system_selinux(8) system SELinux Policy documentation system_selinux(8)NAMEsystem_selinux - Security Enhanced Linux Policy for the system pro‐
cesses
DESCRIPTION
Security-Enhanced Linux secures the system processes via flexible
mandatory access control.
BOOLEANS
SELinux policy is customizable based on least access required. system
policy is extremely flexible and has several booleans that allow you to
manipulate the policy and run system with the tightest access possible.
If you want to allow Git daemon system to access cifs file systems, you
must turn on the git_system_use_cifs boolean.
setsebool -P git_system_use_cifs 1
If you want to allow Git daemon system to search home directories, you
must turn on the git_system_enable_homedirs boolean.
setsebool -P git_system_enable_homedirs 1
If you want to allow Git daemon system to access nfs file systems, you
must turn on the git_system_use_nfs boolean.
setsebool -P git_system_use_nfs 1
If you want to allow clamscan to non security files on a syste, you
must turn on the clamscan_can_scan_system boolean.
setsebool -P clamscan_can_scan_system 1
If you want to enable support for systemd as the init program, you must
turn on the init_systemd boolean.
setsebool -P init_systemd 1
NSSWITCH DOMAIN
If you want to allow users to login using a sssd serve for the sys‐
tem_cronjob_t, systemd_notify_t, systemd_logind_t, system_dbusd_t, sys‐
temd_passwd_agent_t, systemd_logger_t, systemd_tmpfiles_t, sys‐
tem_mail_t, you must turn on the authlogin_nsswitch_use_ldap boolean.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to allow confined applications to run with kerberos for the
system_cronjob_t, systemd_notify_t, systemd_logind_t, system_dbusd_t,
systemd_passwd_agent_t, systemd_logger_t, systemd_tmpfiles_t, sys‐
tem_mail_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 system_cronjob_t,
systemd_notify_t, systemd_logind_t, system_dbusd_t, sys‐
temd_passwd_agent_t, systemd_logger_t, systemd_tmpfiles_t, sys‐
tem_mail_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 system policy is very flexible allowing users to setup their
system processes in as secure a method as possible.
The following file types are defined for system:
system_conf_t
- Set files with the system_conf_t type, if you want to treat the files
as system configuration data, usually stored under the /etc directory.
Paths:
/etc/sysctl.conf(.old)?, /etc/sysconfig/ipvsadm.*, /etc/syscon‐
fig/ebtables.*, /etc/sysconfig/ip6?tables.*, /etc/sysconfig/sys‐
tem-config-firewall.*
system_cron_spool_t
- Set files with the system_cron_spool_t type, if you want to store the
system cron files under the /var/spool directory.
Paths:
/etc/crontab, /var/spool/anacron(/.*)?, /etc/cron.d(/.*)?,
/var/spool/fcron/systab.orig, /var/spool/fcron/new.systab,
/var/spool/fcron/systab
system_cronjob_lock_t
- Set files with the system_cronjob_lock_t type, if you want to treat
the files as system cronjob lock data, stored under the /var/lock
directory
system_cronjob_tmp_t
- Set files with the system_cronjob_tmp_t type, if you want to store
system cronjob temporary files in the /tmp directories.
system_cronjob_var_lib_t
- Set files with the system_cronjob_var_lib_t type, if you want to
store the system cronjob files under the /var/lib directory.
system_cronjob_var_run_t
- Set files with the system_cronjob_var_run_t type, if you want to
store the system cronjob files under the /run directory.
system_dbusd_tmp_t
- Set files with the system_dbusd_tmp_t type, if you want to store sys‐
tem dbusd temporary files in the /tmp directories.
system_dbusd_var_lib_t
- Set files with the system_dbusd_var_lib_t type, if you want to store
the system dbusd files under the /var/lib directory.
system_dbusd_var_run_t
- Set files with the system_dbusd_var_run_t type, if you want to store
the system dbusd files under the /run directory.
Paths:
/var/named/chroot/var/run/dbus(/.*)?, /var/run/dbus(/.*)?
system_mail_tmp_t
- Set files with the system_mail_tmp_t type, if you want to store sys‐
tem mail temporary files in the /tmp directories.
system_map_t
- Set files with the system_map_t type, if you want to treat the files
as system map data.
Paths:
/boot/System.map(-.*)?, /boot/efi(/.*)?/System.map(-.*)?
system_munin_plugin_exec_t
- Set files with the system_munin_plugin_exec_t type, if you want to
transition an executable to the system_munin_plugin_t domain.
Paths:
/usr/share/munin/plugins/proc_pri, /usr/share/munin/plugins/swap,
/usr/share/munin/plugins/interrupts, /usr/share/munin/plug‐
ins/cpu.*, /usr/share/munin/plugins/yum, /usr/share/munin/plug‐
ins/load, /usr/share/munin/plugins/irqstats,
/usr/share/munin/plugins/processes, /usr/share/munin/plug‐
ins/iostat.*, /usr/share/munin/plugins/nfs.*,
/usr/share/munin/plugins/munin_.*, /usr/share/munin/plugins/mem‐
ory, /usr/share/munin/plugins/threads, /usr/share/munin/plug‐
ins/netstat, /usr/share/munin/plugins/acpi, /usr/share/munin/plug‐
ins/forks, /usr/share/munin/plugins/uptime, /usr/share/munin/plug‐
ins/users, /usr/share/munin/plugins/if_.*, /usr/share/munin/plug‐
ins/open_files
system_munin_plugin_tmp_t
- Set files with the system_munin_plugin_tmp_t type, if you want to
store system munin plugin temporary files in the /tmp directories.
systemd_logger_exec_t
- Set files with the systemd_logger_exec_t type, if you want to transi‐
tion an executable to the systemd_logger_t domain.
systemd_logind_exec_t
- Set files with the systemd_logind_exec_t type, if you want to transi‐
tion an executable to the systemd_logind_t domain.
systemd_logind_sessions_t
- Set files with the systemd_logind_sessions_t type, if you want to
treat the files as systemd logind sessions data.
systemd_logind_var_run_t
- Set files with the systemd_logind_var_run_t type, if you want to
store the systemd logind files under the /run directory.
Paths:
/var/run/nologin, /var/run/systemd/users(/.*)?, /var/run/sys‐
temd/seats(/.*)?
systemd_notify_exec_t
- Set files with the systemd_notify_exec_t type, if you want to transi‐
tion an executable to the systemd_notify_t domain.
Paths:
/usr/bin/systemd-notify, /bin/systemd-notify
systemd_passwd_agent_exec_t
- Set files with the systemd_passwd_agent_exec_t type, if you want to
transition an executable to the systemd_passwd_agent_t domain.
Paths:
/bin/systemd-tty-ask-password-agent, /usr/bin/systemd-gnome-ask-
password-agent, /usr/bin/systemd-tty-ask-password-agent
systemd_passwd_var_run_t
- Set files with the systemd_passwd_var_run_t type, if you want to
store the systemd passwd files under the /run directory.
Paths:
/var/run/systemd/ask-password(/.*)?, /var/run/systemd/ask-pass‐
word-block(/.*)?
systemd_systemctl_exec_t
- Set files with the systemd_systemctl_exec_t type, if you want to
transition an executable to the systemd_systemctl_t domain.
Paths:
/usr/bin/systemctl, /bin/systemctl
systemd_tmpfiles_exec_t
- Set files with the systemd_tmpfiles_exec_t type, if you want to tran‐
sition an executable to the systemd_tmpfiles_t domain.
Paths:
/usr/bin/systemd-tmpfiles, /bin/systemd-tmpfiles, /usr/lib/sys‐
temd/systemd-tmpfiles
systemd_unit_file_t
- Set files with the systemd_unit_file_t type, if you want to treat the
files as systemd unit content.
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
system policy is very flexible allowing users to setup their system
processes in as secure a method as possible.
The following process types are defined for system:
system_munin_plugin_t, systemd_logger_t, systemd_logind_t, system_cronjob_t, systemd_notify_t, system_mail_t, systemd_passwd_agent_t, system_dbusd_t, systemd_tmpfiles_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), system(8), semanage(8), restorecon(8), chcon(1) , setse‐
bool(8)dwalsh@redhat.com system system_selinux(8)
