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Problem with pam_ldap




I am currently using OpenLDAP for authentication and seems I’m having some troubles explaining PAM what it should be doing. I get this error when trying to login with an ldap user trough ssh:


Apr  8 16:38:16 rh01 sshd[11045]: debug1: userauth-request for user myuser service ssh-connection method password

Apr  8 16:38:16 rh01 sshd[11045]: debug1: attempt 1 failures 1

Apr  8 16:38:17 rh01 sshd[11044]: pam_unix(sshd:auth): check pass; user unknown

Apr  8 16:38:17 rh01 sshd[11044]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=rh01.localdomain

Apr  8 16:38:17 rh01 sshd[11044]: pam_succeed_if(sshd:auth): error retrieving information about user myuser

Apr  8 16:38:19 rh01 sshd[11044]: debug1: PAM: password authentication failed for an illegal user: User not known to the underlying authentication module

Apr  8 16:38:19 rh01 sshd[11044]: Failed password for invalid user myuser from port 42064 ssh2


So it seems he just doesn’t recognize the user (stored in LDAP directory). I had this working before but then I made some changes to try to make the pam files more readable and now they never got back to working … :)


Here is my system-auth file in /etc/pam.d


# This file is auto-generated.

# User changes will be destroyed the next time authconfig is run.

auth        required      pam_env.so

auth        sufficient    pam_unix.so nullok try_first_pass

auth        requisite     pam_succeed_if.so uid >= 500 quiet

auth        sufficient    /lib/security/pam_ldap.so use_first_pass

auth        required      pam_deny.so


account     required      pam_unix.so broken_shadow

account     sufficient    pam_localuser.so

account     sufficient    pam_succeed_if.so uid < 500 quiet

account     [default=bad success=ok user_unknown=ignore] /lib/security/pam_ldap.so

account     required      pam_permit.so


password    requisite     pam_cracklib.so try_first_pass retry=3

password    sufficient    pam_unix.so md5 shadow nullok try_first_pass use_authtok

password    sufficient    /lib/security/pam_ldap.so use_authtok

password    required      pam_deny.so


session     optional      pam_keyinit.so revoke

session     required      pam_limits.so

session     [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid

session     required      pam_unix.so

session     optional      /lib/security/pam_ldap.so


And here is sshd file in the same directory


auth       sufficient      /lib/security/pam_ldap.so

auth       include      system-auth

account    sufficient      /lib/security/pam_ldap.so

account    required     pam_nologin.so

account    include      system-auth

password   required        /lib/security/pam_ldap.so

password   include      system-auth


session    sufficient      /lib/security/pam_ldap.so


password    sufficient    pam_unix.so ssha shadow nullok try_first_pass use_authtok



session    optional     pam_keyinit.so force revoke

session    include      system-auth

session    required     pam_loginuid.so


As part of the “file clean-up” I was only using the “include” directives but since it stopped working I reverted back to explicitly telling what module to use… still doesn’t work though. Can anyone see why SSH doesn’t even try to authenticate against the OpenLDAP directory?


Thank you,



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