Understanding TTL in "rndc dumpdb"-output
Tom
tomtux007 at gmail.com
Mon Oct 22 15:16:49 UTC 2018
Hi
After querying my resolver for "testbla11.example.com", I receive a
NXDOMAIN response with a minimum-ttl (in the soa) of 3600.
When I afterwards dump the cache of my resolver (9.12.2-P1) with "rndc
dumpdb" and look for the negative ttl, then a value much bigger than
3600 is shown (608363):
# grep testbla /var/named/data/named_dump.db
testbla11.example.com. 608363 \-ANY ;-$NXDOMAIN
This number decrements every second.
What is this number? The same behavior for positive answers too. The
A-record for "www.google.com" has a TTL for 300 seconds. In the "rndc
dumpdb"-output I have a value for 605082.
Any hints?
Thank you.
Kind regards,
Tom
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