addr.arpa name server dns2.CARNet.hr.
186.198.193.in-addr.arpa name server dns1.CARNet.hr.
root@domac:~# host -t any 186.198.193.in-addr.arpa dns2.carnet.hr
Using domain server:
Name: dns2.carnet.hr
Address: 161.53.160.2#53
Aliases:
186.198.193.in-addr.arpa has SOA record dns1.CARNet.hr.
hostmaster.CARNet.hr. 2021121001 10800 3600 2419200 14400
186.198.193.in-addr.arpa name server dns2.CARNet.hr.
186.198.193.in-addr.arpa name server dns1.CARNet.hr.
root@domac:~#
Does this mean that the delegation of the
192/27.186.198.193.in-addr.arpa is in the zone 186.198.193.in-addr.arpa?
Moment ago it was all so clear to me, but now it seems hieroglyphic
again :-(
Any idea? Thank you ...
Kind regards,
Mirsad
On 12/29/2021 6:57 PM, Tony Finch wrote:
Mirsad Goran Todorovac <mirsad.todoro...@alu.unizg.hr> wrote:
I have recently implemented dynamic updates to a sub /24 reverse DNS
domain, 193.198.186.192/27.
I had upstream domain 192/27.186.198.193.in-addr.arpa. delegated from
authoritative servers.
However, something still isn't right. In some reverse PTR addresses, the
resolver sees first redirection, and the second redirection, but somehow
fails to connect them in a reverse lookup:
It looks to me like someone forgot to update the serial number on the zone
198.193.in-addr.arpa so your new delegation failed to propagate as it
should have,
The servers for 198.193.in-addr.arpa are:
dns1.carnet.hr
dns2.carnet.hr
ns.ripe.net
The first two know about the delegation for your zone
192/27.186.198.193.in-addr.arpa but ns.ripe.net does not.
This is the cause of the inconsistencies that you observed.
The SOA serial number for 198.193.in-addr.arpa is the same
2021052502 on all its nameservers.
Tony.
Mirsad Goran Todorovac
CARNet sistem inženjer
Grafički fakultet | Akademija likovnih umjetnosti
Sveučilište u Zagrebu
--
CARNet system engineer
Faculty of Graphic Arts | Academy of Fine Arts
University of Zagreb, Republic of Croatia
tel. +385 (0)1 3711 451
mob. +385 91 57 88 355
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