[Samba] SAMBA Groups and Permissions

[Michael Gasch]

hi,

sorry, if i was too unprecise...

of course i'm working with acl's - otherwise i could hardly define those 
fine granulated rules

this is, what getfacls on /home/board gives:

~# getfacl /home/board

# file: home/board
# owner: root
# group: root
user::rwx
group::r-x
group:kids:r-x
mask::r-x
other::---
default:user::rwx
default:group::r-x
default:group:kids:r-x
default:mask::r-x
default:other::---


for some reasons, i don't want to work with "valid users" parameter, 
especially while working with scripts
so this solution doesn't meet my expectations (as i already mentioned)

the problem is on the samba-side
on unix-side the user "test_user" has access on /home/board, cause he's 
in group "kids", too

but samba just recognised group "users" for "test_user" because
sambaPrimaryGroupSID maps to -> "users"
so samba establishes a connection as user "testuser" / group "users", 
which fails because of my restrictive acl :/

so: is "valid users" my only chance?

no way of adding more GroupSIDs for samba-users in LDAP, that samba 
recognises, that user "test_user" is in more than one group ?

i mean: unix-side sees this...

~# id test_user
uid=596(test_user) gid=500(users) groups=500(users),522(kids)

thx for your help!!!

greez



stephane.purnelle at corman.be wrote:
> I confirm that Malte Müller says.
> If you want to set multiple group acces, you must use ACL.
> the valid user parameter in smb.conf force the right of directory but the
> unix right is only for group user.
> 
> 
> 
> 
> 
> -----------------------------------
> Stéphane PURNELLE                         stephane.purnelle at corman.be
> Service Informatique       Corman S.A.           Tel : 00 32 087/342467
> 
> 
>                                                                                                                                                      
>                     mamue at lb-bbs1.emd.ni.schule.de                                                                                                   
>                     Envoyé par :                                           Pour :  "Michael Gasch" <gasch at eva.mpg.de>                                
>                     samba-bounces+stephane.purnelle=corman.be at lists        cc :    samba at lists.samba.org                                             
>                     .samba.org                                             Objet :      Re: [Samba] SAMBA Groups and Permissions                     
>                                                                                                                                                      
>                                                                                                                                                      
>                     04/12/2003 11:41                                                                                                                 
>                                                                                                                                                      
>                                                                                                                                                      
> 
> 
> 
> 
> I am not shure if i got you right. You do not tell us the access rights of
> the directory concerned.
> If you'r primary uninx group is user and your dir. has:
> drwx---rwx   root user board
> they forbid your access. then you are not allowed to access, because group
> rights match first and If you weren't user but world, then you would be
> allowed. This has nothing to do with samba.
> You might want to change the group to nogroup and work with acls (if ext3,
> XFS and alike). Or if you have plenty of CPU-cycles to waste you might
> work with "valid users" in smb.conf.
> But i'm not a security or filesystem-expert and may be completely wrong.
> 
> Kind regards,
> Malte Müller
> 
> 
>>hi
>>
>>i have a user
>>
>>~# id test_user
>>uid=500,gid=500 (users),groups (users,kids)
>>
>>as you can see, this user is in primary group "users" and also member of
>>group "kids"
>>
>>if he tries to access /home/board via smb (Samba 3.0 + openldap) from a
>>windows client (XP), he fails, because his
>>
>>sambaPrimaryGroupSID maps to -> "users"
>>
>>and /home/board is not accessible for group "users" - just for "kids"
>>if i add
>>
>>valid users = @kids
>>
>>to /home/board - share, access is granted
>>
>>isn't it possible in samba, that the user "test_user" gets an attribute
>>like
>>
>>sambaSecondaryGroup in ldap ????
>>
>>so that samba knows: "this user is in group users AND kids, so i have to
>>try connections to share /home/board as group users AND kids" ???
>>
>>if i login locally to the samba PDC with a console as "test_user",
>>access to /home/board is granted, 'cause i'm member of "kids"
>>
>>so there's no permission problem
>>
>>please help me !!!
>>
>>greez
>>
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