Piero wrote:
Hi there,
I have a strange issue with DNSMasq: it looks like it saves dns
cached query and keep them after a restart.
Here is the problem: the host opaplnx13 didn't reverse lookup and I
saw this in DNSMasq logs. I fixed the problem in "master DNS servers"
and they actually reverse lookup opaplnx13 correctly but DNSMasq
actually does not. It doesn't even after a restart.
10.145.3.71 and 10.145.3.72 are DNSMasq servers
10.145.1.121 is a master server
[root@opaplnx23 etc]# nslookup
server 10.145.3.71
Default server: 10.145.3.71
Address: 10.145.3.71#53
10.145.3.41
Server: 10.145.3.71
Address: 10.145.3.71#53
** server can't find 41.3.145.10.in-addr.arpa: NXDOMAIN
server 10.145.3.72
Default server: 10.145.3.72
Address: 10.145.3.72#53
10.145.3.41
Server: 10.145.3.72
Address: 10.145.3.72#53
** server can't find 41.3.145.10.in-addr.arpa: NXDOMAIN
server 10.145.1.121
Default server: 10.145.1.121
Address: 10.145.1.121#53
10.145.3.41
Server: 10.145.1.121
Address: 10.145.1.121#53
41.3.145.10.in-addr.arpa name = opaplnx13.intra.azosp.vr.it.
In DNSMasq log I can see:
Aug 25 16:21:06 dnsmasq[6373]: query[PTR] 41.3.145.10.in-addr.arpa
from 10.145.3.69
Aug 25 16:21:06 dnsmasq[6373]: config 10.145.3.41 is NXDOMAIN-IPv4
^^^^^^^
It's not cached, there's something in your dnsmasq configuration that's
causing it to answer in that way,
How is it possible? Is there a cache file somewhere?
No cache file, something in /etc/dnsmasq.conf
Cheers,
Simon.
