DHCP, DNS Problem, IP coming from wrong DHCP server

Discussion in 'Windows Small Business Server' started by Project_Sega, Jul 20, 2004.

  1. Project_Sega

    Project_Sega Guest


    My head really hurts with this one. I have 2 SBS Sites.

    Site one Server IP address - DHCP running on network

    Site two Server IP address - Static ip addresses on
    network, small site. VPN dial in connections are given out from range and above.

    Both of these sites are connected over a VPN link in ISA server.

    What I'm finding in the last few days though is that the DNS server on
    site one is showing references for, then 202 etc which
    link back to the servername of site one ... which should be

    What then happens is that some of the XP machines then try to resolve
    the servername back to one of the 192.168.0.x addresses which then
    effectivly puts them off the network.

    Removing the entry from the DNS and rebooting the XP machine cures it
    for a few hours or so.

    Ive checked the LAT on site one and all thats in there is the 10.0.0.x

    Any idea where I can go from here?

    Project_Sega, Jul 20, 2004
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  2. Hi,
    This seems to be the issue described on the following KB article:

    292822 Name resolution and connectivity issues on a Routing and Remote

    The changes mentioned there should help avoid the server registering its
    RRAS interface on DNS causing name resolution issues.
    What most likely is happening is that your RRAS server is configured with a
    static pool on the 192.168.0.x (most likely starting in the 200 range)
    network also and it is assigning those IPs to the remove VPN connections.

    In regards to the LAT, I would add the 192.168.0.x remote network if you
    want them to have full access to the resources through that interface.


    Damian N. Leibaschoff, MS IST, MCSE
    Microsoft Corporation

    Get Secure! - www.microsoft.com/security


    When responding to posts, please "Reply to Group" via

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    from your issue.


    This posting is provided "AS IS" with no warranties, and confers no rights.
    Damian N Leibaschoff [MSFT], Jul 20, 2004
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  3. Project_Sega

    Project_Sega Guest

    Many thanks for the pointer Damian. I've just made the changes and
    hopefully this will resolve the issue.

    Project_Sega, Jul 20, 2004
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