[Samba] Samba Authentication wrecking my head [ADS]

[Brian O'Mahony]

Ive recently installed three servers with RHEL5u5. After some messing on the original, I got samba working with ADS authentication. I then went and got it working so that users could log in using their domain name & password to the box. I got this working with both no restriction, and ADS group restriction. I have left it on no restriction wheil I get these systems up and running.

I then copied my configuration files (krb5.conf, samba.conf, system-auth.conf) to the second machine. Everything works.  Rebooted, everything is fine. System running as expected.

I copied to the third machine. Everything worked fine. I was able to log in using two users (mine and a colleagues). Set up some other machine stuff, rebooted, and passed the machine over.

I was then informed (naturally 5mins after I left the office) that there was something wrong. Those two accounts worked from both a samba perspective, and a login perspective. However a third account that was supposed to work, failed with "su: user ccadm does not exist". Now samba doesn't work for any user other than the original too, and the same goes for logins.

I tried net ads leave, kdestory, renaming the system, rebooting. I have rejoined the domain as both that system name, and a new one, with no issues:
[root at akbarTRAP log]# wbinfo -t
checking the trust secret via RPC calls succeeded
[root at akbarTRAP log]# net ads testjoin
Join is OK
[root at akbarTRAP log]# wbinfo -u | grep ccadm
Ccadm

So my questions are:


1.       Where the hell are these accounts being cached, that work.

2.       What the hell has happened to make this no longer work.

3.       Why if I can see all the users & groups can I not log in, or get samba working.

This is really starting to get on my nerves. I just cannot understand why if it can see the users using wbinfo, why it is telling me they don't exist.

Would really appreciate some help on this.

Regards
B



[root at akbarTRAP etc]# cat /etc/nsswitch.conf | grep winbind
passwd:     files winbind
shadow:     files winbind
group:      files winbind

log.winbind:
[2011/03/30 14:29:03,  3] winbindd/winbindd_misc.c:754(winbindd_interface_version)
  [ 7381]: request interface version
[2011/03/30 14:29:03,  3] winbindd/winbindd_misc.c:787(winbindd_priv_pipe_dir)
  [ 7381]: request location of privileged pipe
[2011/03/30 14:29:03,  3] winbindd/winbindd_user.c:438(winbindd_getpwnam)
  [ 7381]: getpwnam ccadm
[2011/03/30 14:29:05,  3] winbindd/winbindd_user.c:438(winbindd_getpwnam)
  [ 7381]: getpwnam ccadm
[2011/03/30 14:29:05,  3] winbindd/winbindd_misc.c:754(winbindd_interface_version)
  [ 7381]: request interface version
[2011/03/30 14:29:05,  3] winbindd/winbindd_misc.c:787(winbindd_priv_pipe_dir)
  [ 7381]: request location of privileged pipe
[2011/03/30 14:29:05,  3] winbindd/winbindd_pam.c:829(winbindd_pam_auth)
  [ 7381]: pam auth ccadm
[2011/03/30 14:29:05,  3] winbindd/winbindd_user.c:438(winbindd_getpwnam)
  [ 7381]: getpwnam ccadm

Secure log:
Mar 30 14:29:03 akbartrap sshd[7381]: Invalid user ccadm from 172.16.165.248
Mar 30 14:29:03 akbartrap sshd[7382]: input_userauth_request: invalid user ccadm
Mar 30 14:29:05 akbartrap sshd[7381]: pam_unix(sshd:auth): check pass; user unknown
Mar 30 14:29:05 akbartrap sshd[7381]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=galvatron.MYDOMAIN.com
Mar 30 14:29:05 akbartrap sshd[7381]: pam_winbind(sshd:auth): getting password (0x00000010)
Mar 30 14:29:05 akbartrap sshd[7381]: pam_winbind(sshd:auth): pam_get_item returned a password
Mar 30 14:29:05 akbartrap sshd[7381]: pam_winbind(sshd:auth): request wbcLogonUser failed: WBC_ERR_AUTH_ERROR, PAM error: PAM_AUTH_ERR (7), NTSTATUS: NT_STATUS_WRONG_PASSWORD, Error message was: Wrong Password [I know the pass is right here. It works elsewhere]
Mar 30 14:29:05 akbartrap sshd[7381]: pam_winbind(sshd:auth): user 'ccadm' denied access (incorrect password or invalid membership)
Mar 30 14:29:05 akbartrap sshd[7381]: pam_succeed_if(sshd:auth): error retrieving information about user ccadm
Mar 30 14:29:07 akbartrap sshd[7381]: Failed password for invalid user ccadm from 172.16.165.248 port 39699 ssh2


# Global parameters
[global]
        workgroup = GROUP
        realm = MYDOMAIN.COM
        security = ads
        idmap uid = 10000-20000
        idmap gid = 10000-20000
        winbind use default domain = Yes
        winbind separator = /
        encrypt passwords = Yes
        log level = 3
        log file = /var/log/samba/log.%m
        max log size = 50
        socket options = TCP_NODELAY SO_RCVBUF=16384 SO_SNDBUF=16384
        preferred master = No
        dns proxy = No
        wins server = 172.16.164.100
        template homedir = /home/%U
        template shell = /bin/bash

auth        required      pam_env.so
auth        sufficient    pam_unix.so nullok try_first_pass
auth        sufficient    pam_winbind.so use_first_pass
auth        requisite     pam_succeed_if.so uid >= 500 quiet
auth        required      pam_deny.so

account     required      pam_unix.so
account     sufficient    pam_succeed_if.so uid < 500 quiet
account     sufficient    pam_winbind.so use_first_pass
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    pam_winbind.so use_first_pass
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     required      pam_winbind.so use_first_pass
session     required      pam_mkhomedir.so


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