-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Understood. That changes a little the policy, but I could still create one mount point per user inside his own home. That still leaves me with the possibility of listing /home, which could be achieved by removing the read flag on the directory on normal permission mode and so on, so I guess SELinux wouldn't be needed in that case. Thanks for your help. If you have any comments or proposals I am open to them. Thanks once again, Ioannis Stephen Smalley wrote: > On Tue, 2008-05-27 at 20:08 +0200, Ioannis Aslanidis wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> Stephen Smalley wrote: >>> If I understand correctly, you want to provide separation on a per-user >>> basis (not just per-role) for NFS-mounted home directories. I don't >>> think that is realistically supportable by SELinux today, as 1) SELinux >>> distinguishes based on security context/label, not uid, and 2) NFS >>> doesn't support file labeling yet. Sounds more like a job for 'normal >>> permissions' i.e. discretionary access modes and/or ACLs. There is >>> ongoing work to support file labeling in NFSv4, but it is still in >>> development, and even then, instantiating a separate role for every user >>> is going to be problematic for any large number of users. >>> >> >> And would there be a way to do something so that each user has a >> different context? That is to say, I can assign a different context to >> each user and have something easily maintained. Do you see that viable? > > It can be done (e.g. you can define a SELinux user in policy for each of > your users and then use a policy constraint on the user identity field > to enforce the separation, or you can define per-user roles in policy > and use the RBAC support), but I'm not sure how practical it is. But > even if it were done, without labeling support in NFS, you can't use it > for NFS-mounted home directories (you are limited to a single context > per filesystem there at present). > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFIPF0zFq+8w76sCAARAmICAJ9BzLJdQv1f9tWKt9SbCXAES89FvACgswzB GV7yhgfJEZCmxUlgpq/0U4g= =CwtZ -----END PGP SIGNATURE----- -- This message was distributed to subscribers of the selinux mailing list. If you no longer wish to subscribe, send mail to majordomo@xxxxxxxxxxxxx with the words "unsubscribe selinux" without quotes as the message.
