Date: Fri, 4 May 2001 17:40:15 +0200 From: Edwin Groothuis <edwin@mavetju.org> To: Wayne Pascoe <wayne.pascoe@realtime.co.uk> Cc: freebsd-questions@freebsd.org Subject: Re: Purpose of serial number in zone files (BIND) Message-ID: <20010504174015.F50786@d9168.upc-d.chello.nl> In-Reply-To: <m1bsp9duap.fsf@zaphod.realtime.co.uk>; from wayne.pascoe@realtime.co.uk on Fri, May 04, 2001 at 04:10:22PM %2B0100 References: <m1wv7xdww5.fsf@zaphod.realtime.co.uk> <20010504163252.D50786@d9168.upc-d.chello.nl> <m1k83xdvu3.fsf@zaphod.realtime.co.uk> <00ae01c0d4ab$9160cbf0$8701a8c0@bottleneck2000> <m1bsp9duap.fsf@zaphod.realtime.co.uk>
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On Fri, May 04, 2001 at 04:10:22PM +0100, Wayne Pascoe wrote: > "Elliott Perrin" <eperrin@bigorbit.com> 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
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