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Thread: Duplicate PTR records in reverse lookup zone

  1. #1
    TSAM Guest

    Duplicate PTR records in reverse lookup zone

    Hello,

    We run Windows 2003 domain with AD integrated DNS. We run DHCP server for
    our clients.

    We get duplicate entries for dynamic updated clients in the reverse lookup
    zone. Our DHCP server settings is as follows:

    1. Enable DNS dynamic updates according to the settings below:
    2. Always dynamically update DNS A and PTR reecords
    3.Discard A and PTR records when lease is deleted
    4.Dynamically update DNS A and PTR records for DHCP clients ..... NT4.0
    .....

    Our forward lookup zones don't have any duplicates. How could I avoid
    duplicate PTR records in our reverse lookup zone for DHCP subnet.

    TIA

  2. #2
    Meinolf Weber Guest

    Re: Duplicate PTR records in reverse lookup zone

    Hello TSAM,

    Check out this one for updating DNS:
    http://technet.microsoft.com/en-us/l.../cc787034.aspx

    Or you can also configure aging/scavenging on the zone properties general
    tab.

    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


    > Hello,
    >
    > We run Windows 2003 domain with AD integrated DNS. We run DHCP server
    > for our clients.
    >
    > We get duplicate entries for dynamic updated clients in the reverse
    > lookup zone. Our DHCP server settings is as follows:
    >
    > 1. Enable DNS dynamic updates according to the settings below:
    > 2. Always dynamically update DNS A and PTR reecords
    > 3.Discard A and PTR records when lease is deleted
    > 4.Dynamically update DNS A and PTR records for DHCP clients .....
    > NT4.0
    > ....
    > Our forward lookup zones don't have any duplicates. How could I avoid
    > duplicate PTR records in our reverse lookup zone for DHCP subnet.
    >
    > TIA
    >




  3. #3
    TSAM Guest

    Re: Duplicate PTR records in reverse lookup zone

    Thanks.

    I never been a fan nor I trusted scavenging to be honest. But why are we
    seeing duplicate PTR's in reverse lookup zone and how to eliminate this
    without using scavenging?

    TIA

    "Meinolf Weber" wrote:

    > Hello TSAM,
    >
    > Check out this one for updating DNS:
    > http://technet.microsoft.com/en-us/l.../cc787034.aspx
    >
    > Or you can also configure aging/scavenging on the zone properties general
    > tab.
    >
    > 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
    >
    >
    > > Hello,
    > >
    > > We run Windows 2003 domain with AD integrated DNS. We run DHCP server
    > > for our clients.
    > >
    > > We get duplicate entries for dynamic updated clients in the reverse
    > > lookup zone. Our DHCP server settings is as follows:
    > >
    > > 1. Enable DNS dynamic updates according to the settings below:
    > > 2. Always dynamically update DNS A and PTR reecords
    > > 3.Discard A and PTR records when lease is deleted
    > > 4.Dynamically update DNS A and PTR records for DHCP clients .....
    > > NT4.0
    > > ....
    > > Our forward lookup zones don't have any duplicates. How could I avoid
    > > duplicate PTR records in our reverse lookup zone for DHCP subnet.
    > >
    > > TIA
    > >

    >
    >
    >


  4. #4
    Meinolf Weber Guest

    Re: Duplicate PTR records in reverse lookup zone

    Hello TSAM,

    If a user press power off button the client can not correctly unregister
    itself for example.

    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


    > Thanks.
    >
    > I never been a fan nor I trusted scavenging to be honest. But why are
    > we seeing duplicate PTR's in reverse lookup zone and how to eliminate
    > this without using scavenging?
    >
    > TIA
    >
    > "Meinolf Weber" wrote:
    >
    >> Hello TSAM,
    >>
    >> Check out this one for updating DNS:
    >> http://technet.microsoft.com/en-us/l.../cc787034.aspx
    >> Or you can also configure aging/scavenging on the zone properties
    >> general tab.
    >>
    >> 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
    >>> Hello,
    >>>
    >>> We run Windows 2003 domain with AD integrated DNS. We run DHCP
    >>> server for our clients.
    >>>
    >>> We get duplicate entries for dynamic updated clients in the reverse
    >>> lookup zone. Our DHCP server settings is as follows:
    >>>
    >>> 1. Enable DNS dynamic updates according to the settings below:
    >>> 2. Always dynamically update DNS A and PTR reecords
    >>> 3.Discard A and PTR records when lease is deleted
    >>> 4.Dynamically update DNS A and PTR records for DHCP clients .....
    >>> NT4.0
    >>> ....
    >>> Our forward lookup zones don't have any duplicates. How could I
    >>> avoid
    >>> duplicate PTR records in our reverse lookup zone for DHCP subnet.
    >>> TIA
    >>>




  5. #5
    A, Deji Guest

    Re: Duplicate PTR records in reverse lookup zone

    Well, you better start loving scavenging because it is designed to do
    exactly what you are looking to do.

    Deji
    "TSAM" <TSAM@discussions.microsoft.com> wrote in message
    news:A7A3B918-46AF-43D7-B13F-E1A3418A4FE0@microsoft.com...
    > Thanks.
    >
    > I never been a fan nor I trusted scavenging to be honest. But why are we
    > seeing duplicate PTR's in reverse lookup zone and how to eliminate this
    > without using scavenging?
    >
    > TIA
    >
    > "Meinolf Weber" wrote:
    >
    >> Hello TSAM,
    >>
    >> Check out this one for updating DNS:
    >> http://technet.microsoft.com/en-us/l.../cc787034.aspx
    >>
    >> Or you can also configure aging/scavenging on the zone properties general
    >> tab.
    >>
    >> 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
    >>
    >>
    >> > Hello,
    >> >
    >> > We run Windows 2003 domain with AD integrated DNS. We run DHCP server
    >> > for our clients.
    >> >
    >> > We get duplicate entries for dynamic updated clients in the reverse
    >> > lookup zone. Our DHCP server settings is as follows:
    >> >
    >> > 1. Enable DNS dynamic updates according to the settings below:
    >> > 2. Always dynamically update DNS A and PTR reecords
    >> > 3.Discard A and PTR records when lease is deleted
    >> > 4.Dynamically update DNS A and PTR records for DHCP clients .....
    >> > NT4.0
    >> > ....
    >> > Our forward lookup zones don't have any duplicates. How could I avoid
    >> > duplicate PTR records in our reverse lookup zone for DHCP subnet.
    >> >
    >> > TIA
    >> >

    >>
    >>
    >>



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