The answers given by the DNS have a TTL, and will automatically be
flushed when they are no longer valid. Arbitrarily flushing the cache
for everyone is not correct behavior.
What I would suggest doing instead (in your case) is changing the
reconfig to a restart in /etc/network/if-up.d/bind9, which will flush
the cache instead of just noticing IP address changes - it's being on
the different network that is causing you to live in another view (I
hope).
lamont
** Changed in: bind9 (Ubuntu)
Assignee: (unassigned) = LaMont Jones (lamont)
Status: New = Invalid
** Changed in: bind9 (Debian)
Status: New = Invalid
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bind9 should flush the DNS cache on suspend / resume to avoid stale records
https://bugs.launchpad.net/bugs/306706
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