From owner-freebsd-questions Fri May 4 8:40:19 2001 Delivered-To: freebsd-questions@freebsd.org Received: from d9168.upc-d.chello.nl (d9168.upc-d.chello.nl [213.46.9.168]) by hub.freebsd.org (Postfix) with ESMTP id 269FE37B424 for ; Fri, 4 May 2001 08:40:16 -0700 (PDT) (envelope-from edwin@d9168.upc-d.chello.nl) Received: by d9168.upc-d.chello.nl (Postfix, from userid 1001) id 13245428; Fri, 4 May 2001 17:40:15 +0200 (CEST) Date: Fri, 4 May 2001 17:40:15 +0200 From: Edwin Groothuis To: Wayne Pascoe Cc: freebsd-questions@freebsd.org Subject: Re: Purpose of serial number in zone files (BIND) Message-ID: <20010504174015.F50786@d9168.upc-d.chello.nl> Mail-Followup-To: Edwin Groothuis , Wayne Pascoe , freebsd-questions@freebsd.org References: <20010504163252.D50786@d9168.upc-d.chello.nl> <00ae01c0d4ab$9160cbf0$8701a8c0@bottleneck2000> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from wayne.pascoe@realtime.co.uk on Fri, May 04, 2001 at 04:10:22PM +0100 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, May 04, 2001 at 04:10:22PM +0100, Wayne Pascoe wrote: > "Elliott Perrin" writes: > > > If you host foo.com and someone from ISP1 has requested > > http://www.foo.com they will get the record from your servers. Now > > if you make a zone file change, and the serial stays the same, the > > user on ISP 1 will make a request for say, www2.foo.com, which you > > have moved from 192.168.1.1 over to 192.168.1.5..... Well, the user > > on ISP1 will never know about the move, and will try to connect to > > the old address cause ISP1's cache has not seen the serial number > > increment.....and will not see it until your expiry is reached..... > > > > AFAIR --- all DNS servers, BIND or otherwise must have a serial > > number declared (I know that the crackhead DNS on Win boxes does, > > MacDNS, etc..... all have to use serials) > > Perfect! That's exactly what I was asking. So machines other than > secondaries do use it, so I do need to implement it. DNS servers which are not authorative for a zone do not have the SOA field, they only have the Time To Live for that single record. Edwin -- Edwin Groothuis | Personal website: http://www.MavEtJu.org edwin@mavetju.org | Interested in MUDs? Visit Fatal Dimensions: ------------------+ http://FatalDimensions.nl.eu.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message