sshd_selinux(8)

1sshd_selinux(8)               SELinux Policy sshd              sshd_selinux(8)
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NAME

6       sshd_selinux - Security Enhanced Linux Policy for the sshd processes
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DESCRIPTION

9       Security-Enhanced  Linux secures the sshd processes via flexible manda‐
10       tory access control.
11
12       The sshd processes execute with the sshd_t SELinux type. You can  check
13       if  you  have  these processes running by executing the ps command with
14       the -Z qualifier.
15
16       For example:
17
18       ps -eZ | grep sshd_t
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20
21

ENTRYPOINTS

23       The sshd_t SELinux type can be entered via the sshd_exec_t file type.
24
25       The default entrypoint paths for the sshd_t domain are the following:
26
27       /usr/sbin/sshd
28

PROCESS TYPES

30       SELinux defines process types (domains) for each process running on the
31       system
32
33       You can see the context of a process using the -Z option to ps
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35       Policy  governs  the  access confined processes have to files.  SELinux
36       sshd policy is very flexible allowing users to setup  their  sshd  pro‐
37       cesses in as secure a method as possible.
38
39       The following process types are defined for sshd:
40
41       ssh_keysign_t, ssh_keygen_t, ssh_t, sshd_t
42
43       Note:  semanage  permissive  -a  sshd_t can be used to make the process
44       type sshd_t permissive. SELinux does  not  deny  access  to  permissive
45       process  types, but the AVC (SELinux denials) messages are still gener‐
46       ated.
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48

BOOLEANS

50       SELinux policy is customizable based on least  access  required.   sshd
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run sshd with the tightest access possible.
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54
55
56       If you want to allow ssh logins as sysadm_r:sysadm_t, you must turn  on
57       the ssh_sysadm_login boolean. Disabled by default.
58
59       setsebool -P ssh_sysadm_login 1
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61
62
63       If you want to allow all daemons to write corefiles to /, you must turn
64       on the allow_daemons_dump_core boolean. Disabled by default.
65
66       setsebool -P allow_daemons_dump_core 1
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68
69
70       If you want to allow all daemons to use tcp wrappers, you must turn  on
71       the allow_daemons_use_tcp_wrapper boolean. Disabled by default.
72
73       setsebool -P allow_daemons_use_tcp_wrapper 1
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75
76
77       If  you  want to allow all daemons the ability to read/write terminals,
78       you  must  turn  on  the  allow_daemons_use_tty  boolean.  Disabled  by
79       default.
80
81       setsebool -P allow_daemons_use_tty 1
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83
84
85       If you want to allow all domains to use other domains file descriptors,
86       you must turn on the allow_domain_fd_use boolean. Enabled by default.
87
88       setsebool -P allow_domain_fd_use 1
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90
91
92       If you want to allow confined applications to run  with  kerberos,  you
93       must turn on the allow_kerberos boolean. Enabled by default.
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95       setsebool -P allow_kerberos 1
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98
99       If you want to enable polyinstantiated directory support, you must turn
100       on the allow_polyinstantiation boolean. Enabled by default.
101
102       setsebool -P allow_polyinstantiation 1
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104
105
106       If you want to allow sysadm to debug or ptrace all processes, you  must
107       turn on the allow_ptrace boolean. Disabled by default.
108
109       setsebool -P allow_ptrace 1
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111
112
113       If  you  want  to  allow  system  to run with NIS, you must turn on the
114       allow_ypbind boolean. Disabled by default.
115
116       setsebool -P allow_ypbind 1
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118
119
120       If you want to allow users to login using a  radius  server,  you  must
121       turn on the authlogin_radius boolean. Disabled by default.
122
123       setsebool -P authlogin_radius 1
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125
126
127       If  you  want  to allow users login programs to access /etc/shadow, you
128       must turn on the authlogin_shadow boolean. Disabled by default.
129
130       setsebool -P authlogin_shadow 1
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133
134       If you want to enable cluster mode for daemons, you must  turn  on  the
135       daemons_enable_cluster_mode boolean. Disabled by default.
136
137       setsebool -P daemons_enable_cluster_mode 1
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139
140
141       If  you  want to allow all domains to have the kernel load modules, you
142       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
143       default.
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145       setsebool -P domain_kernel_load_modules 1
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148
149       If you want to allow all domains to execute in fips_mode, you must turn
150       on the fips_mode boolean. Enabled by default.
151
152       setsebool -P fips_mode 1
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154
155
156       If you want to enable reading of urandom for all domains, you must turn
157       on the global_ssp boolean. Disabled by default.
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159       setsebool -P global_ssp 1
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162
163       If you want to enable support for upstart as the init program, you must
164       turn on the init_upstart boolean. Enabled by default.
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166       setsebool -P init_upstart 1
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168
169
170       If you want to allow confined applications to use nscd  shared  memory,
171       you must turn on the nscd_use_shm boolean. Enabled by default.
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173       setsebool -P nscd_use_shm 1
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176
177       If  you want to allow a user to login as an unconfined domain, you must
178       turn on the unconfined_login boolean. Enabled by default.
179
180       setsebool -P unconfined_login 1
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182
183
184       If you want to support fusefs home directories, you must  turn  on  the
185       use_fusefs_home_dirs boolean. Disabled by default.
186
187       setsebool -P use_fusefs_home_dirs 1
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189
190
191       If  you  want  to  support  NFS  home directories, you must turn on the
192       use_nfs_home_dirs boolean. Disabled by default.
193
194       setsebool -P use_nfs_home_dirs 1
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196
197
198       If you want to support SAMBA home directories, you  must  turn  on  the
199       use_samba_home_dirs boolean. Disabled by default.
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201       setsebool -P use_samba_home_dirs 1
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PORT TYPES

206       SELinux defines port types to represent TCP and UDP ports.
207
208       You  can  see  the  types associated with a port by using the following
209       command:
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211       semanage port -l
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213
214       Policy governs the access  confined  processes  have  to  these  ports.
215       SELinux sshd policy is very flexible allowing users to setup their sshd
216       processes in as secure a method as possible.
217
218       The following port types are defined for sshd:
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220
221       ssh_port_t
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224
225       Default Defined Ports:
226                 tcp 22
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MANAGED FILES

229       The SELinux process type sshd_t can manage files labeled with the  fol‐
230       lowing  file  types.   The paths listed are the default paths for these
231       file types.  Note the processes UID still need to have DAC permissions.
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233       auth_cache_t
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235            /var/cache/coolkey(/.*)?
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237       cgroup_t
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239            /cgroup(/.*)?
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241       cluster_conf_t
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243            /etc/cluster(/.*)?
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245       cluster_var_lib_t
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247            /var/lib(64)?/openais(/.*)?
248            /var/lib(64)?/pengine(/.*)?
249            /var/lib(64)?/corosync(/.*)?
250            /usr/lib(64)?/heartbeat(/.*)?
251            /var/lib(64)?/heartbeat(/.*)?
252            /var/lib(64)?/pacemaker(/.*)?
253            /var/lib/cluster(/.*)?
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255       cluster_var_run_t
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257            /var/run/crm(/.*)?
258            /var/run/cman_.*
259            /var/run/rsctmp(/.*)?
260            /var/run/aisexec.*
261            /var/run/heartbeat(/.*)?
262            /var/run/cpglockd.pid
263            /var/run/corosync.pid
264            /var/run/rgmanager.pid
265            /var/run/cluster/rgmanager.sk
266
267       condor_var_lib_t
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269            /var/lib/condor(/.*)?
270            /var/lib/condor/spool(/.*)?
271            /var/lib/condor/execute(/.*)?
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273       faillog_t
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275            /var/log/btmp.*
276            /var/log/faillog.*
277            /var/log/tallylog.*
278            /var/run/faillock(/.*)?
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280       fusefs_t
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282
283       gitosis_var_lib_t
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285            /var/lib/gitosis(/.*)?
286            /var/lib/gitolite(3)?(/.*)?
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288       initrc_tmp_t
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291       initrc_var_run_t
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293            /var/run/utmp
294            /var/run/random-seed
295            /var/run/runlevel.dir
296            /var/run/setmixer_flag
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298       krb5_host_rcache_t
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300            /var/cache/krb5rcache(/.*)?
301            /var/tmp/host_0
302            /var/tmp/HTTP_23
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304       lastlog_t
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306            /var/log/lastlog.*
307
308       mnt_t
309
310            /mnt(/[^/]*)
311            /mnt(/[^/]*)?
312            /rhev(/[^/]*)?
313            /media(/[^/]*)
314            /media(/[^/]*)?
315            /etc/rhgb(/.*)?
316            /media/.hal-.*
317            /net
318            /afs
319            /rhev
320            /misc
321
322       openshift_tmp_t
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324            /var/lib/openshift/.*/.tmp(/.*)?
325            /var/lib/openshift/.*/.sandbox(/.*)?
326            /var/lib/stickshift/.*/.tmp(/.*)?
327            /var/lib/stickshift/.*/.sandbox(/.*)?
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329       pam_var_run_t
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331            /var/(db|adm)/sudo(/.*)?
332            /var/run/sudo(/.*)?
333            /var/lib/sudo(/.*)?
334            /var/run/sepermit(/.*)?
335            /var/run/pam_mount(/.*)?
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337       pcscd_var_run_t
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339            /var/run/pcscd.events(/.*)?
340            /var/run/pcscd.pid
341            /var/run/pcscd.pub
342            /var/run/pcscd.comm
343
344       root_t
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346            /
347            /initrd
348
349       security_t
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351
352       ssh_home_t
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354            /root/.ssh(/.*)?
355            /var/lib/gitolite(3)?/.ssh(/.*)?
356            /var/lib/pgsql/.ssh(/.*)?
357            /var/lib/openshift/[^/]+/.ssh(/.*)?
358            /var/lib/amanda/.ssh(/.*)?
359            /var/lib/stickshift/[^/]+/.ssh(/.*)?
360            /root/.shosts
361            /home/[^/]*/.ssh(/.*)?
362            /home/[^/]*/.shosts
363            /home/staff/.ssh(/.*)?
364            /home/staff/.shosts
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366       sshd_tmpfs_t
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369       sshd_var_run_t
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371            /var/run/sshd.init.pid
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373       tmp_t
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375            /tmp
376            /usr/tmp
377            /var/tmp
378            /tmp-inst
379            /var/tmp-inst
380            /var/tmp/vi.recover
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382       user_home_t
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384            /home/[^/]*/.+
385            /home/staff/.+
386
387       user_tmp_t
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389            /tmp/gconfd-.*
390            /tmp/gconfd-staff
391
392       var_auth_t
393
394            /var/ace(/.*)?
395            /var/rsa(/.*)?
396            /var/lib/rsa(/.*)?
397            /var/lib/abl(/.*)?
398            /var/run/pam_ssh(/.*)?
399            /var/lib/pam_ssh(/.*)?
400            /var/lib/pam_shield(/.*)?
401            /var/opt/quest/vas/vasd(/.*)?
402            /var/lib/google-authenticator(/.*)?
403
404       wtmp_t
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406            /var/log/wtmp.*
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FILE CONTEXTS

410       SELinux requires files to have an extended attribute to define the file
411       type.
412
413       You can see the context of a file using the -Z option to ls
414
415       Policy  governs  the  access  confined  processes  have to these files.
416       SELinux sshd policy is very flexible allowing users to setup their sshd
417       processes in as secure a method as possible.
418
419       STANDARD FILE CONTEXT
420
421       SELinux  defines  the file context types for the sshd, if you wanted to
422       store files with these types in a diffent paths, you  need  to  execute
423       the  semanage  command  to  sepecify  alternate  labeling  and then use
424       restorecon to put the labels on disk.
425
426       semanage fcontext -a -t sshd_var_run_t '/srv/mysshd_content(/.*)?'
427       restorecon -R -v /srv/mysshd_content
428
429       Note: SELinux often uses regular expressions  to  specify  labels  that
430       match multiple files.
431
432       The following file types are defined for sshd:
433
434
435
436       sshd_exec_t
437
438       -  Set  files  with  the sshd_exec_t type, if you want to transition an
439       executable to the sshd_t domain.
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441
442
443       sshd_initrc_exec_t
444
445       - Set files with the sshd_initrc_exec_t type, if you want to transition
446       an executable to the sshd_initrc_t domain.
447
448
449
450       sshd_key_t
451
452       - Set files with the sshd_key_t type, if you want to treat the files as
453       sshd key data.
454
455
456       Paths:
457            /etc/ssh/ssh_host_key.pub,          /etc/ssh/ssh_host_dsa_key.pub,
458            /etc/ssh/ssh_host_rsa_key.pub,                    /etc/ssh/primes,
459            /etc/ssh/ssh_host_key,                  /etc/ssh/ssh_host_dsa_key,
460            /etc/ssh/ssh_host_rsa_key
461
462
463       sshd_keytab_t
464
465       - Set files with the sshd_keytab_t type, if you want to treat the files
466       as kerberos keytab files.
467
468
469
470       sshd_tmpfs_t
471
472       - Set files with the sshd_tmpfs_t type, if you want to store sshd files
473       on a tmpfs file system.
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475
476
477       sshd_var_run_t
478
479       - Set files with the sshd_var_run_t type, if you want to store the sshd
480       files under the /run or /var/run directory.
481
482
483
484       Note: File context can be temporarily modified with the chcon  command.
485       If  you want to permanently change the file context you need to use the
486       semanage fcontext command.  This will modify the SELinux labeling data‐
487       base.  You will need to use restorecon to apply the labels.
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489

COMMANDS

491       semanage  fcontext  can also be used to manipulate default file context
492       mappings.
493
494       semanage permissive can also be used to manipulate  whether  or  not  a
495       process type is permissive.
496
497       semanage  module can also be used to enable/disable/install/remove pol‐
498       icy modules.
499
500       semanage port can also be used to manipulate the port definitions
501
502       semanage boolean can also be used to manipulate the booleans
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504
505       system-config-selinux is a GUI tool available to customize SELinux pol‐
506       icy settings.
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508

AUTHOR

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