Hi.
Am Donnerstag, den 09.08.2018, 00:20 +0100 schrieb Danny Horne via
users:
On 08/08/18 23:27, Dirk Gottschalk via users wrote:
> You have to find out whi issues the query. I would disable
> recursion at
> all except for the internal network.
>
> Find out who queries this domains and answer witth NXDOMAIN,
> disabling
> recursion would do thos. Blocking DNS queries if you are
> authotitative
> for internet domains is generally a very bad idea.
>
> Regards,
> Dirk
>
>
Ok, been doing some more digging (pardon the pun), and after turning
on
query logging I've found out that it's my own DNS server making the
query, and Barracuda's DNS is causing the 'connection refused' error.
Correct, all of the DNS-Servers of
barracudacentral.org refuse
connection attempts. I tried digging it with dig. ;-)
Need to find out now why my DNS is querying Barracuda's DNS. I
run
Postfix on this server with a bunch of add-ons, so it's possible one
of those might be the cause.
That is possible. Check the postqueue and the plug-ins. Perhaps postfix
tries to deliver mail to this host for any reason.
Regards,
Dirk
--
Dirk Gottschalk
Paulusstrasse 6-8
52064 Aachen, Germany
GPG: DDCB AF8E 0132 AA54 20AB B864 4081 0B18 1ED8 E838
Keybase.io:
https://keybase.io/dgottschalk
GitHub:
https://github.com/Dirk1980ac