Question

Accessing Samba shares using winbind to authenticate to Active Directory on OpenSolaris 11

Asked by: spcomputing

Purpose:
I have an OpenSolaris 11 server running Samba version 3.034. We need to be able to access the samba shares on this server with Active Directory users and groups.

Progress thus far:
Successfully joined the server to the domain using Winbind. I can populate AD users and groups on the Solaris server using wbinfo -u and -g. I can also authenticate AD users from the terminal using kinit.

Problem:
When i try to access a samba share from windows, I receive the error:

"The account is not authorized to log in from this station" It does not ask me for credentials, so I assume it is passing my AD credentials from Windows.

If I try to log on to the server with an AD account, it says access denied. If I try too many times, it will lock the account on the domain. So this leads me to believe that the credentials are being passed to the domain controller, but they are not being understood correctly. The error logs have been uninformative, but I will include what I can find. I will also include config files below.

Thank you in advance for your assistance.

==smb.conf==
 
[global]
	log file = /var/samba/log/log.%m
	load printers = yes
	idmap gid = 10000-20000
	allow trusted domains = no
	winbind trusted domains only = yes
	encrypt passwords = yes
	winbind use default domain = yes
	realm = DOMAIN.NET
	passdb backend = smbpasswd
	dns proxy = no 
	netbios name = SERVER01
	idmap uid = 10000-20000
	winbind enum users = no
	winbind nested groups = yes
	unix password sync = yes
	workgroup = DOMAIN
	winbind enum groups = yes
	server signing = yes
	os level = 20
	security = ads
	max log size = 50
	winbind separator = +
 
[data]
	browseable = yes
	writable = yes
	writeable = yes
	write list = admingroup
	path = /data
	comment = 
	valid users = user1,@admingroup
	available = yes
 
 
==pam.conf==
 
login	auth requisite		pam_authtok_get.so.1
login	auth required		pam_dhkeys.so.1
login	auth required		pam_unix_cred.so.1
login	auth required		pam_unix_auth.so.1
login	auth required		pam_dial_auth.so.1
login 	auth sufficient		/usr/lib/security/pam_winbind.so.1 try_first_pass
#
# rlogin service (explicit because of pam_rhost_auth)
#
rlogin	auth sufficient		pam_rhosts_auth.so.1
rlogin	auth requisite		pam_authtok_get.so.1
rlogin	auth required		pam_dhkeys.so.1
rlogin	auth required		pam_unix_cred.so.1
rlogin	auth required		pam_unix_auth.so.1
rlogin 	auth sufficient		/usr/lib/security/pam_winbind.so.1 try_first_pass
#
# Kerberized rlogin service
#
krlogin	auth required		pam_unix_cred.so.1
krlogin	auth required		pam_krb5.so.1
#
# rsh service (explicit because of pam_rhost_auth,
# and pam_unix_auth for meaningful pam_setcred)
#
rsh	auth sufficient		pam_rhosts_auth.so.1
rsh	auth required		pam_unix_cred.so.1
#
# Kerberized rsh service
#
krsh	auth required		pam_unix_cred.so.1
krsh	auth required		pam_krb5.so.1
#
# Kerberized telnet service
#
ktelnet	auth required		pam_unix_cred.so.1
ktelnet	auth required		pam_krb5.so.1
#
# PPP service (explicit because of pam_dial_auth)
#
ppp	auth requisite		pam_authtok_get.so.1
ppp	auth required		pam_dhkeys.so.1
ppp	auth required		pam_unix_cred.so.1
ppp	auth required		pam_unix_auth.so.1
ppp	auth required		pam_dial_auth.so.1
#
# Default definitions for Authentication management
# Used when service name is not explicitly mentioned for authentication
#
other	auth requisite		pam_authtok_get.so.1
other	auth required		pam_dhkeys.so.1
other	auth required		pam_unix_cred.so.1
other	auth required		pam_unix_auth.so.1
other 	auth sufficient		/usr/lib/security/pam_winbind.so.1 try_first_pass
#
# passwd command (explicit because of a different authentication module)
#
passwd	auth required		pam_passwd_auth.so.1
#
# cron service (explicit because of non-usage of pam_roles.so.1)
#
cron	account required	pam_unix_account.so.1
#
# cups service (explicit because of non-usage of pam_roles.so.1)
#
cups	account	required	pam_unix_account.so.1
#
# Default definition for Account management
# Used when service name is not explicitly mentioned for account management
#
other	account requisite	pam_roles.so.1
other 	account sufficient	/usr/lib/security/pam_winbind.so.1 try_first_pass
#
# Default definition for Session management
# Used when service name is not explicitly mentioned for session management
#
other	session required	pam_unix_session.so.1
other 	session sufficient	/usr/lib/security/pam_winbind.so.1 try_first_pass
 
 
==nsswitch.conf==
 
passwd:     files winbind
group:      files winbind
hosts:      dns files ldap
ipnodes:    files dns ldap
networks:   files
protocols:  files winbind
rpc:        files
ethers:     files
netmasks:   files
bootparams: files
publickey:  files
# At present there isn't a 'files' backend for netgroup;  the system will 
#   figure it out pretty quickly, and won't use netgroups at all.
netgroup:   files winbind
automount:  files winbind
aliases:    files
services:   files winbind
printers:	user files
 
auth_attr:  files
prof_attr:  files
project:    files
 
tnrhtp:     files
tnrhdb:     files
 
==krb5.conf==
 
[libdefaults]
        default_realm = DOMAIN.NET
	dns_lookup_realm = true
	dns_lookup_kdc = true
 
[realms]
#        ___default_realm___ = {
#                kdc = ___master_kdc___
#                kdc = ___slave_kdc1___
#                kdc = ___slave_kdc2___
#                kdc = ___slave_kdcN___
#                admin_server = ___master_kdc___
#        }
 
[domain_realm]
	domain.net = DOMAIN.NET
	.domain.net = DOMAIN.NET

                                  
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Asked On
2009-07-31 at 08:29:10ID24617035
Tags

OpenSolaris

,

Solaris

,

LDAP

,

Winbind

,

Samba

,

Kerberos

,

Active Directory

Topics

Sun Solaris

,

Samba File Server

,

Lightweight Directory Access Protocol (LDAP)

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Answers

 

by: it4sohoPosted on 2009-08-03 at 09:05:40ID: 25005687

OK, you've described 2 different errors:
 1) Inability to browse samba files from an AD account on a Windows client
 2) Inability to login to a Solaris system with an AD account

I believe that the two errors are unrelated.... and both trace to either permissions or configuration behavior.

1) You've said that wbinfo -u and wbinfo -g show valid results, which shows that you've joined the domain and are correctly getting data from the AD server -- so the issue appears to be one of permissions on the Solaris system.

Your share folder is /data -- please ensure that world execute permission is ON for the root folder, and that both read & execute permissions are enabled for all users on the /data folder:

   # the output below CAPITALIZES the permissions we CARE about -- you will NOT see CAPITAL letters!
   ls -al /
   drwxrwx--X  20 root root 4096 Mon dd HH:MM .
   drwxrwx--X  20 root root 4096 Mon dd HH:MM ..
   ...don't care
   dRwXRwXRwX  20 user group 4096 Mon dd HH:MM data
   ...don't care

NOTE: I don't care about write permission on /data because it IS valid to have a read-only share! PROBABLY not what you want, but you didn't specify....


2) You've said that repeated failures to login to the Solaris system with an AD account will result in the AD account becoming locked by the AD server. This indicates that the login credential passing is working correctly, and it is the login process itself that is failing -- I suspect that it may be because of permissions on the default login directory. Since the AD user won't have an entry in /etc/passwd, the login (or ssh) system will have to have them login to the / folder -- and, as with the above, they must have both READ and EXECUTE permissions on this (root) folder for login to complete. (Of course, you could have changed the default login path in a number of ways -- in which case, check the permissions to that path).

I hope this helps!

Dan
IT4SOHO

 

by: spcomputingPosted on 2009-08-03 at 10:11:08ID: 25006353

Dan,

I changed the permissions on the /data folder like you specified above, but I still cannot access /data from windows. Here is what the permissions are set as. Do I need to specify an AD user/group as owner of that folder? Does the smb.conf look ok?

drwxr-xr-x  30 root     root          34 Jul 22 12:51 .
drwxr-xr-x  30 root     root          34 Jul 22 12:51 ..
drwxrwxrwx 21 root     root          21 Jul 30 08:00 data

I agree with you that it sounds like it is a permissions issue on the Solaris box itself. When I try to SSH with an AD account, after 6 password attempts it responds with " Server sent disconnect message type 2 (protocol error): "Too many authentication failures for 'username' " I was able to lock the account on the domain earlier, but now it isn't locking it out, even if I enter a gibberish password. If I do kinit 'username' and enter a gibberish password, it shows badpwdcount 1 on the domain. So it might be something in PAM.conf that isn't using winbind for SSH.

Any other thoughts or ideas? Thank you for your time thus far, I truly appreciate it.



 

by: spcomputingPosted on 2009-08-24 at 06:56:57ID: 25168326

Since there hasn't been anymore replies, I have decided to stop using Samba and Winbind completely and am now working with Likewise Open which looks a lot more promising: http://www.likewise.com/products/likewise_open/


20120131-EE-VQP-002

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