How to check slave zone freshness

Tony Finch dot at
Tue Feb 9 11:18:18 UTC 2016

Mark Andrews <marka at> wrote:
> With a modern nameserver that supports the expire edns option you can
> also do "dig +expire soa zone @server" which will tell you how long
> until the zone will expire on this server.

By "modern", Mark means BIND 9.10 or later :-)

f.anthony.n.finch  <dot at>
Thames, Dover: Southwest 6 to gale 8, veering west 5 to 7, perhaps gale 8
later. Moderate or rough. Rain or showers. Good, occasionally poor.

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