[Samba] Problems with Winbind Idmap and Active Directory 2008 r2

[Matthew Choppen]

For our Linux Machines (SLES 10) we are using kerberos and LDAP to
authenticate against Active Directory (works perfectly)

Please note that the same configuration works with Windows 2003 Server, the
problem is with with Windows 2008 Server

However we are experiencing problems with winbind for the file share, I see
in the "log.winbind-idmap" logfile the following errors

[2011/03/03 15:09:08.643286,  1]
winbindd/idmap_ad.c:143(ad_idmap_cached_connection_internal)
  ad_idmap_init: failed to connect to AD
[2011/03/03 15:09:08.643323,  1]
winbindd/idmap_ad.c:326(idmap_ad_unixids_to_sids)
  ADS uninitialized: No logon servers
The user from windows clients experiences extremely poor performance (I
guess timeouts from winbind, and I would also guess that winbind then
assigns some kind of default ID and not the real uid/gid from AD)

The Unix Services for windows is applied and the users have the correct UNIX
settings (else LDAP / kerberos auth would not work)

I have also tried backend = ldap:ldap://OurADServer  which also does not
work!!!


Here is our current configuration:

samba3-3.5.2-43.suse101.x86_64.rpm
samba3-cifsmount-3.5.2-43.suse101.x86_64.rpm
samba3-client-3.5.2-43.suse101.x86_64.rpm
samba3-debuginfo-3.5.2-43.suse101.x86_64.rpm
samba3-doc-3.5.2-43.suse101.x86_64.rpm
samba3-utils-3.5.2-43.suse101.x86_64.rpm
samba3-winbind-32bit-3.5.2-43.suse101.i586.rpm
samba3-winbind-3.5.2-43.suse101.x86_64.rpm
Samba Config

[global]
    workgroup = MYDOMAIN
    password server = OurADServer
    domain master = no
    realm =  MYDOMAIN.COM
    server string = ClearCase Server
    netbios name = OURNAME
    security = ADS
    encrypt passwords = yes
    winbind use default domain = Yes
    winbind nested groups = Yes
    client use spnego = Yes
    winbind enum users = Yes
    winbind enum groups = Yes
    template shell = /bin/bash
    template homedir = /home/%u
    log level = 2
    log file = /var/log/samba/%m
    max log size = 50
    winbind separator = +
    #idmap uid = 40000-50000
    #idmap gid = 40000-50000
    winbind offline logon = true
    winbind cache time = 5
    winbind refresh tickets = true
    map to guest = Bad User
    username map = /etc/samba/users.map
    max open files = 11000
    add machine script = /usr/sbin/useradd -c Machine -d /var/lib/nobody -s
/bin/false %m$
    ldap ssl = No
    socket options = TCP_NODELAY SO_RCVBUF=16384 SO_SNDBUF=16384
    idmap backend = ad
    ldap idmap suffix = dc=mydomain,dc=com
    ldap admin dn = CN=bindUserFromAD,OU=Siteroles,OU=HAM,DC=mydomain,dc=com
    ldap suffix = dc=mydomain,dc=com
    usershare allow guests = Yes
    directory security mask = 0775
    kernel oplocks = No
    create mask = 0775
    directory mask = 0775
    map archive = No
    oplocks = No
    level2 oplocks = No
[vobs]
        comment = Vob storage directory
        path = /vobs
        valid users = @"MYDOMAIN+ccusers"
        writeable = Yes
        create mask = 0775
        force directory mode = 0775
[vobstore]
        comment = Vob storage directory
        path = /vobstore
        valid users = @"MYDOMAIN+ccusers"
        writeable = Yes
        create mask = 0775
        force directory mode = 0775
[ccviews]
        comment = View storage directory
        path = /ccviews
        valid users = @"MYDOMAIN+ccusers"
        writeable = Yes
        create mask = 0775
        force directory mode = 0775
Thanks for any assistance :)

Matt