Собствено subj. Пользователи локальные. В smbpasswd прописаны, находятся в отдельной группе.
Вот весь smb.conf:
[global]
netbios name = MYCOMP
workgroup = MYDOM
interfaces = eth0 192.168.10.1/255.255.255.0
bind interfaces only = yes
socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192 IPTOS_LOWDELAY
encrypt passwords = yes
security = user
log file = /var/log/samba-acl.log
debuglevel = 0
character set = KOI8-R
client code page = 866
preserve case = yes
short preserve case = yes
nt acl support = yes
[exchange]
comment = Folder for information exchange
path = /mnt/mobile
browseable = yes