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Thread: Incorrect IP address returned from DNS

  1. #1
    Rob Nicholson Guest

    Incorrect IP address returned from DNS

    I've got a home development network at home that consists of:

    o Gandalf: Windows 2003 server acting as domain controller and DNS server
    with static IP address of 192.168.0.2
    o Frodo: Development PC running Windows XP with static IP address of
    192.168.0.4
    o Merry: Windows 2003 server running under VMware workstation with DHCP
    address currently of 192.168.0.105
    o Mordor: Windows XP PC running under VMware workstation with DHCP address
    currently of 192.168.0.101
    o Wireless router acting as DHCP server with IP address 192.168.0.1

    However, when I ping merry from (say) Frodo, it returns the IP address of
    192.168.0.101 which is actually the IP address of Mordor. Conversely, ping
    mordor from Frodo and it returns the IP address of 192.168.0.105 which is
    the IP address of Merry.

    It's basically got very confused :-)

    All the non-DNS systems have their DNS set to 192.168.0.2, 192.168.0.1, i.e.
    use Gandalf the AD DNS server first and if it's offline, use the router
    (which resolves to the internet).

    I must admit I don't know much about how a Windows network sorts out it's
    internal names in DNS when running AD. Does a Windows XP PC say to the DNS
    Server "Hey, here I am and my IP address is XYZ?"

    Is there a way to have a look in the DNS database on the AD server, e.g.
    find what information it's holding for a PC?

    And I guess finally, is there a way to refresh the whole darn lot. I'm going
    to reboot Gandalf (AD server) to see if that helps.

    Thanks, Rob.



  2. #2
    Meinolf Weber Guest

    Re: Incorrect IP address returned from DNS

    Hello Rob,

    In a domain ALL machines has to use the Domain DNS server (and if you run
    DHCP also better use the 2003 DHCP server not the router). Use the router
    only for that what it is made for, routing. If you configure the routers
    ip as DNS on domain members, login to domain, group policy processing, etc.
    will not run correctly. For internet access in the domain configure the FORWARDERS
    tab in the DNS server properties under the DNS management console, add here
    the ip address from your ISP's DNS servers.

    Best regards

    Meinolf Weber
    Disclaimer: This posting is provided "AS IS" with no warranties, and confers
    no rights.
    ** Please do NOT email, only reply to Newsgroups
    ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm

    > I've got a home development network at home that consists of:
    >
    > o Gandalf: Windows 2003 server acting as domain controller and DNS
    > server
    > with static IP address of 192.168.0.2
    > o Frodo: Development PC running Windows XP with static IP address of
    > 192.168.0.4
    > o Merry: Windows 2003 server running under VMware workstation with
    > DHCP
    > address currently of 192.168.0.105
    > o Mordor: Windows XP PC running under VMware workstation with DHCP
    > address
    > currently of 192.168.0.101
    > o Wireless router acting as DHCP server with IP address 192.168.0.1
    > However, when I ping merry from (say) Frodo, it returns the IP address
    > of 192.168.0.101 which is actually the IP address of Mordor.
    > Conversely, ping mordor from Frodo and it returns the IP address of
    > 192.168.0.105 which is the IP address of Merry.
    >
    > It's basically got very confused :-)
    >
    > All the non-DNS systems have their DNS set to 192.168.0.2,
    > 192.168.0.1, i.e. use Gandalf the AD DNS server first and if it's
    > offline, use the router (which resolves to the internet).
    >
    > I must admit I don't know much about how a Windows network sorts out
    > it's internal names in DNS when running AD. Does a Windows XP PC say
    > to the DNS Server "Hey, here I am and my IP address is XYZ?"
    >
    > Is there a way to have a look in the DNS database on the AD server,
    > e.g. find what information it's holding for a PC?
    >
    > And I guess finally, is there a way to refresh the whole darn lot. I'm
    > going to reboot Gandalf (AD server) to see if that helps.
    >
    > Thanks, Rob.
    >




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