Solved

Windows 7 stops resolving DNS

Posted on 2014-02-05
6
439 Views
Last Modified: 2014-02-12
Intermittently, numerous PCs with Windows 7 stop resolving DNS for a site (no specific site -www.wyff4.com today). When this happens the browser displays a server not found error. Using command prompt, cannot ping the name (could not find host). Use NSLOOKUP www.wyff4.com and an IP address is returned. Able to ping the IP address or type IP in browser and get to site. Able to ping or browse to other sites by name. Using Wireshark no DNS entries show up. If DNS cache is flushed or the DNSClient service is disabled it starts functioning. 3000 node network. Have been looking for solution several days.
0
Comment
Question by:rfairchilds
[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
  • 3
  • 2
6 Comments
 
LVL 19

Expert Comment

by:regmigrant
ID: 39837263
some things to try -

if you're not using ipv6 remove it from the network setup

If you are - and for Ipv4 - make sure you have Obtain DNS server automatically checked in advanced settings - unless you are manually configuring opendns

the nslookup might be a red herring - it might be resolving in the local cache before you flush it

I'd suggest reinstalling driver for network card but you mentioned its multiple PC, are they all identical, same driver etc?
0
 
LVL 81

Expert Comment

by:David Johnson, CD, MVP
ID: 39837283
what are your dns server entries?
0
 

Author Comment

by:rfairchilds
ID: 39839238
IPV6 disabled
DNS automatic
Will check local cache next time it happens.
Multiple machines, assorted hardware.
We have two internal DNS servers that are handed out via DHCP.
The really curious thing about this is that no requests are made via the NIC when this happens (according to Wireshark).
Wondering if it is mistakenly using some other interface that it shouldn't.
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 19

Expert Comment

by:regmigrant
ID: 39841588
If its always the same machines that are affected you could try changing some of them over to an alternate DNS (manually)  -opendns for example- and see if it still occurs; then you can at least prove that the problem is local.

I'd also check the network routing tables if you are looking for other interfaces (route.exe).

It might also be worth recording the route, nslookup and ipconfig info on one of the machines when its working for a before/after comparison
0
 

Accepted Solution

by:
rfairchilds earned 0 total points
ID: 39841643
Thanks for the help. We finally caught a request going to our DNS server that didn't respond so we have opened a case with our DNS vendor. Thanks for all the assistance.
0
 

Author Closing Comment

by:rfairchilds
ID: 39852785
The problem was found in house.
0

Featured Post

Flexible connectivity for any environment

The KE6900 series can extend and deploy computers with high definition displays across multiple stations in a variety of applications that suit any environment. Expand computer use to stations across multiple rooms with dynamic access.

Question has a verified solution.

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

Suggested Solutions

If you need to start windows update installation remotely or as a scheduled task you will find this very helpful.
There are many software programs on offer that will claim to magically speed up your computer. The best advice I can give you is to avoid them like the plague, because they will often cause far more problems than they solve. Try some of these "do it…
Windows 8 comes with a dramatically different user interface known as Metro. Notably missing from the new interface is a Start button and Start Menu. Many users do not like it, much preferring the interface of earlier versions — Windows 7, Windows X…
This is used to tweak the memory usage for your computer, it is used for servers more so than workstations but just be careful editing registry settings as it may cause irreversible results. I hold no responsibility for anything you do to the regist…

737 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