3.3. Booleans
SELinux is based on the least level of access required for a service to run. Services can be run in a variety of ways; therefore, you need to specify how you run your services. Use the following Booleans to set up SELinux:
allow_smbd_anon_write- Having this Boolean enabled allows
smbdto write to a public directory, such as an area reserved for common files that otherwise has no special access restrictions. samba_create_home_dirs- Having this Boolean enabled allows Samba to create new home directories independently. This is often done by mechanisms such as PAM.
samba_domain_controller- When enabled, this Boolean allows Samba to act as a domain controller, as well as giving it permission to execute related commands such as
useradd,groupaddandpasswd. samba_enable_home_dirs- Enabling this Boolean allows Samba to share users' home directories.
samba_export_all_ro- Export any file or directory, allowing read-only permissions. This allows files and directories that are not labeled with the
samba_share_ttype to be shared through Samba. When thesamba_export_all_roBoolean is on, but thesamba_export_all_rwBoolean is off, write access to Samba shares is denied, even if write access is configured in/etc/samba/smb.conf, as well as Linux permissions allowing write access. samba_export_all_rw- Export any file or directory, allowing read and write permissions. This allows files and directories that are not labeled with the
samba_share_ttype to be exported through Samba. Permissions in/etc/samba/smb.confand Linux permissions must be configured to allow write access. samba_run_unconfined- Having this Boolean enabled allows Samba to run unconfined scripts in the
/var/lib/samba/scripts/directory. samba_share_fusefs- This Boolean must be enabled for Samba to share fusefs file systems.
samba_share_nfs- Disabling this Boolean prevents
smbdfrom having full access to NFS shares via Samba. Enabling this Boolean will allow Samba to share NFS volumes. use_samba_home_dirs- Enable this Boolean to use a remote server for Samba home directories.
virt_use_samba- Allow virtual machine access to CIFS files.
Note
Due to the continuous development of the SELinux policy, the list above might not contain all Booleans related to the service at all times. To list them, run the following command as root:
~]# semanage boolean -l | grep service_name