what is "SCAVENGING" option in DNS Server?


1. This is related to SCAVENGING option in DNS server
2. My questions: i) Please firstly explain it with your own WORDING and then give the links if necessary, ii) What is Scavenging option?, iii) How to configure it?, iv) Any Samples?
3. Thank you

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asrdiasConnect With a Mentor Commented:
In my words Scavenging is a clean up process to remove old DNS records that might lead to DNS poisoning.
For example:

Server named "Server1" record points to
This servers gets retired and you add a new server named "Server1" with ip address 192.168.20
Yes, The same server name diffrent IP but can lead to pointing clients to old IP address if both records are present. Scavenging will take care of removing the old one.
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Chris DentConnect With a Mentor PowerShell DeveloperCommented:

> DNS poisoning

It's not really poisoning, that implies a malicious action. It's just house-keeping.

asrdiasConnect With a Mentor Commented:
Chris-Dent: you are correct. I must clarify that from my point of view I was not referring to DNS cache poison attacks.
From my point of view the cache becomes poisoned if contains invalid or misleading records. The way they get there is a secondary issue to analyze.
Mike KlineConnect With a Mentor Commented:

Probably one of the best articles I've found on this subject is here from the MS Networking team.

Don't be afraid of DNS Scavenging. Just be patient

My own words would not have been as good as that article :)

Hope that helps

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