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SBS DNS not working for all client workstations

I am in the process of adding 8 new client workstations (all identical)  to a SBS 2003 SP2. I have used http://server_name/ConnectComputer sucessfully to add two of the computers onto the domain. Both are configured for dynamic ip address via DHCP, however I'm having problems with internet connection. One of the workstations connects ok, but the other will not connect. (Page cannot be displayed error). On the problematic workstation I can ping www.google.co.uk and ping 66.102.9.104 sucessfully, but cant get an internet connection. I'm thinking it could be a DNS error, but then why would it work or one workstation and not the other, additionally why would it resolve www.google.co.uk if dns was incorrect.

Ipconfig from working machine:
Windows IP Configuration
        Host Name . . . . . . . . . . . . : PEPCSL-PC7
        Primary Dns Suffix  . . . . . . . : pepcsl.local
        Node Type . . . . . . . . . . . . : Hybrid
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . : pepcsl.local
                                            PEP-SERVER.pepcsl.local
Ethernet adapter Local Area Connection:
        Connection-specific DNS Suffix  . : PEP-SERVER.pepcsl.local
        Description . . . . . . . . . . . : NVIDIA nForce Networking Controller
        Physical Address. . . . . . . . . : 00-19-99-53-59-3B
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 172.16.1.21
        Subnet Mask . . . . . . . . . . . : 255.255.0.0
        Default Gateway . . . . . . . . . : 172.16.1.200
        DHCP Server . . . . . . . . . . . : 172.16.1.33
        DNS Servers . . . . . . . . . . . : 172.16.1.33
        Primary WINS Server . . . . . . . : 172.16.1.33
        Lease Obtained. . . . . . . . . . : 22 April 2009 11:25:19
        Lease Expires . . . . . . . . . . : 30 April 2009 11:25:19

ipconfig from workstation with internet access problem:

Windows IP Configuration
        Host Name . . . . . . . . . . . . : PEPCSL-PC8
        Primary Dns Suffix  . . . . . . . : pepcsl.local
        Node Type . . . . . . . . . . . . : Hybrid
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . : pepcsl.local
                                            PEP.pepcsl.local

Ethernet adapter Local Area Connection:
        Connection-specific DNS Suffix  . : PEP.pepcsl.local
        Description . . . . . . . . . . . : NVIDIA nForce Networking Controller
        Physical Address. . . . . . . . . : 00-19-99-54-13-B3
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 172.16.1.37
        Subnet Mask . . . . . . . . . . . : 255.255.0.0
        Default Gateway . . . . . . . . . : 172.16.1.200
        DHCP Server . . . . . . . . . . . : 172.16.1.33
        DNS Servers . . . . . . . . . . . : 172.16.1.33
        Primary WINS Server . . . . . . . : 172.16.1.33
        Lease Obtained. . . . . . . . . . : 22 April 2009 11:54:00
        Lease Expires . . . . . . . . . . : 30 April 2009 11:54:00

Thanks to anyone who can help!
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bertster
Asked:
bertster
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1 Solution
 
DanielWillmottCommented:
If you can resolve the address to an IP that just means your workstation can get to the DNS server fine.
However, since you can ping 66.102.9.104, that means you are actually getting to the internet.
The first thing that comes to mind is to check that no Internet Explorer proxy is set up on the problem workstation. (Tools/Internet Options/Connections/LAN Setting - uncheck use proxy server for your LAN)
From what I can tell, your SBS server is 172.16.1.33. Your internet gateway is 172.16.1.200. You can check to see if there is any kind of internet filtering configured on the 172.16.1.200 device.
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bertsterAuthor Commented:
Hi Daniel,

There is no proxy set on lan connections and there is no filtering on the gateway (172.16.1.200).
Thanks
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-Q-Commented:
1. Try installing Mozilla Firefox to see if it's an IE issue.
2. Also test anther protocol ie FTP to see if that PC can get out.
3. Make sure you don't have any anti-virus/software firewall preventing access (disable all to test).

One solution that has worked for me in the past:  http://www.snapfiles.com/get/winsockxpfix.html
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bertsterAuthor Commented:
I've just added another brand new workstation onto the domain and the same problem is happening. No internet connection. It gets it IP address ok from DHCP, but when I try ipconfig /renew I get the error:

An error occurred while renewing interface Local Area Connection : unable to contact your DHCP server. Request has timed out.


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DanielWillmottCommented:
Is the SBS server using the same class B subnet mask? (255.255.0.0)
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chatxfalconCommented:
bertster,

You can verify if your DNS is working..

Follow the steps:

1) Go to Start
2) Click RUN
3) Type: CMD  then press ENTER

at the command promt

4) Type:  ipconfig /flushdns
5) nslookup experts-exchange.com

The reply should be similar to:

     Non-authoritative answer:
     Name:    experts-exchange.com
     Address:  64.156.132.140

If it resolves .. it means your DNS is working... then just follow the advice of Daniel.




I hope this helps.



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bertsterAuthor Commented:
Daniel,

Yes it is using 255.255.0.0

ipconfig /all:
Windows IP Configuration

   Host Name . . . . . . . . . . . . : PEP-SERVER
   Primary Dns Suffix  . . . . . . . : pepcsl.local
   Node Type . . . . . . . . . . . . : Unknown
   IP Routing Enabled. . . . . . . . : Yes
   WINS Proxy Enabled. . . . . . . . : Yes
   DNS Suffix Search List. . . . . . : pepcsl.local

Ethernet adapter Server Local Area Connection:
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Network Connection
   Physical Address. . . . . . . . . : 00-11-11-4B-DB-5E
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 172.16.1.33
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . : 172.16.1.200
   DNS Servers . . . . . . . . . . . : 172.16.1.33
   Primary WINS Server . . . . . . . : 172.16.1.33

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bertsterAuthor Commented:
Chatxfalcon,

Yes nslookup resolves experts-exchange to 64.156.132.140
Seems DNS is ok.
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-Q-Commented:
Can you test Firefox to see if it's an IE problem.
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DanielWillmottCommented:
You could also try a local web (SBS) server - http://companyweb. That should definately work.
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bertsterAuthor Commented:
Daniel,

http://companyweb is not working   (the page connot be found)
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bertsterAuthor Commented:
-Q-

Firefox now installed but is also not working - address not found
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-Q-Commented:
Can you run the following from command prompt and post.
tracert 61.88.88.88
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DanielWillmottCommented:
Can you specify what the firewall (or the device at 172.16.1.200) is?
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DanielWillmottCommented:
And does http://172.16.1.33 bring up a SBS 2003 website?
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bertsterAuthor Commented:
Daniel,

Device 172.16.1.200 is a ZyXel Router P-660HW-T1 v2
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bertsterAuthor Commented:
Daniel,

And does http://172.16.1.33 bring up a SBS 2003 website?  No get page cannot be found.
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bertsterAuthor Commented:
-Q-

Trace results:
Tracing route to 61.88.88.88 over a maximum of 30 hops

  1     1 ms     1 ms     1 ms  172.16.1.200
  2    12 ms    12 ms    13 ms  esr5.faraday2.broadband.bt.net [217.47.45.144]
  3    13 ms    12 ms    13 ms  217.47.45.13
  4    15 ms    14 ms    14 ms  217.47.90.6
  5    14 ms    13 ms    12 ms  217.41.177.1
  6    14 ms    14 ms     *     217.41.177.122
  7    13 ms    13 ms    14 ms  217.41.177.34
  8    13 ms    13 ms    13 ms  217.47.90.49
  9    14 ms    14 ms    13 ms  core1-pos12-6.faraday.ukcore.bt.net [194.72.4.12
9]
 10    13 ms    14 ms    14 ms  core3-pos0-1-1-0.ealing.ukcore.bt.net [62.6.204.
77]
 11    13 ms    13 ms    14 ms  transit2-gig8-0-0.ealing.ukcore.bt.net [62.6.200
.122]
 12    14 ms    14 ms    14 ms  166.49.168.49
 13    15 ms    14 ms    14 ms  so-6-0-0-0.gar1.london1.level3.net [212.113.11.2
53]
 14    18 ms    22 ms    16 ms  ae-32-54.ebr2.london2.level3.net [4.68.117.126]

 15    15 ms    19 ms    17 ms  ae-47-107.ebr2.london2.level3.net [4.69.141.126]

 16   277 ms   273 ms   273 ms  ae-42-42.ebr1.london1.level3.net [4.69.141.193]

 17    87 ms   206 ms   275 ms  ae-100-100.ebr2.london1.level3.net [4.69.141.166
]
 18   102 ms   264 ms   276 ms  ae-81-81.csw3.newyork1.level3.net [4.69.134.74]

 19   349 ms     *      344 ms  ae-84-84.ebr4.newyork1.level3.net [4.69.134.121]

 20    85 ms    90 ms   152 ms  ae-2.ebr4.sanjose1.level3.net [4.69.135.185]
 21   165 ms   160 ms   162 ms  ae-2.ebr4.sanjose1.level3.net [4.69.135.185]
 22   152 ms   164 ms   152 ms  ae-22-79.car2.sanjose1.level3.net [4.68.18.68]
 23   154 ms   152 ms   154 ms  singapore-t.car2.sanjose1.level3.net [4.79.42.23
0]
 24   154 ms   155 ms     *     singapore-t.car2.sanjose1.level3.net [4.79.42.23
0]
 25     *        *        *     Request timed out.
 26  203.208.148.90  reports: Destination net unreachable.

Trace complete.
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DanielWillmottCommented:
So to sum up :
-ipconfig /renew gives a timeout error even through the system already got an IP address from DHCP previously
-you can ping and tracert to an internet IP address but not web browse to it with IE or Firefox - no filtering or proxy involved
-the pc is configured identical to another pc that is working properly
-the pc can't hit http://companyweb (altho that may not be enabled on the SBS server)
Can you ftp to the internet from a command prompt? (i.e. ftp ftp.microsoft.com)
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bertsterAuthor Commented:
Daniel,

Yes your summing up is correct
I CAN ftp from a command prompt   (just connected to ftp.microsoft.com)
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DanielWillmottCommented:
how about:
https://172.16.1.33
and
https://www.amazon.com/ (or any internet https site)
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DanielWillmottCommented:
And what about the software on  the PC:
Antivirus?
Firewall?
"Security" Software?
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bertsterAuthor Commented:
Daniel,

Nope - both fail with page cannot be displayed.

Incidentally the ipconfig /renew now works - it once again sees DHCP server
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bertsterAuthor Commented:
Problem solved!

Rebooted the router and immediately found all workstations could connect. Upon further investigate found out that the router had been previously used as DHCP server, although the option had been switched off a while back. Seems the router had never been rebooted and it was holding onto some routing tables I guess.  Thanks for all your input.
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