Comments on: Install and Configure Caching-Only DNS Server in RHEL/CentOS 7 – Part 10

By: Ralph Siegler

Ralph Siegler — Mon, 28 Jan 2019 21:16:15 +0000

Never mind dnssec, DNS uses both tcp and udp! longer query responses will use tcp, you’ll find your udp-only solution works great most of the time then sporadically fails for queries returning long lists. Classic mistake you’ve committed there

By: Raghu

Raghu — Tue, 04 Dec 2018 22:08:43 +0000

Hi,

After configuring DNS cache server as follows above, when I test from windows nslookup it shows as (default server : Unknown).
rest of things are working fine.

why it is ?

By: Player

Player — Tue, 26 Dec 2017 09:54:31 +0000

Hello,

I have a little problems in bind9.

IN DNS service running status, First Query Time: 827 msec and Second Query Time: 1 0r 0 msec .

After restart service or reboot the bind server, First Query Time: 827 and Second Query Time: 0 or msec.

I want to know is previous cache is missing or not useless. and then may i know the best caching parameter

By: x

Tue, 19 Dec 2017 17:35:04 +0000

Isn’t it a open resolver now? any? means any? including localhost and all the others….

By: Trung Ma

Trung Ma — Wed, 16 Aug 2017 03:33:22 +0000

Hello Gabriel,

Great articles. How long DNS cached will be updated the new record.