I checked with Harvie, and he wanted this to hit the list

------- Forwarded Message Follows -------
From: "Harold Jarvie" <hjarvie@bigfoot.com>
Organization: BBSC
To: dan@freebsddiary.cx
Date sent: Tue, 1 Jun 1999 10:01:11 +1200
Subject: Re: who's running a porn site? <grin>
Send reply to: hjarvie@bigfoot.com
Priority: normal

> > > don't navigate by IP address?
> > Same thing is going to happen if DNS is not updated quickly surely?
>
> Hopefully not. When you change a site's IP address, it's wise to keep
> both active for some time. For example, if commissioning a new box or
> swapping from one web farm to another. After a certain time, say a day
> or so, all of the DNS entries around the world will have expired and
> will be looking for fresh entries from the primary server. -- Dan
> Langille - DVL

freebsddiary.cx => 210.55.152.55 your machine is 210.55.152.55
1. Your IP address changes
freebsddiary.cx => 210.55.152.55 your machine is 210.55.152.100
  Time passes
2. You notice the change and advise internic
freebsddiary.cx => 210.55.152.55 your machine is 210.55.152.100
   Time passes
3. Internic updates the primary
freebsddiary.cx => 210.55.152.100 your machine is 210.55.152.100
   The primary is now correct but cached info waits for timeout

   From 1. until 3. People using DNS to get to your site get someone
elses. You get hits from the previous owner of the IP until their DNS
update is complete ( as well as direct hits to the IP ie not thru DNS)

   After 3. If you use a Dynamic DNS you will only get hits to the IP as
   their
short ttl's expire quickly from caches.

--
Dan Langille - DVL Software Limited
The FreeBSD Diary     - http://www.FreeBSDDiary.org/freebsd/
NZ FreeBSD User Group - http://www.nzfug.nz.freebsd.org/
The Racing System     - http://www.racingsystem.com/racingsystem.htm
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