SELinux/samba

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

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/con‐ texts/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_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 bool‐ ean.

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 pol‐ icy settings.

AUTHOR This manual page was written by Dan Walsh .

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

dwalsh@redhat.com                22 Nov 2011                 samba_selinux(8)