SELinux/samba

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samba_selinux(8)      Samba Selinux Policy documentation      samba_selinux(8)

NAME
samba_selinux - Security Enhanced Linux Policy for Samba

DESCRIPTION
Security-Enhanced Linux secures the Samba server via flexible mandatory
access control.

FILE_CONTEXTS
SELinux requires files to have an extended attribute to define the file
type.   Policy  governs the access daemons have to these files.  If you
want to share files other than home directories, those  files  must  be
labeled samba_share_t.  So if you created a special directory /var/eng,
you would need to label the directory with the chcon tool.

chcon -t samba_share_t /var/eng

If you want to make this permanant, i.e. survive a  relabel,  you  must
add an entry to the file_contexts.local file.

/etc/selinux/POLICYTYPE/contexts/files/file_contexts.local
/var/eng(/.*)? system_u:object_r:samba_share_t

SHARING FILES
If you want to share files with multiple domains (Apache,  FTP,  rsync,
Samba),  you can set a file context of public_content_t and public_con-
tent_rw_t.  These context allow any of the above domains  to  read  the
content.   If  you want a particular domain to write to the public_con-
tent_rw_t   domain,   you   must   set   the    appropriate    boolean.
allow_DOMAIN_anon_write.  So for samba you would execute:

setsebool -P allow_smbd_anon_write=1

BOOLEANS
SELinux  policy  is customizable based on least access required.  So by
default SElinux policy turns off SELinux sharing  of  home  directories
and  the use of Samba shares from a remote machine as a home directory.

If you are setting up this machine as a Samba server and wish to  share
the  home  directories,  you  need  to  set  the samba_enable_home_dirs
boolean.

setsebool -P samba_enable_home_dirs 1

If you want to use a remote Samba server for the  home  directories  on
this machine, you must set the use_samba_home_dirs boolean.

setsebool -P use_samba_home_dirs 1

You can disable SELinux protection for the samba daemon by executing:

setsebool -P smbd_disable_trans 1
service smb restart

system-config-securitylevel  is  a  GUI  tool  available  to  customize
SELinux policy settings.

AUTHOR
This manual page was written by Dan Walsh <dwalsh@redhat.com>.

SEE ALSO
selinux(8), samba(7), chcon(1), setsebool(8)

dwalsh@redhat.com                 17 Jan 2005                 samba_selinux(8)