Solved Workstation still pings by name after deletion from DNS

April 10, 2012 at 08:54:01
Specs: Windows XP, Intel 2GHz / 4 gigs
I deleted the computer account from Active Directory, deleted the forward and reverse DNS entries for that box from both DNS servers,ran IPCONFIG /FLUSHDNS, ran NBTSTAT -RR, and ran ARP -d * from both domain controllers and on my workstation, but I can still ping that box by name (ping 3748-138-ws02) and it replies with its IP address and Lost = 0 -- from both domain controllers (hosting DNS) and from my workstation as well.
Where is the resolution of name to IP address occurring when there are no DNS entries, the DNS cache is flushed, the ARP table is emptied, and NetBIOS entries are removed?

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#1
April 10, 2012 at 09:17:18
do a nslookup 3748-138-ws02 and post the results here for review

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#2
April 10, 2012 at 11:17:13
[Note: I "x'd-out" the first 2 octets of the ip addresses for security reasons.]

nslookup 3748-138-ws02
Server: crry-nsdc-t01.nttc.usn.nsa
Address: xxx.xxx.4.13

DNS request timed out.
timeout was 2 seconds.
*** Request to crry-nsdc-t01.nttc.usn.nsa timed-out

Results of ping:

ping 3748-138-ws02

Pinging 3748-138-ws02 [xxx.xxx.19.133] with 32 bytes of data:

Reply from xxx.xxx.19.133: bytes=32 time<1ms TTL=128>
Reply from xxx.xxx.19.133: bytes=32 time<1ms TTL=128>
Reply from xxx.xxx.19.133: bytes=32 time<1ms TTL=128>
Reply from xxx.xxx.19.133: bytes=32 time<1ms TTL=128>

Ping statistics for xxx.xxx.19.133:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms


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#3
April 10, 2012 at 11:17:19
✔ Best Answer
Is the client using a DHCP address? If so, I believe the Windows DNS server will create a dynamic DNS record for it whether it is joined to the domain or not.

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Related Solutions

#4
April 10, 2012 at 11:19:00
We use all static IP addresses throught the domain - no DHCP anywhere.

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#5
April 10, 2012 at 11:47:43
nslookup failed. something is not right with your dns setup
should have come back with record not found

Do a nslookup by ip address

any Wins servers?
hosts files being used anywhere?

do a tracert 3748-138-ws02 and lets see the path to the pc

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#6
April 10, 2012 at 12:50:02
You're using a class-B network? And as you're worried about showing us the first two octets, presumably it's a real class-B not a non-routeable one such as 10.0.0.0. Correct?

Just another thought; try stopping and restarting both of the DNS servers.


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#7
April 10, 2012 at 13:11:41
It's US Navy ip.

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#8
April 10, 2012 at 13:29:39
Somebody reconfigured the workstation with DHCP instead of a static IP. So I reconfigured the NIC settings, disjoined from domain and rejoined. All is well now.
Thanks for the assistance everyone. Appreciated.

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