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 From:  "Neil A. Hillard" <m0n0 at dana dot org dot uk>
 To:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] DNS (Off Topic) Question
 Date:  Sat, 20 Oct 2007 17:53:49 +0100

        assuming that this is zingleman.com then the TTL appears to be
set to 4 hours.  The whole point of the TTL is to reduce the number of
DNS queries, enable local DNS servers to cache responses and increase

In this case, local DNS servers will cache each lookup for 4 hours,
therefore the change will take up to 4 hours to propagate, hence the
reason for lowering the TTL at least 4 hours before the change takes

You cannot simply state that it will take 15 minutes and be correct!


In message <000901c81335$bbd1ea70$3375bf50$@com>, David Haché
<dave at dhache dot com> writes
>I would not suggest that neither.  Usually Dns update around the world in
>about 15 min.
>And most dns providers don't care for the TTL value you put so it's not bad
>to change the ttl but it will most likely not do anything.
>Change it when you have your ip and you will be ok.
>-----Original Message-----
>From: Ernie Zingleman [mailto:ks4q at zingleman dot com]
>Sent: October-20-07 10:34 AM
>To: m0n0wall at lists dot m0n0 dot ch
>Subject: [m0n0wall] DNS (Off Topic) Question
>This is an off topic question but I figured the experienced users here could
>answer it for me.
>I'm transitioning from one static IP to another as I switch DSL providers in
>a day or two. I've got a host name that users employ to connect to me.
>The new static IP is not working yet.  However, in preparation for the
>transition and to minimize downtime and failed connections, can I add my new
>static IP to my DNS records as a second entry?
>Or, am I better just having one entry at a time for my hostname?
>Thanks in advance, Ernie
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Neil A. Hillard                E-Mail:   m0n0 at dana dot org dot uk