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Re: User Auth with PAM and LDAP

Hi Thomas,

>>>>> "Thomas" == thomas emde <thomas.emde@scaleon.de> writes:

    Thomas> I have stored my user accounts in an LDAP database and for
    Thomas> some reason there are still some users in /etc/passwd.

    Thomas> Now I would like to let both types of users have access to
    Thomas> certain linux boxes via ssh.  In my /etc/pam.d/sshd I have
    Thomas> the following lines:

    Thomas> auth     sufficient     /lib/security/pam_ldap.so
    Thomas> auth     required       /lib/security/pam_unix.so       # set_secrpc
    Thomas> auth     required       /lib/security/pam_nologin.so
    Thomas> auth     required       /lib/security/pam_env.so
    Thomas> auth     required       /lib/security/pam_mail.so
    Thomas> account  sufficient     /lib/security/pam_ldap.so
    Thomas> account  required       /lib/security/pam_unix.so
    Thomas> [...]

    Thomas> This way it works fine, but additionally I would like to
    Thomas> restrict the access of users only to certain hosts using
    Thomas> the "host" attribute in ldap where the accessible hosts
    Thomas> are listed. But with the above configuration this won't
    Thomas> work, the user can access any host, even if not listed in
    Thomas> the ldap database (yes I use "pam_check_host_attr=yes" in
    Thomas> my ldap configuration). If I change the "auth sufficient
    Thomas> /lib/security/pam_ldap.so" into "auth required...", the
    Thomas> host attribute is checked but now the "/etc/passwd"-users
    Thomas> cannot login at all.

    Thomas> Any ideas or hints are greatly appreciated...

Strange, isn't it?  I posted a long message about this a couple of
weeks ago.  It is archived at:


I'd be interested in hearing your opinion of my message and Sam's

By the way, I think you probably want the miscellaneous auth modules
(pam_nologin, pam_env, pam_mail) to be listed before any sufficient
modules (such as pam_ldap).

peace & happiness,

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