+ Post New Thread
Results 1 to 10 of 10
Windows 7 Thread, NIC issue? in Technical; Got a couple of machines, gone a bit mad: Can ping IP of DC Cannot ping hostname of DC Cannot ...
  1. #1
    SovietRussia's Avatar
    Join Date
    Mar 2013
    Location
    Powys, Wales
    Posts
    708
    Thank Post
    77
    Thanked 159 Times in 124 Posts
    Rep Power
    49

    Angry NIC issue?

    Got a couple of machines, gone a bit mad:


    • Can ping IP of DC
    • Cannot ping hostname of DC
    • Cannot do nslookup of anything
    • Cannot even browse the internet on them (IE - proxy server is not responding)


    And because it cannot resolve the DC hostname, it isn't getting Group Policy updates etc. What is even weirder:


    • Can connect via SMB to the DC using its hostname, and authenticate...


    What is going on?! Could it be the NIC of the machines?

  2. #2

    Join Date
    Feb 2009
    Location
    South Wales
    Posts
    41
    Thank Post
    2
    Thanked 6 Times in 5 Posts
    Rep Power
    13
    I had a similar issue with our laptops that was down to MS's DirectAccess not working properly, the laptops thought they were off the corp domain and so tried to use the IPHTTPS tunnel for DNS lookups and would fail.
    We could ping by IP but not by hostname. That however wouldn't explain why you can connect via SMB and authenticate though (we couldn't do that, if we tried browsing via hostname via SMB, it would bring an Offline Files cached version up)


    Do you use MS DirectAccess at all? If you put your servers in the HOSTS file, can you ping them then? (we could, but still couldn't GPUPDATE)
    I would say probably not a hardware issue, maybe something wrong with DNS on the machines?

  3. #3
    SovietRussia's Avatar
    Join Date
    Mar 2013
    Location
    Powys, Wales
    Posts
    708
    Thank Post
    77
    Thanked 159 Times in 124 Posts
    Rep Power
    49
    I popped the servers into the hosts file, and it refused to return them, so its like skipping the hosts file which is bizzare!

    I did ipconfig /displaydns and the entries in the hosts file show there, so I have no idea!

    No not using DirectAccess.

  4. #4


    Join Date
    Dec 2005
    Location
    In the server room, with the lead pipe.
    Posts
    4,715
    Thank Post
    288
    Thanked 789 Times in 616 Posts
    Rep Power
    226
    If the Windows firewall is on, where does it think it is? Domain network, home/work network or public network?

  5. #5
    SovietRussia's Avatar
    Join Date
    Mar 2013
    Location
    Powys, Wales
    Posts
    708
    Thank Post
    77
    Thanked 159 Times in 124 Posts
    Rep Power
    49
    No firewall is disabled across the network

  6. #6

    SYNACK's Avatar
    Join Date
    Oct 2007
    Posts
    11,271
    Thank Post
    884
    Thanked 2,749 Times in 2,322 Posts
    Blog Entries
    11
    Rep Power
    785
    Quote Originally Posted by SovietRussia View Post
    No firewall is disabled across the network
    Eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeep !

    But one problem at a time, it just sounds like DNS is squiffy, can you ping your DNS server and see if dhcp is setting it as a DNS server, if nslookup is working this is probably a DNS fail. SMB shares may still be running by name thanks to windows falling back to NetBIOS or something similar.

  7. #7

    3s-gtech's Avatar
    Join Date
    Mar 2009
    Location
    Wales
    Posts
    3,104
    Thank Post
    161
    Thanked 655 Times in 588 Posts
    Rep Power
    169
    It's my network, so I'll take responsibility for that decision. It has been off for over eight years now, but yes I am aware that it's a bad idea! In testing to re-enable it, we just found it to be a real dog. It's well secured otherwise, but we know!

    DNS centrally is working nicely. This is on a few isolated workstations. Once reimaged, they're fine so we'll nuke them today.

  8. #8

    Join Date
    Mar 2010
    Posts
    224
    Thank Post
    34
    Thanked 39 Times in 35 Posts
    Rep Power
    17
    Is the time off on them?

  9. #9

    3s-gtech's Avatar
    Join Date
    Mar 2009
    Location
    Wales
    Posts
    3,104
    Thank Post
    161
    Thanked 655 Times in 588 Posts
    Rep Power
    169
    Nope. It honestly looks as if some networking components of the OS are stuffed. It's very odd. I suspect it's not a coincidence that I pushed out an upgrade to AB TC v7 through the tutor program at the time they went south - but who knows how that happened.

  10. #10
    MordyT's Avatar
    Join Date
    Sep 2012
    Location
    In a computer
    Posts
    506
    Thank Post
    44
    Thanked 75 Times in 70 Posts
    Rep Power
    22
    Try a cmd... Netsh winsock reset and a reboot



SHARE:
+ Post New Thread

Similar Threads

  1. NIC Teaming DNS Role Issue
    By Liam in forum Windows Server 2008 R2
    Replies: 2
    Last Post: 14th April 2011, 12:02 PM
  2. Replies: 0
    Last Post: 24th March 2011, 10:31 AM
  3. NIC Issue
    By p858snake in forum Wireless Networks
    Replies: 0
    Last Post: 17th August 2010, 03:06 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •