[dns-operations] Diffing tools for zones?

Ray Bellis Ray.Bellis at nominet.org.uk
Mon Aug 2 20:19:02 UTC 2010

On 2 Aug 2010, at 20:09, Paul Hoffman wrote:

> Greetings. I used to be able to do a reasonably sane check for changed between two versions of the root zone with 'diff'. Now that the root is signed, that all goes to hell.
> Are there any reasonable tools that know how to look for differences in two versions of a modern zone? By "reasonable" I mean "ignores changes in NSEC and NSEC3 records and other things that are normal in the daily operation of a signed zone".

I've previously used a simple combination of "named-checkzone" and "egrep" to get a canonical sorted version of the zone and then remove the crud:

% dig @f.root-servers.net. . axfr > root.in
% named-checkzone -D -i none . root.in | \
  egrep -v '[[:space:]](NSEC|NSEC3)[[:space:]]' | \
  egrep -v '^;;' > root.out


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