How can I find out which server hosts LDAP on my windows domain

Question

I am trying develop an application  C   to query an LDAP server  I don t know the actual server named to query - is there a way to find out using standard windows tools or something in  net    I ve also heard rumors that having the server name  ldap   server   is not always needed as long as I ve got dc domain dc com in my query string  but I ve so far been able to work with it this way   Any tips   Thanks

User · Accepted Answer

If you re using AD you can use serverless binding to locate a domain controller for the default domain  then use LDAP   rootDSE to get information about the directory server  as described in the linked article

User · Answer

If the machine you are on is part of the AD domain  it should have its name servers set to the AD name servers  or hopefully use a DNS server path that will eventually resolve your AD domains    Using your example of dc domain dc com  if you look up domain com in the AD name servers it will return a list of the IPs of each AD Controller   Example from my company  w  the domain name changed  but otherwise it s a real example         mokey 0  home jj33   nslookup example ad     Server          172 16 2 10     Address         172 16 2 10 53      Non-authoritative answer      Name    example ad     Address  172 16 6 2     Name    example ad     Address  172 16 141 160     Name    example ad     Address  172 16 7 9     Name    example ad     Address  172 19 1 14     Name    example ad     Address  172 19 1 3     Name    example ad     Address  172 19 1 11     Name    example ad     Address  172 16 3 2   Note I m actually making the query from a non-AD machine  but our unix name servers know to send queries for our AD domain  example ad  over to the AD DNS servers   I m sure there s a super-slick windowsy way to do this  but I like using the DNS method when I need to find the LDAP servers from a non-windows server

User · Answer

AD registers Service Location  SRV  resource records in its DNS server which you can query to get the port and the hostname of the responsible LDAP server in your domain   Just try this on the command-line   C   gt  nslookup   gt  set types all  gt   ldap  tcp  lt  lt your AD domain gt  gt   ldap  tcp  lt  lt your AD domain gt  gt   SRV service location        priority         0       weight           100       port             389       svr hostname      lt  lt ldap hostname gt  gt   lt  lt your AD domain gt  gt     provided that your nameserver is the AD nameserver which should be the case for the AD to function properly   Please see Active Directory SRV Records and Windows 2000 DNS white paper  for more information

[asp.net] How can I find out which server hosts LDAP on my windows domain?

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