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diff --git a/docs/textdocs/GROUP-MAPPING-HOWTO.txt b/docs/textdocs/GROUP-MAPPING-HOWTO.txt new file mode 100644 index 0000000000..26ff5cd4cf --- /dev/null +++ b/docs/textdocs/GROUP-MAPPING-HOWTO.txt @@ -0,0 +1,77 @@ +Samba 3.0 prealpha guide to group mapping +--------------------------------------------------- + +Jean François Micouleau (jfm@samba.org) + +Starting with Samba 3.0 alpha 2, a new group mapping function is available. The +current method (likely to change) to manage the groups is a new command called +smbgroupedit. + +The first immediate reason to use the group mapping on a PDC, is that the +'domain admin group' of smb.conf is now gone. This parameter used to make +administrators the listed users. It was some magic stuff that simply worked but +didn't scale very well for complex setups. + +Let me explain how it works on NT/W2K, to have this magic fades away. +When installing NT/W2K on a computer, the installer program creates some users +and groups. Notably the 'Administrators' group, and gives to that group some +privileges like the ability to change the date and time or to kill any process +(or close too) running on the local machine. The 'Administrator' user is a +member of the 'Administrators' group, and thus 'inherit' the 'Administrators' +group privileges. If a 'joe' user is created and become a member of the +'Administrator' group, 'joe' has exactly the same rights as 'Administrator'. + +When a NT/W2K machine is joined to a domain, during that phase, the "Domain +Administrators' group of the PDC is added to the 'Administrators' group of the +workstation. Every members of the 'Domain Administrators' group 'inherit' the +rights of the 'Administrators' group when logging on the workstation. + + +You are now wondering how to make some of your samba PDC users members of the +'Domain Administrators' ? That's really easy. + +1) create a unix group (usually in /etc/group), let's call it domadm +2) add to this group the users that must be Administrators. For example if you +want joe,john and mary, your entry in /etc/group will look like: + + domadm:x:502:joe,john,mary + +3) map this domadm group to the 'domain admins' group: + +3.1) lists all the mapped groups by running: smbgroupedit -v + you will get a list looking like the one below. + +NT group (SID) -> Unix group +System Operators (S-1-5-32-549) -> -1 +Replicators (S-1-5-32-552) -> -1 +Guests (S-1-5-32-546) -> -1 +Power Users (S-1-5-32-547) -> -1 +Print Operators (S-1-5-32-550) -> -1 +Administrators (S-1-5-32-544) -> -1 +Account Operators (S-1-5-32-548) -> -1 +Backup Operators (S-1-5-32-551) -> -1 +Users (S-1-5-32-545) -> -1 +Domain Admins (S-1-5-21-1108995562-3116817432-1375597819-512) -> -1 +Domain Guests (S-1-5-21-1108995562-3116817432-1375597819-514) -> -1 +Domain Users (S-1-5-21-1108995562-3116817432-1375597819-513) -> -1 + +3.2) map the unix domadm group to the NT 'Domain Admins' group, by running the +command: + + smbgroupedit -c S-1-5-21-1108995562-3116817432-1375597819-512 -u domadm + +warning: don't copy and paste this sample, the Domain Admins SID (the +S-1-5-21-...-512) is different for every PDC. + +you're set, joe, john and mary are domain administrators ! + + + +Like the Domain Admins group, you can map any arbitrary Unix group to any NT +group. You can also make any Unix group a domain group. For example, on a domain +member machine (an NT/W2K or a samba server running winbind), you would like to +give access to a certain directory to some users who are member of a group on +your samba PDC. Flag that group as a domain group by running: + + smbgroupedit -a unixgroup -td + |