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Windows Server 2008 R2 Thread, Servers Can't Resolve Own Hostnames or Network in Technical; ok nslookup C:\Users\administrator.DOMAIN>nslookup Default Server: UnKnown Address: x.x.128.251 > mailserver Server: UnKnown Address: x.x.128.251 *** UnKnown can't find mailserver: No ...
  1. #16

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    ok nslookup

    C:\Users\administrator.DOMAIN>nslookup
    Default Server: UnKnown
    Address: x.x.128.251

    > mailserver
    Server: UnKnown
    Address: x.x.128.251

    *** UnKnown can't find mailserver: No response from server
    > domaincontroller
    Server: UnKnown
    Address: x.x.128.251

    *** UnKnown can't find domaincontroller: No response from server
    >

    I've made a few changes to save erm, embarisment lol. The ip x.x.128.251 is the ip for domaincontroller (thats the new secondary server, its using the same name and ip as the dc that crashed)

    Using telnet

    Connecting To x.x.128.251...Could not open connection to the host, on port 53.
    The requested service provider could not be loaded or initialized.

    Windows Firewall on both DCs are turned off...

  2. #17

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    1. Can you move TCP/IP from the NIC adapter and resinstall, re-IP and then test?
    2. Can you see if IPv6 is enabled or disabled?
    3. Can you update the NIC drivers if they aren't running the latest drivers?

  3. #18

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    Bare with me sukh, I will have to do that locally. IPv6 is disabled. It's disabled across the entire network. Saying that if you ping the mailserver from the win2k8 dc it shows an ipv6 address rather than ipv4 which is very very odd...

  4. #19

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    I've removed ipv4 and reinstalled it on the mailserver with no change to the issue.

  5. #20

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    Removing the NIC from device manager and re-adding is also an option, this would reset everything to do with the NIC itself.

  6. Thanks to Achandler from:

    neilherbertuk (3rd August 2012)

  7. #21

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    I'll give that ago too achandler. Again will have to do it locally will let you know if it changes anything.

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    Can you use the windows 2003 DC as the primary instead of the 2008 if it has DNS too?

  9. #23

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    I've uninstalled and reinstalled the NIC and it seems to be able to ping itself and any hostname I throw at it. We will see what happens after a reboot.

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    Setting the primary dns to the 2003 server (x.x.128.252) didn't make a difference.

  11. #25

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    Quote Originally Posted by neilherbertuk View Post
    I've uninstalled and reinstalled the NIC and it seems to be able to ping itself and any hostname I throw at it. We will see what happens after a reboot.
    So is it working?

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    Excellent news, hopefully it will be fine after your reboot to.

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    It seems to have worked. It's rebooted and the Exchange Management console will now load. Before it just came up with an initalisation error. All the services related to exchange seem to have started too. I've just loaded up my outlook and it works too Thank you so much for your advice and help. Uninstalling and Reinstalling on the mailserver did the trick and reset everything ip related. Need to try this on the sql server now.

  14. Thanks to neilherbertuk from:

    mac_shinobi (3rd August 2012)

  15. #28

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    Thanks for the feedback

  16. Thanks to mac_shinobi from:

    neilherbertuk (3rd August 2012)

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    Ok a quick update. Thank you for everyones help and all the suggestions. I've just attemped the NIC uninstall and re-install on the sqlserver to find that didn't correct the problem.

    Just before I did this on the mailserver I ran a command mac_shinobi suggested to me in a PM netsh winsock reset catalog but hadn't checked if it had worked as it said to reboot.

    I've just run the command on our sqlserver to find instantly that it could ping any hostname!

  18. Thanks to neilherbertuk from:

    mac_shinobi (3rd August 2012)

  19. #30

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    As a quick note... you followed this KB if you are not using IPv6? How to disable IP version 6 (IPv6) or its specific components in Windows 7, in Windows Vista, in Windows Server 2008 R2, and in Windows Server 2008

    Just unticking the box does next to nothing.

  20. Thanks to Ric_ from:

    mac_shinobi (3rd August 2012)

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