+ Post New Thread
Results 1 to 11 of 11
Windows Thread, Disappearing gateway in Technical; We have a strange problem with gateway settings disappearing from machine. * Checking the network adapter settings in Windows show ...
  1. #1

    Join Date
    Nov 2008
    Posts
    137
    Thank Post
    6
    Thanked 3 Times in 2 Posts
    Rep Power
    12

    Exclamation Disappearing gateway

    We have a strange problem with gateway settings disappearing from machine.

    * Checking the network adapter settings in Windows show the gateway correctly
    * Running ipconfig shows no gateway listed.
    * Setting the adapter to DHCP then back again resolves it
    * A reboot causes it to re-occur
    * We are running on a server 2003 domain
    * Our gateway device is a school guardian

    We have run the following registry hack to try and resolve it, however so far unsuccesfully.

    Code:
    Windows Registry Editor Version 5.00
    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
    
    "ForwardBroadcasts"=dword:00000000
    "IPEnableRouter"=dword:00000000
    "DeadGWDetectDefault"=dword:00000000
    "UseDomainNameDevolution"=dword:00000001
    "EnableICMPRedirect"=dword:00000001
    "DontAddDefaultGatewayDefault"=dword:00000000
    "EnableSecurityFilters"=dword:00000000
    "EnableDeadGWDetect"=dword:00000000
    PC's appear to be running generally slowly when the gateway setting is missing.

    Has anyone come across this, and if so how did you resolve it.

    Cheers

    Iain

  2. #2

    Michael's Avatar
    Join Date
    Dec 2005
    Location
    Birmingham
    Posts
    9,262
    Thank Post
    242
    Thanked 1,568 Times in 1,250 Posts
    Rep Power
    340
    On Windows Server 2003, open up DHCP Server > right click 'Scope Options' > 'Configure Options'. Tick 003 Router, then enter the required IP. On a Class C network, this would typically be 192.168.1.1 for example.

    From a command prompt enter 'ipconfig /renew' and your IP, Subnet and Gateway should now be displayed correctly.

    If you have more than one DHCP server in a domain, they must be setup the same, otherwise this could create a load of problems similar to what you're describing.

  3. Thanks to Michael from:

    imunro01 (9th July 2010)

  4. #3

    Join Date
    Nov 2008
    Posts
    137
    Thank Post
    6
    Thanked 3 Times in 2 Posts
    Rep Power
    12
    Thanks for the suggestion on that. That option is already set on obth our DHCP servers.

    What would be causing it to happen on machines configured with a static IP?

  5. #4

    Michael's Avatar
    Join Date
    Dec 2005
    Location
    Birmingham
    Posts
    9,262
    Thank Post
    242
    Thanked 1,568 Times in 1,250 Posts
    Rep Power
    340
    It's very interesting that the IP shows up in Windows but not the command prompt. That doesn't make sense for a start. Are all the workstations from the same image? Have you tried updating the drivers for your network adapters?

    Try rebuilding the tcp/ip stack as follows

  6. #5

    Join Date
    Nov 2008
    Posts
    137
    Thank Post
    6
    Thanked 3 Times in 2 Posts
    Rep Power
    12
    The machines have various different types of hardware, and whilst most are built from a single sysprep image, with the relevant drivers installed afterwards, this is not exclusively the case.

    I have tried the drivers without much success.

  7. #6

    Michael's Avatar
    Join Date
    Dec 2005
    Location
    Birmingham
    Posts
    9,262
    Thank Post
    242
    Thanked 1,568 Times in 1,250 Posts
    Rep Power
    340
    Have you tried rebuilding the tcp/ip stack?

  8. #7

    Join Date
    Nov 2008
    Posts
    137
    Thank Post
    6
    Thanked 3 Times in 2 Posts
    Rep Power
    12
    Yes - we've tried that, and it made no difference.

  9. #8

    Michael's Avatar
    Join Date
    Dec 2005
    Location
    Birmingham
    Posts
    9,262
    Thank Post
    242
    Thanked 1,568 Times in 1,250 Posts
    Rep Power
    340
    If you install Windows from new, join it to the domain and then configure a static IP is the problem still there?

  10. #9

    Join Date
    Nov 2008
    Posts
    137
    Thank Post
    6
    Thanked 3 Times in 2 Posts
    Rep Power
    12
    A bit of investigation shows that it only appears when the PC is in certain OU's in Active Directory, suggesting it could be a GP problem, however I'm no further enlightened as to what policy is causing it.

  11. #10

    Michael's Avatar
    Join Date
    Dec 2005
    Location
    Birmingham
    Posts
    9,262
    Thank Post
    242
    Thanked 1,568 Times in 1,250 Posts
    Rep Power
    340
    If you havenít done so already, install GPMC on your server. It will give you detailed information what policies are being applied.

    From what youíre saying Iím speculating that a policy is set within either:

    Computer Config > Admin Templates > Network > DNS Client or

    User Config > Admin Templates > Network > Network Connections

  12. #11

    Join Date
    May 2008
    Posts
    60
    Thank Post
    1
    Thanked 7 Times in 7 Posts
    Rep Power
    23
    use the MMC resultant set of policy snapin on the station with the problem to determine the GPO's being applied.

    The RSoP tool is invaluable in terms of sorting out what is actually happening at the station. You can see if there are any errors or conflicts, but most importantly you can see the winning GPO that is being applied and what values are being set.

SHARE:
+ Post New Thread

Similar Threads

  1. Replies: 0
    Last Post: 17th June 2009, 02:19 PM
  2. Server Disappearing
    By gibbo_ap in forum Windows Server 2008
    Replies: 7
    Last Post: 25th March 2009, 08:08 AM
  3. Printers disappearing!
    By storkyIV in forum Windows Server 2000/2003
    Replies: 12
    Last Post: 25th February 2009, 08:44 AM
  4. activstudio pe 3 keep disappearing
    By sta-helpdesk in forum Educational Software
    Replies: 4
    Last Post: 5th January 2009, 11:34 AM
  5. Disappearing Folders
    By secman in forum Windows
    Replies: 9
    Last Post: 2nd March 2006, 04:34 PM

Thread Information

Users Browsing this Thread

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

Tags for this Thread

Posting Permissions

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