From owner-freebsd-questions  Sat Feb 20 11:52:33 1999
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From: "Dan Langille" <junkmale@xtra.co.nz>
Organization: The FreeBSD Diary
To: hometeam <hometeam@techpower.net>
Date: Sun, 21 Feb 1999 08:48:13 +1300
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Subject: Re: off-site secondary DNS
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Cc: Namodn ROOT <root@namodn.com>, dan@wolf.com,
	freebsd-questions@FreeBSD.ORG
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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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