guest_selinux(8)

1guest_selinux(8)      guest SELinux Policy documentation      guest_selinux(8)
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NAME

6       guest_u  -  Least  privileged  terminal  user role. - Security Enhanced
7       Linux Policy
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DESCRIPTION

11       guest_u is an SELinux User defined in the SELinux policy. SELinux users
12       have  default  roles,  guest_r.   The  default role has a default type,
13       guest_t, associated with it.
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15       The SELinux user will usually login to a system  with  a  context  that
16       looks like:
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18       guest_u:guest_r:guest_t:s0
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20       Linux  users are automatically assigned an SELinux users at login.  Lo‐
21       gin programs use the SELinux User to  assign  initial  context  to  the
22       user's shell.
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24       SELinux policy uses the context to control the user's access.
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26       By  default  all  users  are assigned to the SELinux user via the __de‐
27       fault__ flag
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29       On Targeted policy systems the __default__ user is assigned to the  un‐
30       confined_u SELinux user.
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32       You can list all Linux User to SELinux user mapping using:
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34       semanage login -l
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36       If  you  wanted  to  change the default user mapping to use the guest_u
37       user, you would execute:
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39       semanage login -m -s guest_u __default__
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42       If you want to map the one Linux user (joe) to the SELinux user  guest,
43       you would execute:
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45       $ semanage login -a -s guest_u joe
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USER DESCRIPTION

50       The  SELinux  user guest_u is defined in policy as a unprivileged user.
51       SELinux prevents unprivileged users  from  doing  administration  tasks
52       without transitioning to a different role.
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SUDO

X WINDOWS LOGIN

57       The SELinux user guest_u is not able to X Windows login.
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NETWORK

61       The SELinux user guest_u is able to listen on the following tcp ports.
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63              1716
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66       The SELinux user guest_u is able to connect to the following tcp ports.
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68              9080
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70              88,750,4444
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73       The SELinux user guest_u is able to connect to the following tcp ports.
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75              9080
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77              88,750,4444
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BOOLEANS

81       SELinux  policy  is customizable based on least access required.  guest
82       policy is extremely flexible and has several booleans that allow you to
83       manipulate the policy and run guest with the tightest access possible.
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87       If  you  want to deny all system processes and Linux users to use blue‐
88       tooth wireless technology, you must turn on the deny_bluetooth boolean.
89       Enabled by default.
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91       setsebool -P deny_bluetooth 1
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95       If you want to deny user domains applications to map a memory region as
96       both executable and writable, this  is  dangerous  and  the  executable
97       should be reported in bugzilla, you must turn on the deny_execmem bool‐
98       ean. Enabled by default.
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100       setsebool -P deny_execmem 1
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104       If you want to allow all domains to execute in fips_mode, you must turn
105       on the fips_mode boolean. Enabled by default.
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107       setsebool -P fips_mode 1
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111       If  you want to allow httpd cgi support, you must turn on the httpd_en‐
112       able_cgi boolean. Enabled by default.
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114       setsebool -P httpd_enable_cgi 1
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118       If you want to allow confined applications to run  with  kerberos,  you
119       must turn on the kerberos_enabled boolean. Enabled by default.
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121       setsebool -P kerberos_enabled 1
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125       If  you  want  to allow unconfined executables to make their stack exe‐
126       cutable.  This should never, ever be necessary.  Probably  indicates  a
127       badly  coded  executable, but could indicate an attack. This executable
128       should be reported in bugzilla, you must turn on the  selinuxuser_exec‐
129       stack boolean. Enabled by default.
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131       setsebool -P selinuxuser_execstack 1
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135       If you want to allow user  to use ssh chroot environment, you must turn
136       on the selinuxuser_use_ssh_chroot boolean. Disabled by default.
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138       setsebool -P selinuxuser_use_ssh_chroot 1
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142       If you want to support NFS home  directories,  you  must  turn  on  the
143       use_nfs_home_dirs boolean. Disabled by default.
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145       setsebool -P use_nfs_home_dirs 1
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149       If  you  want  to  support SAMBA home directories, you must turn on the
150       use_samba_home_dirs boolean. Disabled by default.
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152       setsebool -P use_samba_home_dirs 1
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HOME_EXEC

157       The SELinux user guest_u is able execute home content files.
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TRANSITIONS

161       Three things can happen when guest_t attempts to execute a program.
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163       1. SELinux Policy can deny guest_t from executing the program.
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167       2. SELinux Policy can allow guest_t to execute the program in the  cur‐
168       rent user type.
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170              Execute  the  following  to  see the types that the SELinux user
171              guest_t can execute without transitioning:
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173              sesearch -A -s guest_t -c file -p execute_no_trans
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177       3. SELinux can allow guest_t to execute the program and transition to a
178       new type.
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180              Execute  the  following  to  see the types that the SELinux user
181              guest_t can execute and transition:
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183              $ sesearch -A -s guest_t -c process -p transition
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MANAGED FILES

188       The SELinux process type guest_t can manage files labeled with the fol‐
189       lowing  file  types.   The paths listed are the default paths for these
190       file types.  Note the processes UID still need to have DAC permissions.
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192       alsa_home_t
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194            /home/[^/]+/.asoundrc
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196       auth_cache_t
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198            /var/cache/coolkey(/.*)?
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200       cifs_t
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203       httpd_user_content_t
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205            /home/[^/]+/((www)|(web)|(public_html))(/.+)?
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207       httpd_user_htaccess_t
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209            /home/[^/]+/((www)|(web)|(public_html))(/.*)?/.htaccess
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211       httpd_user_ra_content_t
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213            /home/[^/]+/((www)|(web)|(public_html))(/.*)?/logs(/.*)?
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215       httpd_user_rw_content_t
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218       httpd_user_script_exec_t
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220            /home/[^/]+/((www)|(web)|(public_html))/cgi-bin(/.+)?
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222       nfs_t
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225       pkcs_slotd_tmpfs_t
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227            /dev/shm/var.lib.opencryptoki.*
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229       user_home_type
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231            all user home files
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233       user_tmp_type
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235            all user tmp files
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COMMANDS

239       semanage fcontext can also be used to manipulate default  file  context
240       mappings.
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242       semanage  permissive  can  also  be used to manipulate whether or not a
243       process type is permissive.
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245       semanage module can also be used to enable/disable/install/remove  pol‐
246       icy modules.
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248       semanage boolean can also be used to manipulate the booleans
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251       system-config-selinux is a GUI tool available to customize SELinux pol‐
252       icy settings.
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AUTHOR

256       This manual page was auto-generated using sepolicy manpage .
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