Different signed serial numbers

[Alessandro Vesely]

On Wed 24/Sep/2025 08:25:40 +0200 Nick Tait wrote:
> On 24/09/2025 05:42, Alessandro Vesely wrote:
>> On Tue 23/Sep/2025 01:55:51 +0200 Mark Andrews wrote:
>>> When checking zone serials for consistency all the above needs to be taken 
>>> into account.  The scripts work when you query the correct instance of the 
>>> zone when using views and when there is not an inline signer on the secondary.
>>
>> The script I ran just issues a few queries using Python's dns.resolver.  I 
>> don't see how it could check for consistency (or determine that some 
>> resolvers use different views).
>
> The tool you're using might be looking at NS records and then querying the 
> authoritative servers directly, possibly in addition to the asking the 
> configured resolver?


The script is https://github.com/hannob/alwaysdns.  It is charmingly simple in 
its downloading and comparing all SOA records.  I assume signed serials have 
definitely disqualified this synchronization checking technique.  Are there any 
alternatives?


> (What do the internal zone file NS records point to? And 
> when you "copy the (edited) internal zone file to the public one, replacing 
> things like NATted addresses", are you also updating those?)


This is an old bash script I've been tinkering with for years.  Internal and 
public zones live in two parallel directories.  For each internal zone file it 
generates the public copy on a temporary file using sed.  If that temporary is 
different from the current one, all .jbk, .signed, .signed.jnl of that zone are 
marked for deletion.  If there are any files so marked at the end, named is 
stopped, the files are removed, and named is restarted.  The script doesn't 
check the serial numbers.


Best
Ale
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