June 2018
Intermediate to advanced
368 pages
11h 1m
English
Content preview from Managing Mission - Critical Domains and DNS
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When the format of the Serial actually matters
Aside from every time you update the zone, conflicting formats of the serial number can become an issue when you are moving domains between nameserver delegations, moving masters or adding secondaries. If your master is using one format (for example, Unix timestamp) and your secondaries already have a copy of your zone with a date-based serial, you can wind up with the latter neglecting to refresh the zone because it thinks its current copy is more recent than the master:
10-May-2018 11:21:43.848 client 64.68.198.83#13014: received notify for zone 'example.com'May1011:21:43 mia named[4404]: zone example.com/IN: notify from 64.68.198.83#13014: zone is up to date
The remedy in these situations ...
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