Using the “Scavange” feature of Microsoft DNS

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Microsoft Windows
I am looking for advice on enabling the Microsoft feature for DNS scavanging. My environment is MS Active Directory with a mix of 2000 and XP clients using MS DHCP and several server systems using fixed IP addresses (both Windows 2000 servers and various Linux servers). Can anyone outline for me: 1.) What if anything I need to do in preparation before I enable this feature? (i.e. manually clean-up old DNS records) 2.) Are there any "downsides" to enabling this feature? 3.) What affect (if any) does this feature have on manually configured entries (like aliases, MX records, etc.)? 4.) In general, is this a good idea (since Ms has it disabled by default)? Any help is greatly appreciated. Thanks, Mike
ASKED: April 8, 2005  9:01 AM
UPDATED: April 8, 2005  7:26 PM

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Thanks. We'll let you know when a new response is added.

Let me begin by saying this: Rarely does a feature that Microsoft doesn’t set on by default mean that it is disabled for a good reason. I still cannot explain why they believe that the repair directory under the SystemRoot directory is readable by Users as a default setting…

Politics aside, you should enable Scavenging for DNS records as long as you are allowing Dynamic entries in your DNS database. Otherwise, a computer that registers itself in the DNS will never expire. Say you set up a test system on your network and never boot it again, the record will remain as long as the DNS database remains without scavenging. You do not need to clean up the database prior to enabling it, but make sure everything is set up properly before turning it on.

See the following site for a description of setting up scavenging: http://www.windowsitpro.com/Windows/Article/ArticleID/19897/19897.html

Hope this helps,
SF

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