Windows 7 No Internet DNS Issue

[ClickRight]

Windows 7 No Internet DNS Issue (SOLVED)

So I have a client's Windows 7 HP SP1 Netbook in. Won't connect to the internet.

Client was using Norton then went to Mcafee and since the internet won't work. I uninstalled Mcafee and ran the removal tool for Norton & Mcafee, still no internet.

Then I ran D7:
- Reset network interface
- Reset Winsock
- Repair Windows firewall
- MS FixIt for Winsock
- Also ran Ms FixIt for Winsock on aggressive mode

Also:
- Flushed the DNS resolver cache
- Ensured no proxies setup in IE / other browsers
- Ran the latest Mcafee and Norton removal tools again, just in case.

Alas, there is no internet by domain name, however I can ping locally and to the internet and I can access websites via their IP address--So I have a DNS problem but where?

 

[Larry Sabo]

System restore?

............................................

 

[dacoffey]

What is the DNS server set as?

Can you try using an alternative DNS server such as Google's public 8.8.8.8 ?

 

[nonchalant]

Have you checked the router config/firewall?

Also, delete the HOSTS file.

 

[alluseridsrejected]

When I can not get any of what you already tried to fix it, I just delete the local area connection and reboot. Works sometimes. If that doesn't work, maybe SFC or a repair install.

 

[altrenda]

Are you using open dns? A problem in a Microsoft patch causes a connection problem with win 7 and opendns, according to their blog.

http://forums.opendns.com/comments.php?DiscussionID=16465

 

[ClickRight]

Are you using open dns? A problem in a Microsoft patch causes a connection problem with win 7 and opendns, according to their blog.

http://forums.opendns.com/comments.php?DiscussionID=16465

What the tech!? Why yes I am... hardcoded into our router. I will try an alternate DNS tomorrow

 

[ClickRight]

Have you checked the router config/firewall?

Also, delete the HOSTS file.

Ok well it's not open DNS. Changed to Google DNS and still no internet.

Hosts file deleted, router is good -- all other machines connect ok and the windows firewall is disabled (and I tried resetting it)

My client doesn't know when the internet was working, so system restore it out (I find it usually causes more problems than good anyways)

This is really mind boggling!

 

[ClickRight]

Well this is very strange... the internet works in 64-Bit IE, but not in 32-bit, also doesn't work in Chrome or Firefox, WTF is going on!?

 

[dacoffey]

What output do you get from running the following commands?

> nslookup google.com
> nslookup google.com 8.8.8.8

 

[ClickRight]

What output do you get from running the following commands?

> nslookup google.com
> nslookup google.com 8.8.8.8

C:\Users\XXX>nslookup google.com
Server:  resolver1.opendns.com
Address:  208.67.222.222

Non-authoritative answer:
Name:    google.com
Addresses:  2607:f8b0:400a:800::1006
          173.194.33.7
          173.194.33.8
          173.194.33.0
          173.194.33.3
          173.194.33.6
          173.194.33.4
          173.194.33.5
          173.194.33.14
          173.194.33.9
          173.194.33.1
          173.194.33.2


C:\Users\XXX>nslookup google.com 8.8.8.8
Server:  google-public-dns-a.google.com
Address:  8.8.8.8

Non-authoritative answer:
Name:    google.com
Addresses:  2607:f8b0:400a:800::1004
          173.194.33.9
          173.194.33.7
          173.194.33.2
          173.194.33.8
          173.194.33.4
          173.194.33.5
          173.194.33.1
          173.194.33.0
          173.194.33.14
          173.194.33.3
          173.194.33.6

Also, Windows update works (downloading)... weird!

 

[dacoffey]

Are any proxies enabled in the various browsers?

 

[ClickRight]

Are any proxies enabled in the various browsers?

Nope. proxies cleared Updates went through, rebooted, and still no internet

 

[dacoffey]

The nslookup output indicates system DNS seems to be working.

So 64-bit IE will resolve domains and load pages correctly, but 32-bit IE, Chrome, and FF all act as if they cannot resolve domain names?

 

[ClickRight]

The nslookup output indicates system DNS seems to be working.

So 64-bit IE will resolve domains and load pages correctly, but 32-bit IE, Chrome, and FF all act as if they cannot resolve domain names?

Correct. I can browse via IP address in all browsers also.

 

[dacoffey]

In chrome, enter this into the address bar:

chrome://net-internals/#dns

Click the 'Clear Host Cache' button

Open a new tab and try to load http://google.com

You can switch back to the chrome net-internals tab and see if the requests were resolved or if they are still queued by clicking 'View pending lookups'

 

[ClickRight]

In chrome, enter this into the address bar:

chrome://net-internals/#dns

Click the 'Clear Host Cache' button

Open a new tab and try to load http://google.com

You can switch back to the chrome net-internals tab and see if the requests were resolved or if they are still queued by clicking 'View pending lookups'

Hostname	Family	Addresses	Expires
clients1.google.com	UNSPECIFIED	error: -105 (ERR_NAME_NOT_RESOLVED)	2012-11-14 10:18:17.681 [Expired]
google.ca	UNSPECIFIED	error: -105 (ERR_NAME_NOT_RESOLVED)	2012-11-14 10:18:46.153 [Expired]
linkhelp.clients.google.com	UNSPECIFIED	error: -105 (ERR_NAME_NOT_RESOLVED)	2012-11-14 10:19:05.065 [Expired]

This is really mind boggling! Also ran Microsoft Fix it 50199 to reset Internet Protocol (TCP/IP) and tried it manually

 

[dacoffey]

Does the following command give any output?

> netsh winsock audit trail

 

[ClickRight]

Does the following command give any output?

> netsh winsock audit trail

Nope, no output.
//Filler

 

[dacoffey]

How about this one?

> netsh winhttp show proxy