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
To make this change permanent (survive a relabel), use the semanage
command to add the change to file context configuration:
semanage fcontext -a -t samba_share_t "/var/eng(/.*)?"
This command adds the following entry to
/etc/selinux/POLICYTYPE/contexts/files/file_contexts.local:
/var/eng(/.*)? system_u:object_r:samba_share_t:s0
Run the restorecon command to apply the changes:
restorecon -R -v /var/eng/
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_content_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_content_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
system-config-selinux 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), semanage(8)