Ldap – How to test a LDAP connection from a client

ldappam-ldap

How to check the LDAP connection from a client to server. I'm working on the LDAP authentication and this client desktop needs to authenticate via a LDAP server. I can SSH to the LDAP server using LDAP user but When in desktop login prompt, I can't login. It says Authentication failure.

Client machine has Cent OS 6.3 and LDAP server has Cent OS 5.5

LDAP software is Openldap.

LDAP servers logs doesn't even show any messages.

So, how to test whether the client can successfully connect to LDAP or not.

Best Answer

Use ldapsearch. It will return an error if you cannot query the LDAP Server.

The syntax for using ldapsearch:

ldapsearch -x -LLL -h [host] -D [user] -w [password] -b [base DN] -s sub "([filter])" [attribute list]

A simple example

$ ldapsearch -x -LLL -h host.example.com -D user -w password -b"dc=ad,dc=example,dc=com" -s sub "(objectClass=user)" givenName

Please see this link: http://randomerror.wordpress.com/2009/10/16/quick-tip-how-to-search-in-windows-active-directory-from-linux-with-ldapsearch/

Edit: It seems you don't have pam configured corectlly for gdm/xdm here is an example how to do it: http://pastebin.com/TDK4KWRV

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