sysadm_selinux(8)

1sysadm_selinux(8)     sysadm SELinux Policy documentation    sysadm_selinux(8)
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NAME

6       sysadm_u - General system administration role - Security Enhanced Linux
7       Policy
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DESCRIPTION

11       sysadm_u is an SELinux User defined  in  the  SELinux  policy.  SELinux
12       users  have  default  roles,  sysadm_r.  The default role has a default
13       type, sysadm_t, associated with it.
14
15       The SELinux user will usually login to a system  with  a  context  that
16       looks like:
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18       sysadm_u:sysadm_r:sysadm_t:s0 - s0:c0.c1023
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20       Linux  users  are  automatically  assigned  an  SELinux users at login.
21       Login 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
27       __default__ flag
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29       On Targeted policy systems the __default__  user  is  assigned  to  the
30       unconfined_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 sysadm_u
37       user, you would execute:
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39       semanage login -m -s sysadm_u __default__
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41
42       If you want to map the one Linux user (joe) to the SELinux user sysadm,
43       you would execute:
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45       $ semanage login -a -s sysadm_u joe
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USER DESCRIPTION

50       The  SELinux  user  sysadm_u  is  an admin user. It means that a mapped
51       Linux user to this SELinux user is intended for administrative actions.
52       Usually this is assigned to a root Linux user.
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SUDO

56       The SELinux user sysadm can execute sudo.
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58       You  can set up sudo to allow sysadm to transition to an administrative
59       domain:
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61       Add one or more of the following record to sudoers using visudo.
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64       USERNAME ALL=(ALL) ROLE=user_r TYPE=user_t COMMAND
65       sudo will run COMMAND as sysadm_u:user_r:user_t:LEVEL
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67       You might also need to add one or more  of  these  new  roles  to  your
68       SELinux user record.
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70       List the SELinux roles your SELinux user can reach by executing:
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72       $ semanage user -l |grep selinux_name
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74       Modify the roles list and add sysadm_r to this list.
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76       $  semanage  user  -m  -R 'sysadm_r user_r staff_r secadm_r auditadm_r'
77       sysadm_u
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79       For more details you can see semanage man page.
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82       USERNAME ALL=(ALL) ROLE=staff_r TYPE=staff_t COMMAND
83       sudo will run COMMAND as sysadm_u:staff_r:staff_t:LEVEL
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85       You might also need to add one or more  of  these  new  roles  to  your
86       SELinux user record.
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88       List the SELinux roles your SELinux user can reach by executing:
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90       $ semanage user -l |grep selinux_name
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92       Modify the roles list and add sysadm_r to this list.
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94       $  semanage  user  -m  -R 'sysadm_r user_r staff_r secadm_r auditadm_r'
95       sysadm_u
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97       For more details you can see semanage man page.
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100       USERNAME ALL=(ALL) ROLE=secadm_r TYPE=secadm_t COMMAND
101       sudo will run COMMAND as sysadm_u:secadm_r:secadm_t:LEVEL
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103       You might also need to add one or more  of  these  new  roles  to  your
104       SELinux user record.
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106       List the SELinux roles your SELinux user can reach by executing:
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108       $ semanage user -l |grep selinux_name
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110       Modify the roles list and add sysadm_r to this list.
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112       $  semanage  user  -m  -R 'sysadm_r user_r staff_r secadm_r auditadm_r'
113       sysadm_u
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115       For more details you can see semanage man page.
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118       USERNAME ALL=(ALL) ROLE=auditadm_r TYPE=auditadm_t COMMAND
119       sudo will run COMMAND as sysadm_u:auditadm_r:auditadm_t:LEVEL
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121       You might also need to add one or more  of  these  new  roles  to  your
122       SELinux user record.
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124       List the SELinux roles your SELinux user can reach by executing:
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126       $ semanage user -l |grep selinux_name
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128       Modify the roles list and add sysadm_r to this list.
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130       $  semanage  user  -m  -R 'sysadm_r user_r staff_r secadm_r auditadm_r'
131       sysadm_u
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133       For more details you can see semanage man page.
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136       The SELinux type sysadm_t is not allowed to execute sudo.
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138

X WINDOWS LOGIN

140       The SELinux user sysadm_u is able to X Windows login.
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NETWORK

144       The SELinux user sysadm_u is able to listen on the following tcp ports.
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146              32768-60999
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148              all ports with out defined types
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150              389,636,3268,3269,7389
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152              all ports > 1024
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155       The SELinux user sysadm_u is able  to  connect  to  the  following  tcp
156       ports.
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158              8955
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160              53,853
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162              all ports
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164              389,636,3268,3269,7389
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166              all ports with out defined types
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168              32768-60999
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170              all ports < 1024
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172              9080
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174              88,750,4444
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177       The SELinux user sysadm_u is able to listen on the following udp ports.
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179              32768-60999
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181              all ports with out defined types
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183              123
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185              all ports > 1024
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188       The  SELinux  user  sysadm_u  is  able  to connect to the following tcp
189       ports.
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191              8955
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193              53,853
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195              all ports
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197              389,636,3268,3269,7389
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199              all ports with out defined types
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201              32768-60999
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203              all ports < 1024
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205              9080
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207              88,750,4444
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BOOLEANS

211       SELinux policy is customizable based on least access required.   sysadm
212       policy is extremely flexible and has several booleans that allow you to
213       manipulate the policy and run sysadm with the tightest access possible.
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217       If you want to determine whether crond can execute  jobs  in  the  user
218       domain  as  opposed to the the generic cronjob domain, you must turn on
219       the cron_userdomain_transition boolean. Enabled by default.
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221       setsebool -P cron_userdomain_transition 1
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225       If you want to deny all system processes and Linux users to  use  blue‐
226       tooth wireless technology, you must turn on the deny_bluetooth boolean.
227       Enabled by default.
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229       setsebool -P deny_bluetooth 1
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233       If you want to deny user domains applications to map a memory region as
234       both  executable  and  writable,  this  is dangerous and the executable
235       should be reported in bugzilla, you must turn on the deny_execmem bool‐
236       ean. Enabled by default.
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238       setsebool -P deny_execmem 1
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242       If  you  want  to deny any process from ptracing or debugging any other
243       processes, you  must  turn  on  the  deny_ptrace  boolean.  Enabled  by
244       default.
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246       setsebool -P deny_ptrace 1
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250       If you want to allow all domains to execute in fips_mode, you must turn
251       on the fips_mode boolean. Enabled by default.
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253       setsebool -P fips_mode 1
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257       If you want to determine whether calling user domains can  execute  Git
258       daemon  in  the  git_session_t  domain,  you  must turn on the git_ses‐
259       sion_users boolean. Disabled by default.
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261       setsebool -P git_session_users 1
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265       If you want to determine  whether  calling  user  domains  can  execute
266       Polipo  daemon  in  the  polipo_session_t  domain, you must turn on the
267       polipo_session_users boolean. Disabled by default.
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269       setsebool -P polipo_session_users 1
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273       If you want to allow unconfined executables to make  their  stack  exe‐
274       cutable.   This  should  never, ever be necessary. Probably indicates a
275       badly coded executable, but could indicate an attack.  This  executable
276       should  be reported in bugzilla, you must turn on the selinuxuser_exec‐
277       stack boolean. Disabled by default.
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279       setsebool -P selinuxuser_execstack 1
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283       If you want to allow user to r/w files on filesystems that do not  have
284       extended  attributes  (FAT, CDROM, FLOPPY), you must turn on the selin‐
285       uxuser_rw_noexattrfile boolean. Disabled by default.
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287       setsebool -P selinuxuser_rw_noexattrfile 1
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291       If you want to allow users to run TCP servers (bind to ports and accept
292       connection  from  the  same  domain  and outside users)  disabling this
293       forces FTP passive mode and may change other protocols, you  must  turn
294       on the selinuxuser_tcp_server boolean. Disabled by default.
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296       setsebool -P selinuxuser_tcp_server 1
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300       If you want to allow users to run UDP servers (bind to ports and accept
301       connection from the same domain and outside users)  disabling this  may
302       break  avahi  discovering services on the network and other udp related
303       services, you must turn on the selinuxuser_udp_server boolean. Disabled
304       by default.
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306       setsebool -P selinuxuser_udp_server 1
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309
310       If  you  want  to  support  NFS  home directories, you must turn on the
311       use_nfs_home_dirs boolean. Enabled by default.
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313       setsebool -P use_nfs_home_dirs 1
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317       If you want to support SAMBA home directories, you  must  turn  on  the
318       use_samba_home_dirs boolean. Disabled by default.
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320       setsebool -P use_samba_home_dirs 1
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HOME_EXEC

325       The SELinux user sysadm_u is able execute home content files.
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TRANSITIONS

329       Three things can happen when sysadm_t attempts to execute a program.
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331       1. SELinux Policy can deny sysadm_t from executing the program.
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335       2. SELinux Policy can allow sysadm_t to execute the program in the cur‐
336       rent user type.
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338              Execute the following to see the types  that  the  SELinux  user
339              sysadm_t can execute without transitioning:
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341              sesearch -A -s sysadm_t -c file -p execute_no_trans
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345       3.  SELinux can allow sysadm_t to execute the program and transition to
346       a new type.
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348              Execute the following to see the types  that  the  SELinux  user
349              sysadm_t can execute and transition:
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351              $ sesearch -A -s sysadm_t -c process -p transition
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MANAGED FILES

356       The  SELinux  process  type  sysadm_t can manage files labeled with the
357       following file types.  The paths listed are the default paths for these
358       file types.  Note the processes UID still need to have DAC permissions.
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360       auditd_etc_t
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362            /etc/audit(/.*)?
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364       auditd_log_t
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366            /var/log/audit(/.*)?
367            /var/log/audit.log.*
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369       boolean_type
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372       cgroup_t
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374            /sys/fs/cgroup
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376       krb5_keytab_t
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378            /var/kerberos/krb5(/.*)?
379            /etc/krb5.keytab
380            /etc/krb5kdc/kadm5.keytab
381            /var/kerberos/krb5kdc/kadm5.keytab
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383       non_security_file_type
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386       security_t
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388            /selinux
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390       selinux_login_config_t
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392            /etc/selinux/([^/]*/)?logins(/.*)?
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394       semanage_store_t
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396            /etc/selinux/([^/]*/)?policy(/.*)?
397            /etc/selinux/(minimum|mls|targeted)/active(/.*)?
398            /etc/selinux/([^/]*/)?modules/(active|tmp|previous)(/.*)?
399            /var/lib/selinux(/.*)?
400            /etc/share/selinux/mls(/.*)?
401            /etc/share/selinux/targeted(/.*)?
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403       usbfs_t
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405
406       user_fonts_cache_t
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408            /root/.fontconfig(/.*)?
409            /root/.fonts/auto(/.*)?
410            /root/.fonts.cache-.*
411            /root/.cache/fontconfig(/.*)?
412            /home/[^/]+/.fontconfig(/.*)?
413            /home/[^/]+/.fonts/auto(/.*)?
414            /home/[^/]+/.fonts.cache-.*
415            /home/[^/]+/.cache/fontconfig(/.*)?
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417       var_auth_t
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419            /var/ace(/.*)?
420            /var/rsa(/.*)?
421            /var/lib/abl(/.*)?
422            /var/lib/rsa(/.*)?
423            /var/lib/pam_ssh(/.*)?
424            /var/lib/pam_shield(/.*)?
425            /var/opt/quest/vas/vasd(/.*)?
426            /var/lib/google-authenticator(/.*)?
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COMMANDS

430       semanage  fcontext  can also be used to manipulate default file context
431       mappings.
432
433       semanage permissive can also be used to manipulate  whether  or  not  a
434       process type is permissive.
435
436       semanage  module can also be used to enable/disable/install/remove pol‐
437       icy modules.
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439       semanage boolean can also be used to manipulate the booleans
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441
442       system-config-selinux is a GUI tool available to customize SELinux pol‐
443       icy settings.
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AUTHOR

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