How to check slave zone freshness

[Tony Finch]

Mark Andrews <marka at isc.org> 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 :-)

Tony.
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