I've got a strange problem with certain Active Directory user accounts that
are members of more than 32 groups. It seems that Samba (or winbind?)
completely ignores extended groups if it crosses over 32 groups.

This seems to be a Samba specific issue;

* When the AD user is logs in via ssh, it can perform writes to the
resource; the same user browsing via Samba will get an "Access Denied"
error.

* Additionally, same user, same groups, same resource, writes will occur if
it uses vsftpd, writes won't if its through Samba.

* If the primary group is changed to the group of the resource, the user can
write via Samba; however if the primary group is something else yet the user
is a member of the resource group in extended groups, "Access Denied" again.


Everything works perfectly. Wibind is returning all the proper users and
groups of AD.

This is debian-sarge. Samba 3.0.14a-3sarge4. Kernel 2.6.20. Windows
Server 2000 SP4 - Active Directory.

Any help is greatly appreciated.

smb.conf:

[global]
dos charset = CP850
unix charset = UTF-8
display charset = LOCALE
workgroup = XYZ
realm = XYZ.LOCAL
netbios name = A-WHITEWATER
netbios aliases =
netbios scope =
server string = ""
interfaces =
bind interfaces only = No
security = ADS
auth methods = winbind
encrypt passwords = Yes
update encrypted = No
client schannel = Auto
server schannel = Auto
allow trusted domains = No
hosts equiv =
min password length = 5
map to guest = Never
null passwords = No
obey pam restrictions = Yes
password server = xxx.xxx.xxx.yyy
smb passwd file = /etc/samba/smbpasswd
private dir = /etc/samba
passdb backend = smbpasswd
algorithmic rid base = 1000
root directory =
guest account = nobody
enable privileges = No
pam password change = No
passwd program =
passwd chat = *new*password* %n\n *new*password* %n\n *changed*
passwd chat debug = No
passwd chat timeout = 2
check password script =
username map =
password level = 0
username level = 0
unix password sync = No
restrict anonymous = 0
lanman auth = Yes
ntlm auth = Yes
client NTLMv2 auth = No
client lanman auth = Yes
client plaintext auth = Yes
preload modules =
use kerberos keytab = No
log level = 3
syslog = 1
syslog only = No
log file = /var/log/samba/%m
max log size = 0
debug timestamp = Yes
debug hires timestamp = No
debug pid = No
debug uid = No
smb ports = 445 139
large readwrite = Yes
max protocol = NT1
min protocol = CORE
read bmpx = No
read raw = Yes
write raw = Yes
disable netbios = No
acl compatibility =
defer sharing violations = Yes
nt pipe support = Yes
nt status support = Yes
announce version = 4.9
announce as = NT
max mux = 50
max xmit = 16644
name resolve order = host bcast
max ttl = 259200
max wins ttl = 518400
min wins ttl = 21600
time server = No
unix extensions = Yes
use spnego = Yes
client signing = auto
server signing = No
client use spnego = Yes
change notify timeout = 60
deadtime = 0
getwd cache = Yes
keepalive = 300
kernel change notify = Yes
lpq cache time = 30
max smbd processes = 0
paranoid server security = Yes
max disk size = 0
max open files = 10000
socket options = TCP_NODELAY
use mmap = Yes
hostname lookups = Yes
name cache timeout = 660
load printers = No
printcap cache time = 0
printcap name =
cups server =
disable spoolss = No
enumports command =
addprinter command =
deleteprinter command =
show add printer wizard = Yes
os2 driver map =
mangling method = hash2
mangle prefix = 1
stat cache = Yes
machine password timeout = 604800
add user script =
delete user script =
add group script =
delete group script =
add user to group script =
delete user from group script =
set primary group script =
add machine script =
shutdown script =
abort shutdown script =
logon script =
logon path = \\%N\%U\profile
logon drive =
logon home = \\%N\%U
domain logons = No
os level = 20
lm announce = Auto
lm interval = 60
preferred master = No
local master = No
domain master = No
browse list = Yes
enhanced browsing = Yes
dns proxy = Yes
wins proxy = No
wins server =
wins support = No
wins hook =
wins partners =
kernel oplocks = Yes
lock spin count = 3
lock spin time = 10
oplock break wait time = 0
ldap admin dn =
ldap delete dn = No
ldap filter = (uid=%u)
ldap group suffix =
ldap idmap suffix =
ldap machine suffix =
ldap passwd sync = no
ldap replication sleep = 1000
ldap suffix =
ldap ssl =
ldap timeout = 15
ldap user suffix =
add share command =
change share command =
delete share command =
config file =
preload =
lock directory =
pid directory = /var/run/samba
utmp directory =
wtmp directory =
utmp = No
default service =
message command =
dfree command =
get quota command =
set quota command =
remote announce =
remote browse sync =
socket address = 0.0.0.0
homedir map = auto.home
afs username map =
afs token lifetime = 604800
log nt token command =
time offset = 0
NIS homedir = No
panic action = /usr/share/samba/panic-action %d
host msdfs = No
enable rid algorithm = Yes
idmap backend =
idmap uid = 45000-50000
idmap gid = 45000-50000
template primary group = nobody
template homedir = /var/ftp/%u
template shell = /bin/sh
winbind separator = \
winbind cache time = 300
winbind enable local accounts = No
winbind enum users = Yes
winbind enum groups = Yes
winbind use default domain = Yes
winbind trusted domains only = No
winbind nested groups = Yes
comment =
path = 2775
username =
invalid users =
valid users =
admin users =
read list =
write list =
printer admin =
force user =
force group =
read only = Yes
create mask = 0664
force create mode = 0664
security mask = 0777
force security mode = 00
directory mask = 0755
force directory mode = 02775
directory security mask = 0777
force directory security mode = 00
force unknown acl user = No
inherit permissions = No
inherit acls = No
guest only = No
guest ok = No
only user = No
hosts allow =
hosts deny =
allocation roundup size = 1048576
ea support = No
nt acl support = Yes
profile acls = No
map acl inherit = No
afs share = No
block size = 1024
max connections = 0
min print space = 0
strict allocate = No
strict sync = No
sync always = No
use sendfile = No
write cache size = 0
max reported print jobs = 0
max print jobs = 1000
printable = No
printing = bsd
cups options =
print command = lpr -r -P'%p' %s
lpq command = lpq -P'%p'
lprm command = lprm -P'%p' %j
lppause command =
lpresume command =
queuepause command =
queueresume command =
printer name =
use client driver = No
default devmode = No
force printername = No
default case = lower
case sensitive = Auto
preserve case = Yes
short preserve case = Yes
mangling char = ~
hide dot files = Yes
hide special files = No
hide unreadable = No
hide unwriteable files = No
delete veto files = No
veto files =
hide files =
veto oplock files =
map system = No
map hidden = No
map archive = Yes
mangled names = Yes
mangled map =
store dos attributes = No
browseable = Yes
blocking locks = Yes
csc policy = manual
fake oplocks = No
locking = Yes
oplocks = Yes
level2 oplocks = Yes
oplock contention limit = 2
posix locking = Yes
strict locking = Yes
share modes = Yes
copy =
include = /etc/samba/shares.conf
preexec =
preexec close = No
postexec =
root preexec =
root preexec close = No
root postexec =
available = Yes
volume =
fstype = NTFS
set directory = No
wide links = Yes
follow symlinks = Yes
dont descend =
magic script =
magic output =
delete readonly = No
dos filemode = No
dos filetimes = Yes
dos filetime resolution = No
fake directory create times = No
vfs objects =
msdfs root = No
msdfs proxy =
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