Re: [cobalt-users] New IP Block - what the best way to add these

["E.B. Dreger" <eddy+public+spam@xxxxxxxxxxxxxxxxx>]

C> Date: Thu, 21 Aug 2003 22:07:01 +1200
C> From: Chae


C> RAQ3 with ns & ns2 name servers on the same server ?(was
C> already set-up like this when I got the machine)

It may have been that way, but you really should fix it. :-)


C> 1. Change IP address of one of the main DNS servers IP's to
C>    the new IP
C> 2. Ensure there is a virtual site created or changed so the IP
C>    binds via the GUI
C> 3. Then with one of the DNS servers using a new IP and a old
C>    IP begin to make changes to customers DNS Records and site
C>    configs

Not quite.  Run DNS on _both_ old and new IP addresses, so you
have functioning DNS no matter what.  Change the NS's IP address
at the registrar ASAP.


C> 4. When sites procreate and start using new IP's then change
C>    the remaining Name servers IP to the new IP allocated.

No.  First crank down your TTLs, and wait until the gTLD TTL
interval has passed.  Run sites on both old and new IPs
simultaneously if you wish to prevent downtime entirely; some
places are rude enough to ignore TTLs, so you want things running
on BOTH groups of IP addresses.


C> Someone correct me if I'm wrong please as I don't want any
C> customers having downtime if possible.

The trick is responding on old _and_ new IP addresses until
cached copies of old info are gone.  Anything else will result in
downtime -- short downtime if done right, but still downtime.


Eddy
--
Brotsman & Dreger, Inc. - EverQuick Internet Division
Bandwidth, consulting, e-commerce, hosting, and network building
Phone: +1 785 865 5885 Lawrence and [inter]national
Phone: +1 316 794 8922 Wichita
_________________________________________________________________
          DO NOT send mail to the following addresses :
  blacklist@xxxxxxxxx -or- alfra@xxxxxxxx -or- curbjmp@xxxxxxxx
Sending mail to spambait addresses is a great way to get blocked.