Re: Password synchronisation beetween openldap and AD 2008 R2

Dan Lavu <dan@xxxxxxxx> · Thu, 16 Jan 2014 14:43:27 -0500



    1. The Windows DCs will be the master of the passwords.  Users will
    need to change their passwords in that environment.

    
    Not true, the password synchronization is based upon certain
    attributes in the database. 389 will only sync to AD if the ntuser
    objectClass is available, and AD, it's posixAccount? iirc. 

    
    2. It must be installed on all DCs as you never know which DC the
    Windows client will send the change to.

    
    Nope, it's a single point of failure, it must be installed onto
    *ONE* DC otherwise they will be overwriting each other. 

    
    3. Right that is a limitation, but there are bad workarounds for it.
    You can modify and create a pointer from SamAccountname to UID in
    the AD schema, but the UID will be UID in 389, does your application
    point to AD or 389?

    
    As Petr stated, I do suggest looking at IdM/IPA as an alternative
    solution because it contains the compat tree for legacy applications
    and RHEL7/Fedora it currently supports a trust which will then
    negate having AD users change their passwords. Just make sure you
    have fully redundant IPA and AD servers so authentication will not
    break. 

    
    Dan

    
    On 01/16/2014 12:08 PM, Gary Algier
      wrote:

    
      On 01/16/14 11:07, Louis-Marie Plumel
        wrote:

      
            My environment is 99 % under linux and authentication
              is full LDAP.

            
            For some 30 workstations under windows, i had to create an
            AD under 2008 R2. For some reasons, i have to synchronize
            password beetween LDAP and AD. Linux users will keep
            authentication on LDAP. (windows users are on LDAP AND AD,
            and if they want to change their password, they have to do
            this on LDAP. That's why i want to synchronise their
            password beetween LDAP and AD).

          
          LM

          
      I installed the Windows password sync from the 389DS project on
      our DCs and it works with the Sun/Solaris/Java directory server
      just fine.  It should work with any LDAP server.

      
      However:

      1. The Windows DCs will be the master of the passwords.  Users
      will need to change their passwords in that environment.

      2. It must be installed on all DCs as you never know which DC the
      Windows client will send the change to.

      3. You may need to adjust the parameters of the module by editing
      the registry after installation.  The default attributes did not
      suit our needs.  We use the UID attribute for the LDAP equivalent
      of the Windows SamAccountName attribute.

      
          2014/1/16 Petr Spacek <pspacek@xxxxxxxxxx>

            
              On 16.1.2014 16:55, Louis-Marie Plumel
                wrote:

              
                   Ok ok, i'm going to see what you sent
                  to me . To be sure, is  389DS may be an

                  intermediate between my two actual servers?

                  
                  Not sure what you mean here.

                  
                 Is my actual LDAP can be used by 389DS?
                  I'm sorry for these requests i'm

                  novice in this domain....

                
              Could you describe what are you trying to achieve?

              
              What is the use case? Logging to workstations? To web
              apps? File sharing over NFS with centralized identity
              store? What else?

              
              Petr^2 Spacek
              
                
                    2014/1/16 Rich Megginson <rmeggins@xxxxxxxxxx>

                    
                        On 01/16/2014 08:12 AM, Louis-Marie Plumel
                      wrote:

                      
                        Ok ok, i'm going to see what you sent to me . To
                      be sure, is  389DS may

                      be an intermediate between my two actual servers?

                      
                      Not sure what you mean here.

                      
                        I have to keep my actual LDAP and remain the
                      master and synchronization must

                      be a single direction (LDAP -> AD).

                      
                      389 supports one way sync.

                      
                        Will users have to change their password?

                      
                      Yes, unfortunately.

                      
                        My goal is that everything will be transparent.

                      
                      Then you may want to look into IPA with AD cross
                      domain trust as Petr

                      suggested.

                      
                         regards

                      
                      2014/1/16 Petr Spacek <pspacek@xxxxxxxxxx>

                      
                       On 16.1.2014 15:59,
                        Rich Megginson wrote:

                        
                         On 01/16/2014 07:57
                          AM, Louis-Marie Plumel wrote:

                          
                           Hello,

                            
                            Actually , i work with openldap.

                            I've installed an AD 2008 R2.My challenge is
                            to work with both and

                            synchronise LDAP and AD 2008 R2. After a
                            long research on the web, i

                            don't

                            find any information about howto synchronise
                            passwords . That's why i

                            come

                            here to see if with 389 DS it's possible or
                            not.

                            
                          Yes.

                          
                          https://access.redhat.com/site/documentation/en-US/Red_Hat_Directory_Server/9.0/html/Administration_Guide/Windows_Sync.html

                          
                          There is also one completely different option:
                        Use trust between AD and

                        Unix domain. It depends on your requirements ...

                        
                        See

                        http://www.freeipa.org/page/Trusts

                        
                        or join mailing list

                        https://www.redhat.com/mailman/listinfo/freeipa-users

                      
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          Louis-Marie Plumel

          louismarie.plumel@xxxxxxxxx

          
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