Potential DNS Errors - Spiceworks

Hi Experts,

I have just started using SpiceWorks which I am really enjoying.

it does however come up with some 'Potential DNS Errors' which I don't understand what they are and what it even thinks is going wrong. it looks like random PC's on the network are attempting to communicate (query) with each other constantly?

the list is very long so I have only attached a small snapshot.

a couple did pass and have green ticks.

Potential-DNS-Errors.PNG
LVL 2
peggiegregAsked:
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masnrockCommented:
Do you have the IP address(es) in question? Check your internal DNS server and check for reverse lookup records.
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DLeaverCommented:
It appears as though it may be achieving the reverse lookup but then the IP's are not matching the hostnames.  This could be an indication of stale DNS records, which can build up over time and cause this issue.

To eliminate stale records use DNS scavenging (check if it is enabled first, and then if it is working)

The KB on this is below, as well as some more user friendly info from Ace Fekay who is a well known MS expert in this area.

https://technet.microsoft.com/en-us/library/cc755716(v=ws.10).aspx

http://blogs.msmvps.com/acefekay/2009/08/20/dhcp-dynamic-dns-updates-scavenging-static-entries-amp-timestamps-and-the-dnsproxyupdate-group/

It won't be an instantaneous fix, due to the way scavenging works so it would be worth interrogating your DNS first to see if stale records are an issue and then you can benchmark the state of the DNS before and after DNS scavenging has run.
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peggiegregAuthor Commented:
@Dleaver,

using the links I have enabled this feature, what you have mentioned sounds spot on for what could be causing this.
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