On Fri, Nov 03, 2006 at 12:37:44 -0800, jdow <jdow@xxxxxxxxxxxxx> wrote: > > If it goes down for an extended period of time, as with a power loss > and the UPS ran down, then when the UPS and machine come back up say > a day or two later it will take a long time for the various DNS servers > to find it again. It's better to have someone providing secondary > name server for you. It's usually cheap. And you can configure it to > update from your name server when you change your server's data. Only if you conside "long" to be a couple of minutes. Negative cache entries aren't supposed be cached very long. While there are some ISPs that ignore TTLs, I haven't heard of many that cache negative entries for extended periods of time.
