Setting up a home share
In a professional environment, you setup the permissions on the share, containing the user homes, in a way that allows the automatic creation for new accounts, without setting ACLs manually.
[home] path = /srv/samba/home/ read only = No
Note: Don't name the share “[homes]”, as this is a special section (see the smb.conf manpage)! The “[homes]” section can't handle the automatic folder creation, we'll setup below!
# mkdir -p /srv/samba/home/
# smbcontrol all reload-config
The following steps can be performed on any Windows client.
Note: If you have the requirement, that your users need to access their home folder locally on the server, too, you have to add a group that contains these user accounts. Add this group in all steps below and set the permissions to exactly the same than for “Authenticated users”. Of course this group must be available locally trough winbindd, sssd, nslcd, or other. This is required, because if the user log in locally on the server, there is no “Authenticated User”!
Authenticated Users: Full Control Domain Admins: Full Control System: Full Control
If you have the requirement, that your users need access their home folder locally on the server, too, additionally or add a group that contains these user accounts. Because if the user log in locally on the server, there is no “Authenticated User”! The permissions for this additional group have to be the same than for “Authenticated users“
If this fails with a ”permission denied“ error, recheck, and check if you are using an account with SeDiskOperatorPrivilege privileges!
Administrator: Full Control Authenticated Users: Read & Execute, List Folder Contents, Read Creator Owner: Full Control Domain Admins: Full Control System: Full Control
The “Creator Owner” permissions are automatically limited to “Subfolder and files only”. This is correct.
Close the “Edit” window with “OK” and return to the “Security” tab.
For these steps, you must have the Microsoft RSAT (Remote Server Administration Tools) installed.
The account that is used for account creation must have the respective permissions in AD and on the home share (e. g. “Domain Administrator”).
If you check the ACLs on the folder on Windows, you can see that the ACLs are applied as configured:
Only the defined users have permissions. „Authenticated Users“ are not inclueded and can't access the users home folder.
On *nix side, you have to check the entire ACLs with getfacl, to see the extended ACLs.
Here is the getfacl output of the folder that is shown above in the Windows example:
# getfacl /srv/samba/home/demo1 # file: srv/samba/home/demo1 # owner: 3000000 # group: Domain\040Users user::rwx user:Administrator:rwx user:demo1:rwx <-- This entry only appears, if you had assigned a UID in the „Unix Attributes“ tab before the home was created! group::--- group:Domain\040Users:--- group:3000000:rwx group:3000002:rwx group:3000008:rwx mask::rwx other::--- default:user::rwx default:user:Administrator:rwx default:user:demo1:rwx <-- This entry only appears, if you had assigned a UID in the „Unix Attributes“ tab before the home was created! default:user:3000000:rwx default:group::--- default:group:Domain\040Users:--- default:group:3000000:rwx default:group:3000002:rwx default:group:3000008:rwx default:mask::rwx default:other::---
As some of the xIDs are may not be resolved, you can search for them in the local ID mapping database of Samba for them. Example:
# ldbsearch -H /usr/local/samba/private/idmap.ldb xidNumber=3000000 dn # record 1 dn: CN=S-1-5-32-544 # returned 1 records # 1 entries # 0 referrals
As the xidNumber assignment is individual on each machine, there is no general translation table. But the output of the ldbsearcch command shows, that the entry with xidNumber 3000000 is assigned to the DN „S-1-5-32-544“. A list of well known security identifiers is provided by Microsoft: http://support.microsoft.com/kb/243330/en.