zone file settings question
atkac at redhat.com
Mon Oct 15 18:39:14 UTC 2007
On Mon, Oct 15, 2007 at 01:33:29PM -0400, Madison Kelly wrote:
> Hi all,
> I was trying to find out what certain settings effect. For example,
> in a zone file with the following...
> $ORIGIN .
> $TTL 38400 ; 10 hours 40 minutes
> domain.com IN SOA ns1.nsserver.com. admin.domain.com. (
> 2007101501 ; serial
> 10800 ; refresh (3 hours)
> 3600 ; retry (1 hour)
> 86400 ; expire (1 day)
> 38400 ; minimum (10 hours 40 minutes)
> What do these fields mean?
> - refresh
> Would I be right in guessing that this time is how often a client would
> try to check the zone for updates, but failing to get a response would
> keep using the TTL so long as it was valid?
Means how often secondary nameservers transfer zone from primary
> - retry
> Is this the amount of time, after a failed attempt to contact the
> server, that a client would wait before trying again?
If zone transfer isn't successfull this specify how often will secondary retry transfer
> - expire
> How is this different from 'ttl'?
When secondary server can't get zone from primary after this time secondary server stops returning authoritative responses for domain
> - minimum
> Not sure even of a guess...
I think currently means negative TTL - how long will be cached that resource record doesn't exist
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