From owner-freebsd-questions  Sat Feb 20 12: 6: 7 1999
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Date: Sat, 20 Feb 1999 15:06:37 -0500 (EST)
From: hometeam <hometeam@techpower.net>
To: Dan Langille <junkmale@xtra.co.nz>
Cc: Namodn ROOT <root@namodn.com>, dan@wolf.com,
	freebsd-questions@FreeBSD.ORG
Subject: Re: off-site secondary DNS
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why access so often ? 

On Sun, 21 Feb 1999, Dan Langille wrote:

> I dunno.  It depends on the circumstances I suppose.  Why did you suggest 
> those values?
> 
> On 20 Feb 99, at 14:40, hometeam wrote:
> 
> > 
> > wouldn't these be a bit better?
> > 
> > 			        86400   ; Refresh
> >                                 21600    ; Retry
> >                                 604800  ; Expire
> >                                 86400)  ; Minimum TTL
> > 
> > 
> > On Sun, 21 Feb 1999, Dan Langille wrote:
> > 
> > > Most people now use a serial number of the form YYYYMMDDHHMM.  And the 
> > > refresh rate determines how often the secondary will check the primary for 
> > > a more recent serial number.  Here's an example of these values from my 
> > > website:
> > > 
> > > @       IN SOA  mydomain.com.   root.freebsd.mydomain.com.        (
> > >                              199902210845  ; Serial
> > >                              3600    ; Refresh
> > >                              300     ; Retry
> > >                              3600000 ; Expire
> > >                              3600  ) ; Minimum
> > > 
> > > The above shows that I modifed the zone files on 21 Feb 1999 at 08:45.  
> > > The secondary will compare that serail value to it's own.  If the primary 
> > > contains a newer value, the secondary will request a zone transfer.  The 
> > > secondary will check the primary's serial number every 3600 seconds (every 
> > > hour).
> > > 
> > > Sorry.  I really should have said all this the first time.
> 
> 
> --
> Dan Langille
> The FreeBSD Diary
> http://www.FreeBSDDiary.com/freebsd
> 



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