samba_selinux(8) samba SELinux Policy documentation samba_selinux(8)NAMEsamba_selinux - Security Enhanced Linux Policy for the samba processes
DESCRIPTION
Security-Enhanced Linux secures the samba processes via flexible manda‐
tory access control.
BOOLEANS
SELinux policy is customizable based on least access required. samba
policy is extremely flexible and has several booleans that allow you to
manipulate the policy and run samba with the tightest access possible.
If you want to allow samba to act as the domain controller, add users,
groups and change passwords, you must turn on the samba_domain_con‐
troller boolean.
setsebool -P samba_domain_controller 1
If you want to allow samba to act as a portmappe, you must turn on the
samba_portmapper boolean.
setsebool -P samba_portmapper 1
If you want to allow samba to share any file/directory read only, you
must turn on the samba_export_all_ro boolean.
setsebool -P samba_export_all_ro 1
If you want to support SAMBA home directorie, you must turn on the
use_samba_home_dirs boolean.
setsebool -P use_samba_home_dirs 1
If you want to allow samba to create new home directories (e.g. via
PAM, you must turn on the samba_create_home_dirs boolean.
setsebool -P samba_create_home_dirs 1
If you want to allow samba to share users home directories, you must
turn on the samba_enable_home_dirs boolean.
setsebool -P samba_enable_home_dirs 1
If you want to allow samba to export ntfs/fusefs volumes, you must turn
on the samba_share_fusefs boolean.
setsebool -P samba_share_fusefs 1
If you want to allow samba to export NFS volumes, you must turn on the
samba_share_nfs boolean.
setsebool -P samba_share_nfs 1
If you want to allow samba to run unconfined script, you must turn on
the samba_run_unconfined boolean.
setsebool -P samba_run_unconfined 1
If you want to allow sanlock to manage cifs file, you must turn on the
sanlock_use_samba boolean.
setsebool -P sanlock_use_samba 1
If you want to allow samba to share any file/directory read/write, you
must turn on the samba_export_all_rw boolean.
setsebool -P samba_export_all_rw 1
If you want to allow confined virtual guests to manage cifs file, you
must turn on the virt_use_samba boolean.
setsebool -P virt_use_samba 1
NSSWITCH DOMAIN
If you want to allow users to login using a sssd serve for the
samba_net_t, sambagui_t, you must turn on the authlogin_nss‐
witch_use_ldap boolean.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to allow confined applications to run with kerberos for the
samba_net_t, sambagui_t, you must turn on the allow_kerberos boolean.
setsebool -P allow_kerberos 1
If you want to allow system to run with NI for the samba_net_t, sam‐
bagui_t, you must turn on the allow_ypbind boolean.
setsebool -P allow_ypbind 1
FILE CONTEXTS
SELinux requires files to have an extended attribute to define the file
type.
You can see the context of a file using the -Z option to ls
Policy governs the access confined processes have to these files.
SELinux samba policy is very flexible allowing users to setup their
samba processes in as secure a method as possible.
The following file types are defined for samba:
samba_etc_t
- Set files with the samba_etc_t type, if you want to store samba files
in the /etc directories.
samba_initrc_exec_t
- Set files with the samba_initrc_exec_t type, if you want to transi‐
tion an executable to the samba_initrc_t domain.
Paths:
/etc/rc.d/init.d/nmb, /etc/rc.d/init.d/smb, /etc/rc.d/init.d/win‐
bind
samba_log_t
- Set files with the samba_log_t type, if you want to treat the data as
samba log data, usually stored under the /var/log directory.
samba_net_exec_t
- Set files with the samba_net_exec_t type, if you want to transition
an executable to the samba_net_t domain.
samba_net_tmp_t
- Set files with the samba_net_tmp_t type, if you want to store samba
net temporary files in the /tmp directories.
samba_secrets_t
- Set files with the samba_secrets_t type, if you want to treat the
files as samba secrets data.
Paths:
/etc/samba/secrets.tdb, /etc/samba/passdb.tdb,
/etc/samba/MACHINE.SID, /etc/samba/smbpasswd
samba_share_t
- Set files with the samba_share_t type, if you want to treat the files
as samba share data.
samba_unconfined_script_exec_t
- Set files with the samba_unconfined_script_exec_t type, if you want
to transition an executable to the samba_unconfined_script_t domain.
samba_unit_file_t
- Set files with the samba_unit_file_t type, if you want to treat the
files as samba unit content.
Paths:
/usr/lib/systemd/system/smb.*, /usr/lib/systemd/system/nmb.*
samba_var_t
- Set files with the samba_var_t type, if you want to store the s files
under the /var directory.
Paths:
/var/spool/samba(/.*)?, /var/cache/samba(/.*)?,
/var/lib/samba(/.*)?
sambagui_exec_t
- Set files with the sambagui_exec_t type, if you want to transition an
executable to the sambagui_t domain.
Note: File context can be temporarily modified with the chcon command.
If you want to permanantly change the file context you need to use the
semanage fcontext command. This will modify the SELinux labeling data‐
base. You will need to use restorecon to apply the labels.
PROCESS TYPES
SELinux defines process types (domains) for each process running on the
system
You can see the context of a process using the -Z option to ps
Policy governs the access confined processes have to files. SELinux
samba policy is very flexible allowing users to setup their samba pro‐
cesses in as secure a method as possible.
The following process types are defined for samba:
samba_net_t, samba_unconfined_script_t, sambagui_t
Note: semanage permissive -a PROCESS_TYPE can be used to make a process
type permissive. Permissive process types are not denied access by
SELinux. AVC messages will still be generated.
COMMANDS
semanage fcontext can also be used to manipulate default file context
mappings.
semanage permissive can also be used to manipulate whether or not a
process type is permissive.
semanage module can also be used to enable/disable/install/remove pol‐
icy modules.
semanage boolean can also be used to manipulate the booleans
system-config-selinux is a GUI tool available to customize SELinux pol‐
icy settings.
AUTHOR
This manual page was autogenerated by genman.py.
SEE ALSOselinux(8), samba(8), semanage(8), restorecon(8), chcon(1) , setse‐
bool(8)dwalsh@redhat.com samba samba_selinux(8)
