[Samba] Samba Authentication wrecking my head [ADS]

[Gaiseric Vandal]

What version of samba?  I found that samba 3.0.x (as bundled with 
solaris) had problems with idmap.  This was with LDAP backend, a Samba 
DC with trusts to Windows 2003 domain  (in  NT domain compatibility 
mode.)  Samba would allocate idmap entries in ldap, and would populate 
the TDB cache files.  but when the cache timeout expired, the cache 
files were not repopulated.

Long and short- I don't think Samba 3.0.x plays nice with Windows 
2003.   It doesn't work with Windows 2008 domains (2003 mode.)




On 03/30/2011 10:07 AM, Brian O'Mahony wrote:
> After a bit of googling, I found that the idmap has been corrupted. Why would/could this happen?
>
> -----Original Message-----
> From: samba-bounces at lists.samba.org [mailto:samba-bounces at lists.samba.org] On Behalf Of Brian O'Mahony
> Sent: Wednesday, March 30, 2011 2:37 PM
> To: samba at lists.samba.org
> Subject: [Samba] Samba Authentication wrecking my head [ADS]
>
> 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 ak
>   bartrap 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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