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Thread: Duplicate name exists in the network- Where?

  1. #1
    Orvs Guest

    Duplicate name exists in the network- Where?

    I have Win2000 AD on my Environment.

    I have configured a new CNAME record on my DNS and to point it to a host
    called hosts.abc.org (win2003).

    I can resolves the new CName perfectly.

    However when I do \\cname.abc.org it gives me an error..
    "you were not connected because of a duplicate name exists on the network"

    I can do \\hosts.abc.org no problems but not on the alias.. As far as I know
    I never use that name before.

    How can I fix this??

    thank you

    Where it is???






  2. #2
    BerkHolz, Steven Guest

    Re: Duplicate name exists in the network- Where?

    I believe that there is a fix for this, but do not have it handy.

    By default UNC only works with the hosts netbios name or IP address.
    It is a security feature imposed by the remote host.

    The server is seeing your request for cname and saying "That's not me, I'm hosts".

    I believe that there is a setting on the remote host that turns off this checking.

    cnames work fine for anything except CIFS (SMB) file sharing.

    --
    --
    Steven

    http://www.glimasoutheast.org



    "Orvs" <Orvs@discussions.microsoft.com> wrote in message news:634E0F71-C926-47FF-992C-B53A75657E14@microsoft.com...
    >I have Win2000 AD on my Environment.
    >
    > I have configured a new CNAME record on my DNS and to point it to a host
    > called hosts.abc.org (win2003).
    >
    > I can resolves the new CName perfectly.
    >
    > However when I do \\cname.abc.org it gives me an error..
    > "you were not connected because of a duplicate name exists on the network"
    >
    > I can do \\hosts.abc.org no problems but not on the alias.. As far as I know
    > I never use that name before.
    >
    > How can I fix this??
    >
    > thank you
    >
    > Where it is???
    >
    >
    >
    >
    >




  3. #3
    Herb Martin Guest

    Re: Duplicate name exists in the network- Where?


    "BerkHolz, Steven" <spamtrap@Astrumtech.com> wrote in message
    news:Oih0aFvPHHA.4424@TK2MSFTNGP06.phx.gbl...
    >I believe that there is a fix for this, but do not have it handy.
    >
    > By default UNC only works with the hosts netbios name or IP address.
    > It is a security feature imposed by the remote host.


    UNC names can (generally) works with DNS style names or even IP
    addresses (as of NT4+ with IP loaded) but there are problems for
    building multiple (CNAME style) alias different from the machines
    ordinary name + domain name, for accessing Shares etc.

    There is a fix for this -- it's a registry entry IIRC.

    > The server is seeing your request for cname and saying "That's not me, I'm
    > hosts".
    > I believe that there is a setting on the remote host that turns off this
    > checking.
    > cnames work fine for anything except CIFS (SMB) file sharing.


    The problem is not DNS names per se, but multiple names for shares etc.

    net view \\Server.Domain.Com

    ....will generally works if this is the machines true name.

    --
    Herb Martin, MCSE, MVP
    http://www.LearnQuick.Com
    (phone on web site)



  4. #4
    Orvs Guest

    Re: Duplicate name exists in the network- Where?

    H HErb can you please send me the workaround or the steps I need to do?

    It is more clearer now..
    "Herb Martin" wrote:

    >
    > "BerkHolz, Steven" <spamtrap@Astrumtech.com> wrote in message
    > news:Oih0aFvPHHA.4424@TK2MSFTNGP06.phx.gbl...
    > >I believe that there is a fix for this, but do not have it handy.
    > >
    > > By default UNC only works with the hosts netbios name or IP address.
    > > It is a security feature imposed by the remote host.

    >
    > UNC names can (generally) works with DNS style names or even IP
    > addresses (as of NT4+ with IP loaded) but there are problems for
    > building multiple (CNAME style) alias different from the machines
    > ordinary name + domain name, for accessing Shares etc.
    >
    > There is a fix for this -- it's a registry entry IIRC.
    >
    > > The server is seeing your request for cname and saying "That's not me, I'm
    > > hosts".
    > > I believe that there is a setting on the remote host that turns off this
    > > checking.
    > > cnames work fine for anything except CIFS (SMB) file sharing.

    >
    > The problem is not DNS names per se, but multiple names for shares etc.
    >
    > net view \\Server.Domain.Com
    >
    > ....will generally works if this is the machines true name.
    >
    > --
    > Herb Martin, MCSE, MVP
    > http://www.LearnQuick.Com
    > (phone on web site)
    >
    >
    >


  5. #5
    Jorge Silva Guest

    Re: Duplicate name exists in the network- Where?

    Hi
    Read
    Connecting to SMB share on a Windows 2000-based computer or a Windows Server
    2003-based computer may not work with an alias name
    http://support.microsoft.com/kb/281308


    --

    I hope that the information above helps you.
    Have a Nice day.
    Jorge Silva
    MCSE

    "Orvs" <Orvs@discussions.microsoft.com> wrote in message
    news:87996B4F-B26D-43B2-A407-B2D033461784@microsoft.com...
    >H HErb can you please send me the workaround or the steps I need to do?
    >
    > It is more clearer now..
    > "Herb Martin" wrote:
    >
    >>
    >> "BerkHolz, Steven" <spamtrap@Astrumtech.com> wrote in message
    >> news:Oih0aFvPHHA.4424@TK2MSFTNGP06.phx.gbl...
    >> >I believe that there is a fix for this, but do not have it handy.
    >> >
    >> > By default UNC only works with the hosts netbios name or IP address.
    >> > It is a security feature imposed by the remote host.

    >>
    >> UNC names can (generally) works with DNS style names or even IP
    >> addresses (as of NT4+ with IP loaded) but there are problems for
    >> building multiple (CNAME style) alias different from the machines
    >> ordinary name + domain name, for accessing Shares etc.
    >>
    >> There is a fix for this -- it's a registry entry IIRC.
    >>
    >> > The server is seeing your request for cname and saying "That's not me,
    >> > I'm
    >> > hosts".
    >> > I believe that there is a setting on the remote host that turns off
    >> > this
    >> > checking.
    >> > cnames work fine for anything except CIFS (SMB) file sharing.

    >>
    >> The problem is not DNS names per se, but multiple names for shares etc.
    >>
    >> net view \\Server.Domain.Com
    >>
    >> ....will generally works if this is the machines true name.
    >>
    >> --
    >> Herb Martin, MCSE, MVP
    >> http://www.LearnQuick.Com
    >> (phone on web site)
    >>
    >>
    >>



  6. #6
    Orvs Guest

    Re: Duplicate name exists in the network- Where?

    Jorge Hi!!

    Thanks! But I tried and apply the registry set and still same, except when I
    tried the \\aliasname.domin.com on the actual server itselt it works! but not
    from any other machines


    any other ideas?


    "Jorge Silva" wrote:

    > Hi
    > Read
    > Connecting to SMB share on a Windows 2000-based computer or a Windows Server
    > 2003-based computer may not work with an alias name
    > http://support.microsoft.com/kb/281308
    >
    >
    > --
    >
    > I hope that the information above helps you.
    > Have a Nice day.
    > Jorge Silva
    > MCSE
    >
    > "Orvs" <Orvs@discussions.microsoft.com> wrote in message
    > news:87996B4F-B26D-43B2-A407-B2D033461784@microsoft.com...
    > >H HErb can you please send me the workaround or the steps I need to do?
    > >
    > > It is more clearer now..
    > > "Herb Martin" wrote:
    > >
    > >>
    > >> "BerkHolz, Steven" <spamtrap@Astrumtech.com> wrote in message
    > >> news:Oih0aFvPHHA.4424@TK2MSFTNGP06.phx.gbl...
    > >> >I believe that there is a fix for this, but do not have it handy.
    > >> >
    > >> > By default UNC only works with the hosts netbios name or IP address.
    > >> > It is a security feature imposed by the remote host.
    > >>
    > >> UNC names can (generally) works with DNS style names or even IP
    > >> addresses (as of NT4+ with IP loaded) but there are problems for
    > >> building multiple (CNAME style) alias different from the machines
    > >> ordinary name + domain name, for accessing Shares etc.
    > >>
    > >> There is a fix for this -- it's a registry entry IIRC.
    > >>
    > >> > The server is seeing your request for cname and saying "That's not me,
    > >> > I'm
    > >> > hosts".
    > >> > I believe that there is a setting on the remote host that turns off
    > >> > this
    > >> > checking.
    > >> > cnames work fine for anything except CIFS (SMB) file sharing.
    > >>
    > >> The problem is not DNS names per se, but multiple names for shares etc.
    > >>
    > >> net view \\Server.Domain.Com
    > >>
    > >> ....will generally works if this is the machines true name.
    > >>
    > >> --
    > >> Herb Martin, MCSE, MVP
    > >> http://www.LearnQuick.Com
    > >> (phone on web site)
    > >>
    > >>
    > >>

    >


  7. #7
    Jorge Silva Guest

    Re: Duplicate name exists in the network- Where?

    If I'm not mistaken here it goes:

    (DisableStrictNameChecking to 1)

    Second:
    set on a DC:
    SetSpn -A HOST/<ALIAS> <Hostname>
    SetSpn -A HOST/<ALIAS>.<Domain>.<ext> <Hostname>


    --

    I hope that the information above helps you.
    Have a Nice day.
    Jorge Silva
    MCSE

    "Orvs" <Orvs@discussions.microsoft.com> wrote in message
    news:4A5D4555-2D14-4AEC-8289-8173BF24C85A@microsoft.com...
    > Jorge Hi!!
    >
    > Thanks! But I tried and apply the registry set and still same, except when
    > I
    > tried the \\aliasname.domin.com on the actual server itselt it works! but
    > not
    > from any other machines
    >
    >
    > any other ideas?
    >
    >
    > "Jorge Silva" wrote:
    >
    >> Hi
    >> Read
    >> Connecting to SMB share on a Windows 2000-based computer or a Windows
    >> Server
    >> 2003-based computer may not work with an alias name
    >> http://support.microsoft.com/kb/281308
    >>
    >>
    >> --
    >>
    >> I hope that the information above helps you.
    >> Have a Nice day.
    >> Jorge Silva
    >> MCSE
    >>
    >> "Orvs" <Orvs@discussions.microsoft.com> wrote in message
    >> news:87996B4F-B26D-43B2-A407-B2D033461784@microsoft.com...
    >> >H HErb can you please send me the workaround or the steps I need to do?
    >> >
    >> > It is more clearer now..
    >> > "Herb Martin" wrote:
    >> >
    >> >>
    >> >> "BerkHolz, Steven" <spamtrap@Astrumtech.com> wrote in message
    >> >> news:Oih0aFvPHHA.4424@TK2MSFTNGP06.phx.gbl...
    >> >> >I believe that there is a fix for this, but do not have it handy.
    >> >> >
    >> >> > By default UNC only works with the hosts netbios name or IP address.
    >> >> > It is a security feature imposed by the remote host.
    >> >>
    >> >> UNC names can (generally) works with DNS style names or even IP
    >> >> addresses (as of NT4+ with IP loaded) but there are problems for
    >> >> building multiple (CNAME style) alias different from the machines
    >> >> ordinary name + domain name, for accessing Shares etc.
    >> >>
    >> >> There is a fix for this -- it's a registry entry IIRC.
    >> >>
    >> >> > The server is seeing your request for cname and saying "That's not
    >> >> > me,
    >> >> > I'm
    >> >> > hosts".
    >> >> > I believe that there is a setting on the remote host that turns off
    >> >> > this
    >> >> > checking.
    >> >> > cnames work fine for anything except CIFS (SMB) file sharing.
    >> >>
    >> >> The problem is not DNS names per se, but multiple names for shares
    >> >> etc.
    >> >>
    >> >> net view \\Server.Domain.Com
    >> >>
    >> >> ....will generally works if this is the machines true name.
    >> >>
    >> >> --
    >> >> Herb Martin, MCSE, MVP
    >> >> http://www.LearnQuick.Com
    >> >> (phone on web site)
    >> >>
    >> >>
    >> >>

    >>



  8. #8
    Joe Richards [MVP] Guest

    Re: Duplicate name exists in the network- Where?

    Assuming this is a member server, disabling strict name checking and
    then rebooting should make it work fine as long as name resolution is
    working and there is no funky routing rules/acls. I would recommend
    getting a network trace to validate what is happening.


    --
    Joe Richards Microsoft MVP Windows Server Directory Services
    Author of O'Reilly Active Directory Third Edition
    www.joeware.net


    ---O'Reilly Active Directory Third Edition now available---

    http://www.joeware.net/win/ad3e.htm


    Orvs wrote:
    > Jorge Hi!!
    >
    > Thanks! But I tried and apply the registry set and still same, except when I
    > tried the \\aliasname.domin.com on the actual server itselt it works! but not
    > from any other machines
    >
    >
    > any other ideas?
    >
    >
    > "Jorge Silva" wrote:
    >
    >> Hi
    >> Read
    >> Connecting to SMB share on a Windows 2000-based computer or a Windows Server
    >> 2003-based computer may not work with an alias name
    >> http://support.microsoft.com/kb/281308
    >>
    >>
    >> --
    >>
    >> I hope that the information above helps you.
    >> Have a Nice day.
    >> Jorge Silva
    >> MCSE
    >>
    >> "Orvs" <Orvs@discussions.microsoft.com> wrote in message
    >> news:87996B4F-B26D-43B2-A407-B2D033461784@microsoft.com...
    >>> H HErb can you please send me the workaround or the steps I need to do?
    >>>
    >>> It is more clearer now..
    >>> "Herb Martin" wrote:
    >>>
    >>>> "BerkHolz, Steven" <spamtrap@Astrumtech.com> wrote in message
    >>>> news:Oih0aFvPHHA.4424@TK2MSFTNGP06.phx.gbl...
    >>>>> I believe that there is a fix for this, but do not have it handy.
    >>>>>
    >>>>> By default UNC only works with the hosts netbios name or IP address.
    >>>>> It is a security feature imposed by the remote host.
    >>>> UNC names can (generally) works with DNS style names or even IP
    >>>> addresses (as of NT4+ with IP loaded) but there are problems for
    >>>> building multiple (CNAME style) alias different from the machines
    >>>> ordinary name + domain name, for accessing Shares etc.
    >>>>
    >>>> There is a fix for this -- it's a registry entry IIRC.
    >>>>
    >>>>> The server is seeing your request for cname and saying "That's not me,
    >>>>> I'm
    >>>>> hosts".
    >>>>> I believe that there is a setting on the remote host that turns off
    >>>>> this
    >>>>> checking.
    >>>>> cnames work fine for anything except CIFS (SMB) file sharing.
    >>>> The problem is not DNS names per se, but multiple names for shares etc.
    >>>>
    >>>> net view \\Server.Domain.Com
    >>>>
    >>>> ....will generally works if this is the machines true name.
    >>>>
    >>>> --
    >>>> Herb Martin, MCSE, MVP
    >>>> http://www.LearnQuick.Com
    >>>> (phone on web site)
    >>>>
    >>>>
    >>>>


  9. #9
    Joe Richards [MVP] Guest

    Re: Duplicate name exists in the network- Where?

    You really shouldn't have to set SPNs for this.

    --
    Joe Richards Microsoft MVP Windows Server Directory Services
    Author of O'Reilly Active Directory Third Edition
    www.joeware.net


    ---O'Reilly Active Directory Third Edition now available---

    http://www.joeware.net/win/ad3e.htm


    Jorge Silva wrote:
    > If I'm not mistaken here it goes:
    >
    > (DisableStrictNameChecking to 1)
    >
    > Second:
    > set on a DC:
    > SetSpn -A HOST/<ALIAS> <Hostname>
    > SetSpn -A HOST/<ALIAS>.<Domain>.<ext> <Hostname>
    >
    >


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