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What is the role of msdcs in DNS? RRS feed

Answers

  • To facilitate locating Windows Server 2003-based domain controllers, in
    addition to the standard _Service._Protocol.DnsDomainName format, the Net
    Logon service registers SRV records that identify the well-known server-type
    pseudonyms "dc" (domain controller), gc (global catalog), pdc (primary
    domain controller), and "domains" (globally unique identifier, or GUID) as
    prefixes in the _msdcs subdomain. This Microsoft-specific subdomain enables
    location of domain controllers that have Windows Server 2003-specific roles
    in the domain or forest, as well as the location by GUID when a domain has
    been renamed. To accommodate locating domain controllers by server type or
    by GUID (abbreviated "dctype"), Windows Server 2003-based domain controllers
    register SRV records in the following form:
    _Service._Protocol.DcType._msdcs.DnsDomainName

    The subdomain _msdcs.DnsDomainName is used to find an LDAP server that is
    running TCP and also functioning in a particular Windows Server role. The
    name _msdcsis reserved for locating domain controllers and Kerberos servers.
    The single keyword _msdcswas chosen to avoid cluttering the DNS namespace
    unnecessarily. Other constant, well-known names (pdc, dc, and gc) were kept
    short to avoid exceeding the maximum length allowed for a DNS name.

    --
    I hope that helps

     

     

    Saturday, August 13, 2011 10:25 AM
  • Nicely put. In short, the primary purposes of _msdcs zones (the forest-wide and domain-wide) are to locate AD domain controllers (SRV records) and faciliate their replication (CNAME records).

    More details at http://technet.microsoft.com/en-us/library/cc759550(WS.10).aspx

    hth
    Marcin

    Saturday, August 13, 2011 11:34 AM
  • Msdcs folder which is know as Microsoft domain controller service contains srv records which is used for locating domain controller for their services. It contains generic srv records, ldap records,Kpass records, CNAME etc.

    http://www.windowsitpro.com/article/dns/q-what-s-the-dns-_msdcs-zone-for-the-forest-root-domain-used-for-

    Sukhwin08, its not fair, you should have given Jorge Silva credit for the explanation related to msdcs posted by you. Its my humble request, next time, please appreciate the original author by mentioning his name/articles.

    To facilitate locating Windows Server 2003-based domain controllers, in
    addition to the standard _Service._Protocol.DnsDomainName format, the Net
    Logon service registers SRV records that identify the well-known server-type
    pseudonyms "dc" (domain controller), gc (global catalog), pdc (primary
    domain controller), and "domains" (globally unique identifier, or GUID) as
    prefixes in the _msdcs subdomain. This Microsoft-specific subdomain enables
    location of domain controllers that have Windows Server 2003-specific roles
    in the domain or forest, as well as the location by GUID when a domain has
    been renamed. To accommodate locating domain controllers by server type or
    by GUID (abbreviated "dctype"), Windows Server 2003-based domain controllers
    register SRV records in the following form:
    _Service._Protocol.DcType._msdcs.DnsDomainName

    The subdomain _msdcs.DnsDomainName is used to find an LDAP server that is
    running TCP and also functioning in a particular Windows Server role. The
    name _msdcsis reserved for locating domain controllers and Kerberos servers.
    The single keyword _msdcswas chosen to avoid cluttering the DNS namespace
    unnecessarily. Other constant, well-known names (pdc, dc, and gc) were kept
    short to avoid exceeding the maximum length allowed for a DNS name.

    --
    I hope that helps

    http://www.winvistatips.com/whats-purpose-_msdcs-zone-active-directory-forest-root-zone-t691654.html

     

    Regards


    Awinish Vishwakarma

    MVP-Directory Services

    MY BLOG:  http://awinish.wordpress.com

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

    Saturday, August 13, 2011 5:02 PM
    Moderator

All replies

  • To facilitate locating Windows Server 2003-based domain controllers, in
    addition to the standard _Service._Protocol.DnsDomainName format, the Net
    Logon service registers SRV records that identify the well-known server-type
    pseudonyms "dc" (domain controller), gc (global catalog), pdc (primary
    domain controller), and "domains" (globally unique identifier, or GUID) as
    prefixes in the _msdcs subdomain. This Microsoft-specific subdomain enables
    location of domain controllers that have Windows Server 2003-specific roles
    in the domain or forest, as well as the location by GUID when a domain has
    been renamed. To accommodate locating domain controllers by server type or
    by GUID (abbreviated "dctype"), Windows Server 2003-based domain controllers
    register SRV records in the following form:
    _Service._Protocol.DcType._msdcs.DnsDomainName

    The subdomain _msdcs.DnsDomainName is used to find an LDAP server that is
    running TCP and also functioning in a particular Windows Server role. The
    name _msdcsis reserved for locating domain controllers and Kerberos servers.
    The single keyword _msdcswas chosen to avoid cluttering the DNS namespace
    unnecessarily. Other constant, well-known names (pdc, dc, and gc) were kept
    short to avoid exceeding the maximum length allowed for a DNS name.

    --
    I hope that helps

     

     

    Saturday, August 13, 2011 10:25 AM
  • Nicely put. In short, the primary purposes of _msdcs zones (the forest-wide and domain-wide) are to locate AD domain controllers (SRV records) and faciliate their replication (CNAME records).

    More details at http://technet.microsoft.com/en-us/library/cc759550(WS.10).aspx

    hth
    Marcin

    Saturday, August 13, 2011 11:34 AM
  • Msdcs folder which is know as Microsoft domain controller service contains srv records which is used for locating domain controller for their services. It contains generic srv records, ldap records,Kpass records, CNAME etc.

    http://www.windowsitpro.com/article/dns/q-what-s-the-dns-_msdcs-zone-for-the-forest-root-domain-used-for-

    Sukhwin08, its not fair, you should have given Jorge Silva credit for the explanation related to msdcs posted by you. Its my humble request, next time, please appreciate the original author by mentioning his name/articles.

    To facilitate locating Windows Server 2003-based domain controllers, in
    addition to the standard _Service._Protocol.DnsDomainName format, the Net
    Logon service registers SRV records that identify the well-known server-type
    pseudonyms "dc" (domain controller), gc (global catalog), pdc (primary
    domain controller), and "domains" (globally unique identifier, or GUID) as
    prefixes in the _msdcs subdomain. This Microsoft-specific subdomain enables
    location of domain controllers that have Windows Server 2003-specific roles
    in the domain or forest, as well as the location by GUID when a domain has
    been renamed. To accommodate locating domain controllers by server type or
    by GUID (abbreviated "dctype"), Windows Server 2003-based domain controllers
    register SRV records in the following form:
    _Service._Protocol.DcType._msdcs.DnsDomainName

    The subdomain _msdcs.DnsDomainName is used to find an LDAP server that is
    running TCP and also functioning in a particular Windows Server role. The
    name _msdcsis reserved for locating domain controllers and Kerberos servers.
    The single keyword _msdcswas chosen to avoid cluttering the DNS namespace
    unnecessarily. Other constant, well-known names (pdc, dc, and gc) were kept
    short to avoid exceeding the maximum length allowed for a DNS name.

    --
    I hope that helps

    http://www.winvistatips.com/whats-purpose-_msdcs-zone-active-directory-forest-root-zone-t691654.html

     

    Regards


    Awinish Vishwakarma

    MVP-Directory Services

    MY BLOG:  http://awinish.wordpress.com

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

    Saturday, August 13, 2011 5:02 PM
    Moderator