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
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