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!!
--
Von Landfried | System Administrator
Eye Street Software Corporation
1-888-252-2085 x 3052
von.landfried@xxxxxxxxxxxxx
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