[Samba] Samba AD master browser
Maarten Claes
MClaes at baltimoreaircoil.be
Mon Dec 8 01:23:20 MST 2014
Installed: Samba 4.1.13, running as AD
>From time to time, users get disconnected from their shares. At that
moment, windows explorer is not responding, freezing up the whole PC.
I suspect this issue is caused by samba4 not being the master browser.
Running smbclient -L on the AD server returns nothing for the master
browser:
[root at BEHESR-FS1 ~]# smbclient -L //localhost -U Administrator
..........
Domain=[BACEU] OS=[] Server=[]
Server Comment
--------- -------
Workgroup Master
--------- -------
Running the same command on our current SMB3 server (being migrated to the
samba AD domain) returns this:
[root at BEHESR-FS1 ~]# smbclient -L //x.x.x.x -U Administrator
..........
Workgroup Master
--------- -------
.....
BACEU H3Q7422
with H3Q7422 being a windows7 client.
with SMB3, with the seperate nmb daemon there was the option to force the
election (smbcontrol nmbd force-election). How can this be done with
samba4 AD?
Also, nothing is logged about the election process. It looks like samba is
not starting the election process.
smb.conf:
[global]
dos charset = CP850
unix charset = UTF-8
workgroup = BACEU
realm = BAC.EU
netbios name = BEHESR-FS1
netbios aliases =
netbios scope =
server string = Samba 4.1.13
interfaces = x.x.x.x/20, 127.0.0.1/8
bind interfaces only = Yes
server role = active directory domain controller
security = USER
auth methods =
encrypt passwords = Yes
client schannel = Auto
server schannel = Auto
allow trusted domains = Yes
map to guest = Never
null passwords = No
obey pam restrictions = No
password server = *
smb passwd file = /usr/local/samba/private/smbpasswd
private dir = /usr/local/samba/private
passdb backend = samba_dsdb
algorithmic rid base = 1000
root directory =
guest account = nobody
enable privileges = Yes
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 =
username level = 0
unix password sync = No
restrict anonymous = 0
lanman auth = No
ntlm auth = Yes
client NTLMv2 auth = Yes
client lanman auth = No
client plaintext auth = No
client use spnego principal = No
preload modules =
dedicated keytab file =
kerberos method = default
map untrusted to domain = No
log level = 2
syslog = 1
syslog only = No
log file = /var/log/samba/log.%m
max log size = 2200
debug timestamp = Yes
debug prefix timestamp = No
debug hires timestamp = Yes
debug pid = No
debug uid = No
debug class = No
enable core files = Yes
smb ports = 445, 139
large readwrite = Yes
server max protocol = SMB3
server min protocol = LANMAN1
client max protocol = SMB3
client min protocol = CORE
unicode = Yes
min receivefile size = 0
read raw = Yes
write raw = Yes
disable netbios = No
reset on zero vc = Yes
log writeable files on exit = No
defer sharing violations = Yes
nt pipe support = Yes
nt status support = Yes
max mux = 50
max xmit = 16644
name resolve order = lmhosts, wins, host, bcast
max ttl = 259200
max wins ttl = 518400
min wins ttl = 21600
time server = No
unix extensions = No
use spnego = Yes
client signing = default
server signing = default
client use spnego = Yes
client ldap sasl wrapping = plain
enable asu support = No
svcctl list =
cldap port = 0
dgram port = 0
nbt port = 0
krb5 port = 0
kpasswd port = 0
web port = 0
rpc big endian = No
deadtime = 120
getwd cache = Yes
keepalive = 60
lpq cache time = 30
max smbd processes = 0
max disk size = 0
max open files = 16384
socket options = TCP_NODELAY
use mmap = Yes
use ntdb = No
hostname lookups = No
name cache timeout = 660
ctdbd socket =
cluster addresses =
clustering = No
ctdb timeout = 0
ctdb locktime warn threshold = 0
smb2 max read = 1048576
smb2 max write = 1048576
smb2 max trans = 1048576
smb2 max credits = 8192
load printers = No
printcap cache time = 0
printcap name = /dev/null
cups server =
cups encrypt = No
cups connection timeout = 30
iprint server =
disable spoolss = No
addport command =
enumports command =
addprinter command =
deleteprinter command =
show add printer wizard = Yes
os2 driver map =
mangling method = hash2
mangle prefix = 1
max stat cache size = 256
stat cache = Yes
machine password timeout = 604800
add user script =
rename 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 =
username map script =
username map cache time = 0
logon script =
logon path = \\%N\%U\profile
logon drive =
logon home = \\%N\%U
domain logons = No
init logon delayed hosts =
init logon delay = 100
os level = 255
lm announce = Auto
lm interval = 60
preferred master = Yes
local master = Yes
domain master = Yes
browse list = Yes
enhanced browsing = Yes
dns proxy = Yes
wins proxy = No
wins server =
wins support = Yes
wins hook =
lock spin time = 200
oplock break wait time = 0
ldap admin dn =
ldap delete dn = No
ldap group suffix =
ldap idmap suffix =
ldap machine suffix =
ldap passwd sync = no
ldap replication sleep = 1000
ldap suffix =
ldap ssl = start tls
ldap ssl ads = No
ldap deref = auto
ldap follow referral = Auto
ldap timeout = 15
ldap connection timeout = 2
ldap page size = 1024
ldap user suffix =
ldap debug level = 0
ldap debug threshold = 10
eventlog list =
add share command =
change share command =
delete share command =
preload =
lock directory = /usr/local/samba/var/lock
state directory = /usr/local/samba/var/locks
cache directory = /usr/local/samba/var/cache
pid directory = /usr/local/samba/var/run
ntp signd socket directory =
utmp directory =
wtmp directory =
utmp = No
default service =
message command =
get quota command =
set quota command =
remote announce =
remote browse sync =
nbt client socket address = 0.0.0.0
nmbd bind explicit broadcast = Yes
homedir map = auto.home
afs username map =
afs token lifetime = 604800
log nt token command =
NIS homedir = No
registry shares = No
usershare allow guests = No
usershare max shares = 0
usershare owner only = Yes
usershare path = /usr/local/samba/var/locks/usershares
usershare prefix allow list =
usershare prefix deny list =
usershare template share =
async smb echo handler = No
panic action =
perfcount module =
host msdfs = Yes
passdb expand explicit = No
idmap backend = tdb
idmap cache time = 604800
idmap negative cache time = 120
idmap uid =
idmap gid =
template homedir = /home/%D/%U
template shell = /bin/false
winbind separator = \
winbind cache time = 300
winbind reconnect delay = 30
winbind request timeout = 60
winbind max clients = 200
winbind enum users = Yes
winbind enum groups = Yes
winbind use default domain = No
winbind trusted domains only = No
winbind nested groups = Yes
winbind expand groups = 5
winbind nss info = template
winbind refresh tickets = No
winbind offline logon = No
winbind normalize names = No
winbind rpc only = No
create krb5 conf = Yes
ncalrpc dir = /usr/local/samba/var/run/ncalrpc
winbind max domain connections = 1
winbindd socket directory =
winbindd privileged socket directory =
winbind sealed pipes = No
allow dns updates = disabled
dns forwarder =
dns update command =
nsupdate command =
rndc command =
multicast dns register = Yes
samba kcc command =
server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl,
winbind, ntp_signd, kcc, dnsupdate
dcerpc endpoint servers =
spn update command =
share backend =
tls enabled = No
tls keyfile =
tls certfile =
tls cafile =
tls crlfile =
tls dh params file =
rpc_server:tcpip = no
rpc_daemon:spoolssd = embedded
rpc_server:spoolss = embedded
rpc_server:winreg = embedded
rpc_server:ntsvcs = embedded
rpc_server:eventlog = embedded
rpc_server:srvsvc = embedded
rpc_server:svcctl = embedded
rpc_server:default = external
idmap_ldb:use rfc2307 = yes
idmap config * : backend = tdb
comment =
path =
username =
invalid users =
valid users = +BAC.EU\BEHE
admin users =
read list =
write list =
force user =
force group =
read only = Yes
acl check permissions = Yes
acl group control = No
acl map full control = Yes
acl allow execute always = No
create mask = 0770
force create mode = 00
directory mask = 0770
force directory mode = 00
force unknown acl user = No
inherit permissions = No
inherit acls = No
inherit owner = No
guest only = No
administrative share = No
guest ok = No
only user = No
hosts allow =
hosts deny =
allocation roundup size = 1048576
aio read size = 0
aio write size = 0
aio write behind =
ea support = No
nt acl support = Yes
profile acls = No
map acl inherit = No
afs share = No
smb encrypt = default
durable handles = Yes
block size = 1024
change notify = Yes
directory name cache size = 100
kernel change notify = Yes
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
print notify backchannel = Yes
print ok = No
printing = cups
cups options =
print command =
lpq command = %p
lprm command =
lppause command =
lpresume command =
queuepause command =
queueresume command =
printer name =
use client driver = No
default devmode = Yes
force printername = No
printjob username = %U
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 archive = No
map hidden = No
map system = No
map readonly = no
mangled names = Yes
store dos attributes = Yes
dmapi support = No
browseable = Yes
access based share enum = No
blocking locks = No
csc policy = manual
fake oplocks = No
kernel oplocks = Yes
kernel share modes = Yes
locking = No
oplocks = Yes
level2 oplocks = No
oplock contention limit = 2
posix locking = No
strict locking = No
dfree cache time = 0
dfree command =
copy =
preexec =
preexec close = No
postexec =
root preexec =
root preexec close = No
root postexec =
available = Yes
volume =
fstype = NTFS
wide links = Yes
follow symlinks = Yes
dont descend =
magic script =
magic output =
delete readonly = Yes
dos filemode = No
dos filetimes = Yes
dos filetime resolution = No
fake directory create times = No
vfs objects = dfs_samba4, acl_xattr
msdfs root = No
msdfs proxy =
ntvfs handler =
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