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Unknown Strange DNS entries related to "(same as parent folder)" domain name

Hi,
When I do a nslookup on my domain name Peknor.com it gives me 5 ip's  3 of them are my domain controllers and the other 2 are unknown address 172.23.22.0 10.95.2.0.
I don't know why would they end by 0's and I also when I look in the DNS list the host name is  (same as parent folder)??

tx!


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SigSupport
Asked:
SigSupport
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4 Solutions
 
kernelcopCommented:
Typically, IP addresses ending in Zeroes are 'Network IDs". These are reserved and not used.
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Chris DentPowerShell DeveloperCommented:

Delete them and see if they come back :)

If they do, one of your DCs is likely to be registering them, which would lead onto checking your DCs to see if they have any adapters configured with those addresses.

Chris
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SigSupportAuthor Commented:
Hi Chris-Dent,
I'm not too hot about the technique of deleting something just to see the result especially on a production DC :)
One of them is 10.95.2.0 which is our ip phone Vlan which I don't see why it would be listed there and not any other vlans. The other one are a subnet of one of our entities which we have a permanent vpn tunnel with them but here again why would our other permanent vpn tunnels not be listed there if this one is.
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Chris DentPowerShell DeveloperCommented:

Those entries are used for DFS and Group Policy application. The only records listed should be the IP addresses of your DCs.

Network addresses for VLANs have no reason to be there and should be removed.

Chris
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DrDave242Commented:
I concur with Chris; those extraneous records should be deleted.  "(Same as parent folder)" host records refer to the domain itself rather than a specific host name within the domain.  In an AD domain, only your domain controllers' IP addresses should be listed in those records, or you may experience problems with authentication, replication, etc.
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kernelcopCommented:
I agree with deletion of bogus records. Appropriate records will re-propagate over a short time as requests are serviced by DNS for clients/devices. No harm can be done.
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SigSupportAuthor Commented:
They didn't recreate them self and all is working good so far.
tx!
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