xguest_selinux(8)					xguest SELinux Policy documentation					 xguest_selinux(8)

NAME

       xguest_u - Least privledge xwindows user role. - Security Enhanced Linux Policy

DESCRIPTION

       xguest_u  is  an  SELinux  User	defined in the SELinux policy. SELinux users have default roles, xguest_r.  The default role has a default
       type, xguest_t, associated with it.

       The SELinux user will usually login to a system with a context that looks like:

       xguest_u:xguest_r:xguest_t:s0

       Linux users are automatically assigned an SELinux users at login.  Login programs use the SELinux User to assign  initial  context  to  the
       user's shell.

       SELinux policy uses the context to control the user's access.

       By default all users are assigned to the SELinux user via the __default__ flag

       On Targeted policy systems the __default__ user is assigned to the unconfined_u SELinux user.

       You can list all Linux User to SELinux user mapping using:

       semanage login -l

       If you wanted to change the default user mapping to use the xguest_u user, you would execute:

       semanage login -m -s xguest_u __default__

       If you want to map the one Linux user (joe) to the SELinux user xguest, you would execute:

       $ semanage login -a -s xguest_u joe

USER DESCRIPTION

       The  SELinux user xguest_u is defined in policy as a unprivileged user. SELinux prevents unprivileged users from doing administration tasks
       without transitioning to a different role.

SUDO

X WINDOWS LOGIN

       The SELinux user xguest_u is able to X Windows login.

NETWORK

       The SELinux user xguest_u is able to listen on the following tcp ports.

	      all ports with out defined types

	      32768-61000

       The SELinux user xguest_u is able to connect to the following tcp ports.

	      8955

	      53

	      111

	      32768-61000

	      8000,9433,16001

	      843,1935

	      9080

	      all ports < 1024

	      all ports with out defined types

	      389,636,3268,7389

	      88,750,4444

	      631,8610-8614

	      8081

	      8036

	      8080,8118,8123,10001-10010

	      80,81,443,488,8008,8009,8443,9000

	      21,989,990

	      4331,5001

	      4713

	      3128,3401,4827

       The SELinux user xguest_u is able to listen on the following udp ports.

	      all ports with out defined types

	      32768-61000

       The SELinux user xguest_u is able to connect to the following tcp ports.

	      8955

	      53

	      111

	      32768-61000

	      8000,9433,16001

	      843,1935

	      9080

	      all ports < 1024

	      all ports with out defined types

	      389,636,3268,7389

	      88,750,4444

	      631,8610-8614

	      8081

	      8036

	      8080,8118,8123,10001-10010

	      80,81,443,488,8008,8009,8443,9000

	      21,989,990

	      4331,5001

	      4713

	      3128,3401,4827

BOOLEANS

       SELinux policy is customizable based on least access required.  xguest policy is extremely flexible and has several booleans that allow you
       to manipulate the policy and run xguest with the tightest access possible.

       If  you	want  to  allow xguest users to configure Network Manager and connect to apache ports, you must turn on the xguest_connect_network
       boolean. Enabled by default.

       setsebool -P xguest_connect_network 1

       If you want to allow xguest users to mount removable media, you must turn on the xguest_mount_media boolean. Enabled by default.

       setsebool -P xguest_mount_media 1

       If you want to allow xguest to use blue tooth devices, you must turn on the xguest_use_bluetooth boolean. Enabled by default.

       setsebool -P xguest_use_bluetooth 1

       If you want to allow users to resolve user passwd entries directly from ldap rather then using a sssd server, you must turn on the  authlo-
       gin_nsswitch_use_ldap boolean. Disabled by default.

       setsebool -P authlogin_nsswitch_use_ldap 1

       If  you want to deny user domains applications to map a memory region as both executable and writable, this is dangerous and the executable
       should be reported in bugzilla, you must turn on the deny_execmem boolean. Enabled by default.

       setsebool -P deny_execmem 1

       If you want to deny any process from ptracing or debugging any other processes, you must  turn  on  the	deny_ptrace  boolean.  Enabled	by
       default.

       setsebool -P deny_ptrace 1

       If you want to allow all domains to use other domains file descriptors, you must turn on the domain_fd_use boolean. Enabled by default.

       setsebool -P domain_fd_use 1

       If  you	want  to  allow  all domains to have the kernel load modules, you must turn on the domain_kernel_load_modules boolean. Disabled by
       default.

       setsebool -P domain_kernel_load_modules 1

       If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

       setsebool -P fips_mode 1

       If you want to enable reading of urandom for all domains, you must turn on the global_ssp boolean. Disabled by default.

       setsebool -P global_ssp 1

       If you want to allow httpd cgi support, you must turn on the httpd_enable_cgi boolean. Enabled by default.

       setsebool -P httpd_enable_cgi 1

       If you want to unify HTTPD handling of all content files, you must turn on the httpd_unified boolean. Disabled by default.

       setsebool -P httpd_unified 1

       If you want to allow confined applications to run with kerberos, you must turn on the kerberos_enabled boolean. Enabled by default.

       setsebool -P kerberos_enabled 1

       If you want to allow logging in and using the system from /dev/console, you must turn on  the  login_console_enabled  boolean.  Enabled	by
       default.

       setsebool -P login_console_enabled 1

       If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

       setsebool -P nis_enabled 1

       If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Disabled by default.

       setsebool -P nscd_use_shm 1

       If  you	want  to  disallow  programs, such as newrole, from transitioning to administrative user domains, you must turn on the secure_mode
       boolean. Enabled by default.

       setsebool -P secure_mode 1

       If you want to allow regular users direct dri device access, you must  turn  on	the  selinuxuser_direct_dri_enabled  boolean.  Enabled	by
       default.

       setsebool -P selinuxuser_direct_dri_enabled 1

       If  you	want  to  allow unconfined executables to make their stack executable.	This should never, ever be necessary. Probably indicates a
       badly coded executable, but could indicate an attack. This executable should  be  reported  in  bugzilla,  you  must  turn  on  the  selin-
       uxuser_execstack boolean. Enabled by default.

       setsebool -P selinuxuser_execstack 1

       If  you	want  to  allow  user  to r/w files on filesystems that do not have extended attributes (FAT, CDROM, FLOPPY), you must turn on the
       selinuxuser_rw_noexattrfile boolean. Disabled by default.

       setsebool -P selinuxuser_rw_noexattrfile 1

       If you want to allow user  to use ssh chroot environment, you must turn on the selinuxuser_use_ssh_chroot boolean. Disabled by default.

       setsebool -P selinuxuser_use_ssh_chroot 1

       If you want to allow ssh logins as sysadm_r:sysadm_t, you must turn on the ssh_sysadm_login boolean. Disabled by default.

       setsebool -P ssh_sysadm_login 1

       If you want to support NFS home directories, you must turn on the use_nfs_home_dirs boolean. Disabled by default.

       setsebool -P use_nfs_home_dirs 1

       If you want to support SAMBA home directories, you must turn on the use_samba_home_dirs boolean. Disabled by default.

       setsebool -P use_samba_home_dirs 1

       If you want to allow the graphical login program to login directly as sysadm_r:sysadm_t, you must turn  on  the	xdm_sysadm_login  boolean.
       Enabled by default.

       setsebool -P xdm_sysadm_login 1

       If  you	want  to  allows clients to write to the X server shared memory segments, you must turn on the xserver_clients_write_xshm boolean.
       Disabled by default.

       setsebool -P xserver_clients_write_xshm 1

       If you want to support X userspace object manager, you must turn on the xserver_object_manager boolean. Enabled by default.

       setsebool -P xserver_object_manager 1

HOME_EXEC
       The SELinux user xguest_u is able execute home content files.

TRANSITIONS

       Three things can happen when xguest_t attempts to execute a program.

       1. SELinux Policy can deny xguest_t from executing the program.

       2. SELinux Policy can allow xguest_t to execute the program in the current user type.

	      Execute the following to see the types that the SELinux user xguest_t can execute without transitioning:

	      search -A -s xguest_t -c file -p execute_no_trans

       3. SELinux can allow xguest_t to execute the program and transition to a new type.

	      Execute the following to see the types that the SELinux user xguest_t can execute and transition:

	      $ search -A -s xguest_t -c process -p transition

MANAGED FILES

       The SELinux process type xguest_t can manage files labeled with the following file types.  The paths listed are the default paths for these
       file types.  Note the processes UID still need to have DAC permissions.

       anon_inodefs_t

       auth_cache_t

	    /var/cache/coolkey(/.*)?

       chrome_sandbox_tmpfs_t

       cifs_t

       httpd_user_content_t

	    /home/[^/]*/((www)|(web)|(public_html))(/.+)?

       httpd_user_htaccess_t

	    /home/[^/]*/((www)|(web)|(public_html))(/.*)?/.htaccess

       httpd_user_ra_content_t

	    /home/[^/]*/((www)|(web)|(public_html))(/.*)?/logs(/.*)?

       httpd_user_rw_content_t

       httpd_user_script_exec_t

	    /home/[^/]*/((www)|(web)|(public_html))/cgi-bin(/.+)?

       noxattrfs

	    all files on file systems which do not support extended attributes

       usbfs_t

       user_fonts_cache_t

	    /root/.fontconfig(/.*)?
	    /root/.fonts/auto(/.*)?
	    /root/.fonts.cache-.*
	    /home/[^/]*/.fontconfig(/.*)?
	    /home/[^/]*/.fonts/auto(/.*)?
	    /home/[^/]*/.fonts.cache-.*

       user_home_type

	    all user home files

       user_tmp_type

	    all user tmp files

       user_tmpfs_type

	    all user content in tmpfs file systems

       xdm_tmp_t

	    /tmp/.X11-unix(/.*)?
	    /tmp/.ICE-unix(/.*)?
	    /tmp/.X0-lock

       xserver_tmpfs_t

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 policy modules.

       semanage boolean can also be used to manipulate the booleans

       system-config-selinux is a GUI tool available to customize SELinux policy settings.

AUTHOR

       This manual page was auto-generated using sepolicy manpage .

SEE ALSO

       selinux(8),  xguest(8), semanage(8), restorecon(8), chcon(1), sepolicy(8) , setsebool(8), xguest_dbusd_selinux(8), xguest_dbusd_selinux(8),
       xguest_gkeyringd_selinux(8), xguest_gkeyringd_selinux(8)

mgrepl@redhat.com						      xguest							 xguest_selinux(8)