?
Solved

Delete Static Reverse DNS Entries

Posted on 2009-07-10
11
Medium Priority
?
1,069 Views
Last Modified: 2012-06-27
We have a number of static entries in our reverse dns zone for PCs.  These PCs were upgraded from W2K to XP and now I'm seeing the XP machines in forward and two entries for them in reverse - one static and the other dynamic.  

For example in Forward - WXP-Machine1=192.168.1.115
In Reverse - 192.168.1.115 = W2K-Machine 1 (static) and 192.168.1.115=WXP-Machine1 (dynamic).  I have deleted the old entry, but it doesn't stay deleted.  

This is AD integrated with DC doing DHCP and DNS.  Scavenging is turned on.  Under 30 machines total.  

Would it work to delete the Reverse DNS zone and then recreate it?  Any other suggestions

Thanks
0
Comment
Question by:normajm400
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 5
11 Comments
 
LVL 71

Expert Comment

by:Chris Dent
ID: 24829850

Deleting the zone would certainly work, bit of a sledgehammer approach though. Mind you, the other option involves scripting it (unless you happen to have a 2008 / Vista box available).

Chris
0
 

Author Comment

by:normajm400
ID: 24833157
Could you please explain a bit more on the scripting approach.  I have both 2008 Server and Vista boxes available.
0
 
LVL 71

Expert Comment

by:Chris Dent
ID: 24838052

Windows 2008 / Remote Server Admin Tools (Vista) adds a column to the DNS console which allows you to see the record time-stamp. If the record is static it says so.

That means you can simply order by the Time Stamp column then select those and delete the lot if that's what you need.

The scripting approach would only do the same, still want it?

Chris
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 

Author Comment

by:normajm400
ID: 24844024

Yes, the timestamp column is showing and those entries I want to remove do show static.  In fact, I have deleted them numerous times, but they always come back.  Is there some type of ownership or security on them that recreates these entries?



0
 
LVL 71

Accepted Solution

by:
Chris Dent earned 750 total points
ID: 24847072

They come back as static records? That's quite surprising, if records are dynamically added they normally come with a time stamp value.

Chris
0
 

Author Comment

by:normajm400
ID: 24854318
I think these records were carryover from long ago (Windows 2000 server/Windows sbs 2003/Windows sbs 2008).  It's time to get them cleaned out.
0
 
LVL 71

Expert Comment

by:Chris Dent
ID: 24857135

I'm just surprised they're coming back. That's not really normal behaviour unless the hosts exist on the network, and if they do I'd expect them to come back with time-stamps.

It's possible to delete them via AD rather than DNS, which really gets rid of them, but it shouldn't be necessary.

Chris
0
 

Author Comment

by:normajm400
ID: 24862458
The W2K hosts no longer exist.  The W2K computers are not listed in AD.  However, the NICs exists as these PCs were updated to XP and given new names.   The W2K systems were not removed from the domain prior to updating.   The WXP PCs are getting forward and reverse dynamically.  However, the W2K version must have been set up as static somewhere along the line and just won't release.  I figure this must be all tied to the NIC MAC. I wonder if I put new NICs in those systems if this problem would clear up?
0
 
LVL 71

Expert Comment

by:Chris Dent
ID: 24862480

It would be worth checking DHCP. DNS won't have anything to do with the MAC address.

Chris
0
 

Author Comment

by:normajm400
ID: 24875669
I checked DHCP and found this - the Scope has the DNS tab set to dynamically update DNS.  In SBS 2008, the next level up is either IPv4 or IPv6.  DNS can also be set at that level and is not.  Would it be advantageous to set it at that level, too.  Can it be set at both or is limited to one or the other?
0
 

Author Closing Comment

by:normajm400
ID: 31602358
Thank you Chris for your help.  However, the problem is not solved.
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is intended as an extension of a blog on Aging and Scavenging by the MS Enterprise Networking Team. In brief, Scavenging is used as follows: Each record in a zone which has been dynamically registered with an MS DNS Server will have…
Resolve DNS query failed errors for Exchange
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
Suggested Courses

801 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question