3 Replies Latest reply on Jul 8, 2010 12:01 PM by greg@solarwinds.net

DNS Information Confusion

cj54487 Jul 8, 2010 11:29 AM

From a previous post I know that IPAT uses pointer records to return the DNS name of an used host.

When I use IPAT, for one of my subnets, I get very confusing responses regarding the DNS name.

The subnet in question does not have a reverse lookup zone defined for it. Yet I have some hosts with the correct DNS name in the DNS column, I have some hosts that are blank in the DNS column, and I have some hosts that say our company name in the DNS column. Any ideas, why the DNS column would not be blank for all hosts?

Re: DNS Information Confusion

greg@solarwinds.net Jul 8, 2010 11:41 AM (in response to cj54487)

Sure - There might be a reverse record in the WINs database, or the local machine's DNS cache.
IPAT makes a call to Winsock, which will query many sources including the local machine DNS cache, and any WINS and DNS servers that it knows about.
To view the local cache type the following at a command line: ipconfig /displaydns
To validate the result in IPAT, you can use ping -a to reverse resolve using the same methods.
'ping -a <ip address>'
HTH,
Greg
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- Re: DNS Information Confusion
  
  cj54487 Jul 8, 2010 11:53 AM (in response to greg@solarwinds.net)
  
  Thank you Greg. Is there a way to have IPAT ignore WINS entires? Also, where would I modify IPAT to change the DNS servers it uses?
  
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  - Re: DNS Information Confusion
    
    greg@solarwinds.net Jul 8, 2010 12:01 PM (in response to cj54487)
    
    Sure, remove the WINs server entries from your IPv4 configuration (but you may need them to resolve devices on your local network)...If you are using DHCP, you will have to do some manual configuration :)
    
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