Hello,
I am having a small issue with LDAP, and I hope someone here might be able to provide a few tips.
I am unable to authenticate as user 'testuser' on server 'storage' and the following errors appear in /var/log/messages on server 'storage'
Sep 19 16:56:17 storage sshd(pam_unix)[3124]: check pass; user unknown Sep 19 16:56:17 storage sshd(pam_unix)[3124]: authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=test-kja1 Sep 19 16:56:17 storage sshd[3124]: pam_ldap: error trying to bind as user "uid=testuser,ou=People,dc=example,dc=local" (Invalid credentials)
I am also unable to issue this command:
# passwd testuser passwd: Unknown user name 'testuser'.
but this command works fine:
# finger testuser Login: testuser Name: Test User Directory: /home/testuser Shell: /bin/bash Never logged in. No mail. No Plan.
The server 'storage' is the LDAP host server, and there are about 9 other servers configured to use 'storage' to authenticate users. All 9 of them allow 'testuser' to login and also for him to change his password.
Issuing this command:
# ldapsearch -x -b 'uid=testuser,ou=People,dc=example,dc=local' '(objectclass=*)'
# extended LDIF # # LDAPv3 # base <uid=testuser,ou=People,dc=example,dc=local> with scope sub # filter: (objectclass=*) # requesting: ALL #
# testuser, People, example.local dn: uid=testuser,ou=People,dc=example,dc=local uid: testuser cn: Sean Cook objectClass: account objectClass: posixAccount objectClass: top objectClass: shadowAccount shadowMax: 99999 shadowWarning: 7 loginShell: /bin/bash uidNumber: 547 gidNumber: 500 homeDirectory: /home/testuser
# search result search: 2 result: 0 Success
# numResponses: 2 # numEntries: 1
I think the issue might be with PAM, because comparing all files I can think of doesnt point me to any differences except /etc/pam.d/ system-auth
The LDAP server 'storage' has WINBIND turned on, as follows:
auth required /lib/security/$ISA/pam_env.so auth sufficient /lib/security/$ISA/pam_unix.so likeauth nullok auth sufficient /lib/security/$ISA/pam_ldap.so use_first_pass auth sufficient /lib/security/$ISA/pam_winbind.so use_first_pass auth required /lib/security/$ISA/pam_deny.so
account required /lib/security/$ISA/pam_unix.so broken_shadow account sufficient /lib/security/$ISA/pam_succeed_if.so uid < 100 quiet account [default=bad success=ok user_unknown=ignore] /lib/ security/$ISA/pam_ldap.so account [default=bad success=ok user_unknown=ignore] /lib/ security/$ISA/pam_winbind.so account required /lib/security/$ISA/pam_permit.so
password requisite /lib/security/$ISA/pam_cracklib.so retry=3 password sufficient /lib/security/$ISA/pam_unix.so nullok use_authtok md5 shadow password sufficient /lib/security/$ISA/pam_ldap.so use_authtok password sufficient /lib/security/$ISA/pam_winbind.so use_authtok password required /lib/security/$ISA/pam_deny.so
session required /lib/security/$ISA/pam_limits.so session required /lib/security/$ISA/pam_unix.so session optional /lib/security/$ISA/pam_ldap.so
And the server 'phoenix' (which allows 'testuser' to login fine) does not;
# User changes will be destroyed the next time authconfig is run. auth required /lib/security/$ISA/pam_env.so auth sufficient /lib/security/$ISA/pam_unix.so likeauth nullok auth sufficient /lib/security/$ISA/pam_ldap.so use_first_pass auth required /lib/security/$ISA/pam_deny.so
account required /lib/security/$ISA/pam_unix.so broken_shadow account sufficient /lib/security/$ISA/pam_succeed_if.so uid < 100 quiet account [default=bad success=ok user_unknown=ignore] /lib/ security/$ISA/pam_ldap.so account required /lib/security/$ISA/pam_permit.so
password requisite /lib/security/$ISA/pam_cracklib.so retry=3 password sufficient /lib/security/$ISA/pam_unix.so nullok use_authtok md5 shadow password sufficient /lib/security/$ISA/pam_ldap.so use_authtok password required /lib/security/$ISA/pam_deny.so
session required /lib/security/$ISA/pam_limits.so session required /lib/security/$ISA/pam_unix.so session optional /lib/security/$ISA/pam_ldap.so
I tried disabling WINBIND but the issue still occurs even after restarting ldap and sshd.
Please help!!