On Tue, 30 Apr 2013, Alexander Bokovoy wrote:
On Tue, 30 Apr 2013, simon.willi...@thehelpfulcat.com wrote:
That is actually pretty good news. The real requirement is network
storage for the Windows workstations secured by FreeIPA authentication.
If I read what you’ve said correctly this is possible now. I can live
with the magical incantations to enrol any new Windows machines for
now. There are a few things that would work better if Windows thought
it was logging on to a domain, but we have lived without those features
for the last year. Once a Windows machine has been set up correctly,
which can be a bit hit and miss, the authentication works flawlessly .
To be clear, we have not tested this combination so you'll be in uncharted
waters.
Since TGT for these users would still be issued by FreeIPA KDC, it would
include MS-PAC with SIDs of these users in FreeIPA domain -- once you
have run ipa-adtrust-install, of course. Thus, smbd on IPA master would
be able to recognize them as FreeIPA users regardless where they come
from -- IPA or Windows machines, as long as Kerberos is in use.
Any reports of how such setup would actually behave are welcomed.
It sounds as though I can set up the file server now and then extend it
to do the AD DC bit when it is ready.
I don’t suppose there is a Samba 4 + FreeIPA 3 file server HowTo
anywhere is there?
The only requirements for simplistic setup is to:
1. run file server on IPA master (you can make a dedicated replica for that)
2. run ipa-adtrust-install on that master to setup Samba configuration
and enable KDC + directory server to handle SIDs
3. use 'net conf setparm ...' to setup shares, since Samba on IPA master
uses registry backend to store smb.conf configuration.
See
http://www.freeipa.org/page/Howto/IPAv3_AD_trust_setup#Using_Samba_shares
for sample how to work with 'net conf setparm'.
For 'valid users' I guess you can use simply user names since these
would be our local ones.
Again, this is completely untested right now.
So, I tried quick test for this, using admins group:
1. Setup shared space, apply SELinux context and modify ACLs:
[root@red samba-4.0.5]# mkdir /srv/testshare
[root@red samba-4.0.5]# chcon -t samba_share_t /srv/testshare
[root@red samba-4.0.5]# setfacl -m g:admins:rwx /srv/testshare
[root@red samba-4.0.5]# getfacl /srv/testshare
getfacl: Removing leading '/' from absolute path names
# file: srv/testshare
# owner: root
# group: root
user::rwx
group::r-x
group:admins:rwx
mask::rwx
other::r-x
2. Create actual Samba share:
[root@red samba-4.0.5]# net conf addshare testshare /srv/testshare writeable=y
guest_ok=N
3. Obtain TGT for Kerberos identity (admin, belongs to admins group):
[root@red samba-4.0.5]# kinit
Password for admin@BIRD.CLONE:
[root@red samba-4.0.5]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: admin@BIRD.CLONE
Valid starting Expires Service principal
30.04.2013 22:10:13 01.05.2013 22:10:11 krbtgt/BIRD.CLONE@BIRD.CLONE
Now try connecting to //red.bird.clone/testshare and use it (I've copied
few files in several sessions, showing last one):
[root@red samba-4.0.5]# smbclient -k //red.bird.clone/testshare
lp_load_ex: changing to config backend registry
Domain=[BIRD] OS=[Unix] Server=[Samba 4.0.5]
smb: \> dir
. D 0 Tue Apr 30 22:06:51 2013
.. D 0 Tue Apr 30 21:40:04 2013
foobar.txt N 0 Tue Apr 30 21:51:54 2013
README A 7998 Tue Apr 30 22:06:51 2013
40918 blocks of size 262144. 19277 blocks available
smb: \> put WHATSNEW.txt
putting file WHATSNEW.txt as \WHATSNEW.txt (182,6 kb/s) (average 182,6 kb/s)
smb: \> dir
. D 0 Tue Apr 30 22:10:35 2013
.. D 0 Tue Apr 30 21:40:04 2013
WHATSNEW.txt A 47112 Tue Apr 30 22:10:35 2013
foobar.txt N 0 Tue Apr 30 21:51:54 2013
README A 7998 Tue Apr 30 22:06:51 2013
40918 blocks of size 262144. 19277 blocks available
smb: \>
Check status of the last copied file, notice permissions and SELinux
contet:
[root@red samba-4.0.5]# stat /srv/testshare/WHATSNEW.txt
File: ‘/srv/testshare/WHATSNEW.txt’
Size: 47112 Blocks: 96 IO Block: 4096 regular file
Device: fc03h/64515d Inode: 153050 Links: 1
Access: (0744/-rwxr--r--) Uid: (1564400000/ admin) Gid: (1564400000/
admins)
Context: system_u:object_r:samba_share_t:s0
Access: 2013-04-30 22:10:35.484270784 +0300
Modify: 2013-04-30 22:10:35.580239030 +0300
Change: 2013-04-30 22:10:35.579270116 +0300
Birth: -
--
/ Alexander Bokovoy
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