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yesterday I upgraded my fedora box to the latest version, and with that, I also upgraded samba, now using samba 4. I used to access those share from any computer at home without user/password, but now there seems to be something wrong with the configuration.

Here is my smb.conf

    workgroup = mygroup
    server string = Samba Server Version %v
    netbios name = HOME-WS
    log file = /var/log/samba/log.%m
    max log size = 50
    guest ok = yes
    security = share

    path = /mnt/Media
    read only = yes
    browseable = yes
    guest ok = yes
    guest only = yes

    path = /mnt/Music
    read only = yes
    browseable = yes
    guest ok = yes
    guest only = yes

Looking at the logs, there is a warning related to the security parameter

 WARNING: Ignoring invalid value 'share' for parameter 'security'

Does that means that samba 4 has finally removed 'share' as an option, is there any alternative to it, so that I can configure shares without passwords.

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See the "guest access" section at the bottom of this page. – JasonAzze Jan 19 '13 at 18:23
You are my hero. I don't believe anyone else with only 158 reputation has a gold badge :). – Daniel Feb 28 at 9:00
up vote 20 down vote accepted

If you follow the FAQ link from JasonAzze, you will see there is a "map to guest" line which is also required, so you need both of these lines:

security = user
map to guest = Bad Password

I had the same problem as the OP, and I have tested that this solution works on Fedora 18

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Thanks, worked great! From smb.conf man page: "(map to guest) Bad User - Means user logins with an invalid password are rejected, unless the username does not exist, in which case it is treated as a guest login and mapped into the guest account." Combined with a "guest ok = yes" directive under a share will enable user/password-less browsing. – joelpet Dec 12 '13 at 21:31
Thanks, this helped alot. – Daniel Feb 28 at 8:58

I feel obligated to share this after spending hours trying to get this to work under SAMBA4 - here is my working SAMBA4 smb.conf that does NOT require a password to get to the share from windows


  workgroup = HOME

  server string = %h server (Samba, Ubuntu)

  dns proxy = no

  log file = /var/log/samba/log.%m

  max log size = 1000

  syslog = 0

  panic action = /usr/share/samba/panic-action %d

  server role = standalone server

  security = user

  map to guest = Bad Password

  passdb backend = tdbsam

  obey pam restrictions = yes

  unix password sync = yes

  passwd program = /usr/bin/passwd %u

  passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:*        %n\n *password\supdated\ssuccessfully* .

  pam password change = yes

  usershare allow guests = yes

    comment = HD Video Share
    path = /RAID/HD
    public = yes
    writable = yes
    available = yes
    browsable = yes
    guest ok = yes
    create mask = 0777
    directory mask = 0777
share|improve this answer
Thank you for sharing, but I still can't make it work. Maybe I'm missing some directory permission... Windows is no longer asking for a password, but says that there's no permission to access the shared folder. – Edgar Rocha Carvalho Aug 3 '15 at 2:25
You probably also need to chown your shared folder (in his case RAID/HD) or chmod it so it's globally Readable and eXecutable (chmod o+rX /your/dir) – Warren P Mar 25 at 19:58

I had to remember to do one other thing before I could get this to work... it was to make sure the permissions on my shared unix directory were read/write for the nobody user or the nogroup group. Debian Jessie, Samba 4.1.

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How exactly do you do that? What the heck is the nobodyuser/nobodygroup? – Warren P Mar 25 at 20:02

Change "security = share" to "security = user"

Reason: both share and server have been deprecated in Samba4.

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