DNS - Reverse lookup configuration

Discussion in 'Server Networking' started by david, Jul 16, 2009.

  1. david

    david Guest

    SBS Server 2003 configuration question.

    Reverse lookup of the local subnet from my workstation to my server fails.
    I assume that this is because there is no ptr record in the reverse lookup
    zone?

    I've got lots of records in the forward lookup zone: the DHCP service
    updates DNS records.

    Can I, should I, configure something differently so that I automatically get
    reverse lookup records as well?
    The reverse lookup subnet is "Active Directory Integrated", and Dynamic
    updates is set to "None".

    (david)
     
    david, Jul 16, 2009
    #1
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  2. david

    Chris Dent Guest

    Hi David,

    It's just that dynamic update option. Change that to Secure Only and it
    will start populating as well.

    HTH

    Chris
     
    Chris Dent, Jul 16, 2009
    #2
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  3. I know I'm not answering your question, however.

    From your Previous post it sounds like you have TWO DHCP Servers?
    I would Disable the VOIP one let SBS do the DHCP
    and manage the IP's From their
    Put the Phones on STATIC IPS in a High Range say 192.168.16.200-250
    You may not want to put phones in a static IP , but I would probably and
    stick a label on the bottom of them.

    If you don't understand what I'm saying
    Please post exactly the IP range everything is, where is the DHCP etc etc
    (IPCONFIG /ALL of the server and PC would be good.)

    Sounds like some clean up needs to be done before we clean up things.. ???

    Russ
    --
    Russell Grover - SBITS.Biz [SBS-MVP]
    Microsoft Gold Certified Partner
    Microsoft Certified Small Business Specialist
    World Wide 24hr SBS Remote Support - http://www.SBITS.Biz
    Microsoft Online Services - http://www.microsoft-online-services.com/
     
    Russ Grover [SBS-MVP], Jul 16, 2009
    #3
  4. And David
    Since this is a SBS Server, you really need to post this in the SBS group
    (So we don't have to bother the other guys :)

    Russ

    --
    Russell Grover - SBITS.Biz [SBS-MVP]
    Microsoft Gold Certified Partner
    Microsoft Certified Small Business Specialist
    World Wide 24hr SBS Remote Support - http://www.SBITS.Biz
    Microsoft Online Services - http://www.microsoft-online-services.com/
     
    Russ Grover [SBS-MVP], Jul 16, 2009
    #4
  5. david

    david Guest

    I don't have any control over the VOIP network or the hardware -- I just
    try to clean up the Windows Server.

    I think that some of the DHCP questions are left over from a 'test'
    VOIP configuration, but I can't/won't change things I don't understand
    -- and the fury that comes down on a sys admin who crashes the
    server is nothing to the fury that would descend on me if I crashed the
    phone system.

    (david)
     
    david, Jul 17, 2009
    #5
  6. david

    david Guest

    thanx,
    (david)

     
    david, Jul 17, 2009
    #6
  7. (roll eyes)

    OK..

    --
    Russell Grover - SBITS.Biz [SBS-MVP]
    Microsoft Gold Certified Partner
    Microsoft Certified Small Business Specialist
    World Wide 24hr SBS Remote Support - http://www.SBITS.Biz
    Microsoft Online Services - http://www.microsoft-online-services.com/



     
    Russ Grover [SBS-MVP], Jul 17, 2009
    #7
  8. If there are two DHCP servers, and one is updating DNS, and the other is
    not, then I can understand why you do not have the necessary PTR record in
    your reverse zone. As long as it remains this way, well, it will remain this
    way.

    I think you're worried about what your manager/boss will say, but you
    apparently know there's an issue. Have you compiled a report for your
    manager with your findings, along with recommendations to fix the problem? I
    mean in any environment, there should be some sort of communication channel
    that allows administrators who find problems to report such, as well as make
    recommendations without getting their heads bitten off. If not, it would
    appear to be a challenging environment to work in.

    --
    Ace

    This posting is provided "AS-IS" with no warranties or guarantees and
    confers no rights.

    Please reply back to the newsgroup or forum to benefit from collaboration
    among responding engineers, and to help others benefit from your resolution.

    Ace Fekay, MCT, MCSE, MCSA 2003 & 2000, MCSA Messaging
    Microsoft Certified Trainer

    http://twitter.com/acefekay

    For urgent issues, you may want to contact Microsoft PSS directly. Please
    check http://support.microsoft.com for regional support phone numbers.
     
    Ace Fekay [MCT], Jul 17, 2009
    #8
  9. david

    david Guest

    OK, I've enabled secure updates of the reverse lookup zone.
    This seems to be working, and when I do NSLookup the server
    now knows what it's name is.

    There are still a lot of things missing from the forward zone,
    (windows 98 and linux workstations) so I'm waiting until
    some DHCP leases expire to see if that helps.

    There are also a few unexplaned values in there. I've turned
    on scavenging, but that hasn't had any effect yet.

    (david)
     
    david, Jul 20, 2009
    #9

  10. David,

    Waiting for scavenging won't register them. To get machines that can't register themselves such as Win9x machines, and Linux machines that are not configured with the zone name that you want to register into, simply set DHCP Option 081 (the DNS tab in DHCP Properties), to register everything that can't register themselves (the bottom button).

    Make sure that in DHCP Option 006, that the DNS servers are only the internal ones. No external, no ISP, etc.

    Ace
     
    Ace Fekay [MCT], Jul 20, 2009
    #10
  11. david

    david Guest

    The scavanging is to get rid of some old reverse lookup values.
    That takes a while to get started.

    Regarding the forward zone, I've tried discarding a lease,
    and forcing the workstation to renew. I get a new lease,
    the activity is recorded in the DHCP log, but nothing shows
    up in DNS.

    Is there anyway to debug the conversation between the
    DHCP and the DNS? I've started a new thread to ask that question.

    (david)


    David,

    Waiting for scavenging won't register them. To get machines that can't
    register themselves such as Win9x machines, and Linux machines that are not
    configured with the zone name that you want to register into, simply set
    DHCP Option 081 (the DNS tab in DHCP Properties), to register everything
    that can't register themselves (the bottom button).

    Make sure that in DHCP Option 006, that the DNS servers are only the
    internal ones. No external, no ISP, etc.

    Ace
     
    david, Jul 22, 2009
    #11

  12. Network packet sniffer.

    I'll look for your other thread and will respond if I can help.

    Ace
     
    Ace Fekay [MCT], Jul 22, 2009
    #12
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