Set SMB2 protocol in Samba 3.6.6

I've decided to switch to the higher version of SMB in Samba (at least 2) - mostly because of the security reasons. I've tried to add to the smb.conf in the [global] section: client min protocol = SMB2 client max protocol = SMB3 server min protocol = SMB2 or just protocol=SMB2 I have restarted samba or the whole server after each try. But logs say: [1970/01/01 01:01:12.085949, 0] smbd/negprot.c:706(reply_negprot) No protocol supported ! [1970/01/01 01:01:13.153024, 0] smbd/negprot.c:706(reply_negprot) No protocol supported ! [2018/11/04 12:10:25.080148, 0] param/loadparm.c:7997(lp_do_parameter) Ignoring unknown parameter "server min protocol" [2018/11/04 12:10:25.092055, 0] param/loadparm.c:7997(lp_do_parameter) Ignoring unknown parameter "client min protocol" [2018/11/04 12:10:30.803144, 0] param/loadparm.c:7997(lp_do_parameter) Ignoring unknown parameter "server min protocol" [2018/11/04 12:10:30.804260, 0] param/loadparm.c:7997(lp_do_parameter) Ignoring unknown parameter "client min protocol" I've googled a little and noticed that some people configure cufs also in the FSTAB. I think I had not done this and it was working just becasue of smb.conf.
Here is my FSTAB: roc /proc proc defaults 0 0 /dev/mmcblk0p1 /boot vfat defaults 0 2 /dev/mmcblk0p2 / ext4 defaults,noatime 0 1 UUID=34150b89-5e8b-4769-8b68-f403659c58f7 /media/USBHD auto defaults,_netdev 0 2 And here is the smb.conf part defining the shared folder: [USBHD] comment=Dysk udostepniony path = /media/USBHD valid users = @users force group = users create mask = 0777 directory mask = 0777 read only = no writeable = yes browseable = yes public = yes Should I edit FSTAB? How?
When is it possible to configure version protocol like in the MAN page in the smb.conf, when it's necessary to do this in FSTAB?
**I guess that *min protocol* may not be available in the Samba version I use. But anyway, it supports SMB2 protocol, so how can I switch it on?** Samba version 3.6.6
NAME="Raspbian GNU/Linux" VERSION_ID="7" VERSION="7 (wheezy)" Kernel: 4.1.19+ testparm -v Load smb config files from /etc/samba/smb.conf rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384) Unknown parameter encountered: "client min protocol" Ignoring unknown parameter "client min protocol" Unknown parameter encountered: "client max protocol" Ignoring unknown parameter "client max protocol" Processing section "[homes]" Processing section "[printers]" Processing section "[print$]" Processing section "[USBHD]" Loaded services file OK. Server role: ROLE_STANDALONE Press enter to see a dump of your service definitions [global] display charset = LOCALE workgroup = WORKGROUP realm = netbios name = RASPBERRYPI netbios aliases = netbios scope = server string = %h server interfaces = bind interfaces only = No security = USER auth methods = encrypt passwords = Yes client schannel = Auto server schannel = Auto allow trusted domains = Yes map to guest = Bad User null passwords = No obey pam restrictions = Yes password server = * smb passwd file = /etc/samba/smbpasswd private dir = /etc/samba passdb backend = tdbsam algorithmic rid base = 1000 root directory = guest account = nobody enable privileges = Yes pam password change = Yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword: * %n\n *password\supdated\ssuccessfully* . passwd chat debug = No passwd chat timeout = 2 check password script = username map = password level = 0 username level = 0 unix password sync = Yes restrict anonymous = 0 lanman auth = No ntlm auth = Yes raw NTLMv2 auth = No client NTLMv2 auth = Yes client lanman auth = No client plaintext auth = No client use spnego principal = No send spnego principal = No preload modules = dedicated keytab file = kerberos method = default map untrusted to domain = No log level = 2 syslog = 0 syslog only = No log file = /var/log/samba/log.%m max log size = 1000 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 max protocol = SMB2 min protocol = CORE min receivefile size = 0 read raw = Yes write raw = Yes disable netbios = No reset on zero vc = No log writeable files on exit = No acl compatibility = auto 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 = lmhosts wins host bcast max ttl = 259200 max wins ttl = 518400 min wins ttl = 21600 time server = No unix extensions = Yes allow dcerpc auth level connect = No use spnego = Yes client signing = auto server signing = No client use spnego = Yes client ldap sasl wrapping = sign enable asu support = No svcctl list = deadtime = 0 getwd cache = Yes keepalive = 300 lpq cache time = 30 max smbd processes = 0 paranoid server security = Yes max disk size = 0 max open files = 16384 socket options = TCP_NODELAY use mmap = Yes hostname lookups = No name cache timeout = 660 ctdbd socket = cluster addresses = clustering = No ctdb timeout = 0 ctdb locktime warn threshold = 0 smb2 max read = 65536 smb2 max write = 65536 smb2 max trans = 65536 smb2 max credits = 8192 load printers = Yes printcap cache time = 750 printcap name = 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 = 20 lm announce = Auto lm interval = 60 preferred master = No local master = Yes domain master = Auto browse list = Yes enhanced browsing = Yes dns proxy = No wins proxy = No wins server = wins support = No wins hook = kernel oplocks = Yes 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 = /var/run/samba state directory = /var/lib/samba cache directory = /var/cache/samba pid directory = /var/run/samba utmp directory = wtmp directory = utmp = No default service = message command = get quota command = set quota command = remote announce = remote browse sync = 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 = time offset = 0 NIS homedir = No registry shares = No usershare allow guests = Yes usershare max shares = 100 usershare owner only = Yes usershare path = /var/lib/samba/usershares usershare prefix allow list = usershare prefix deny list = usershare template share = allow insecure wide links = No async smb echo handler = No multicast dns register = Yes panic action = /usr/share/samba/panic-action %d 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 max clients = 200 winbind enum users = No winbind enum groups = No winbind use default domain = No winbind trusted domains only = No winbind nested groups = Yes winbind expand groups = 1 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 = /var/ncalrpc winbind max domain connections = 1 idmap config * : backend = tdb comment = path = username = invalid users = valid users = admin users = read list = write list = printer admin = force user = force group = read only = Yes acl check permissions = Yes acl group control = No acl map full control = Yes create mask = 0744 force create mode = 00 security mask = 0777 force security mode = 00 directory mask = 0755 force directory mode = 00 directory security mask = 0777 force directory security 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 = auto 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 = Yes map hidden = No map system = No map readonly = yes mangled names = Yes store dos attributes = No dmapi support = No browseable = Yes access based share enum = No 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 = Auto share modes = Yes 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 set directory = No wide links = No 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 = [homes] comment = Home Directories valid users = %S create mask = 0700 directory mask = 0700 browseable = No [printers] comment = All Printers path = /var/spool/samba create mask = 0700 printable = Yes print ok = Yes browseable = No [print$] comment = Printer Drivers path = /var/lib/samba/printers [USBHD] comment = Dysk udostepniony path = /media/USBHD valid users = @users force group = users read only = No create mask = 0777 directory mask = 0777 guest ok = Yes