How Zone Files Are Read

Tim Daneliuk tundra at
Wed Dec 16 18:52:26 UTC 2020

On 12/16/20 12:25 PM, Timothe Litt wrote:
> On 16-Dec-20 11:37, Tim Daneliuk wrote:
>> I ran into a situation yesterday which got me pondering something about bind.
>> In this case, a single line in a zone file was bad.  The devops automation
>> had inserted a space in the hostname field of a PTR record.
>> What was interesting was that - at startup - bind absolutely refused
>> to load the zone file at all.  I would have expected it to complain
>> about the bad record and ignore it, but load the rest of the
>> good records.
>> Can someone please explain the rationale or logic for this?  Not complaining,
>> just trying to understand for future reference.
>> TIA,
>> Tim
> DNS is complicated.  The scope of an error in a zonefile is hard to determine.
> To avoid this, your automation should use named-checkzone before releasing a zone file.
> This will perform all the checks that named will when it is loaded.

Kind of what I thought.  Whoever build the environment in question
really didn't understand DNS very well and hacked together a kludge
that I am still trying to get my head around.

Tim Daneliuk     tundra at
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