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
7

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, /usr/sbin/gsisshd
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
34
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       sshd_t, sshd_sandbox_t, sshd_net_t, ssh_keygen_t, sshd_keygen_t, ssh_t, ssh_keysign_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 sshd to use tcp wrappers, you must turn on the
64       ssh_use_tcpd boolean. Disabled by default.
65
66       setsebool -P ssh_use_tcpd 1
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68
69
70       If you want to allow users to resolve user passwd entries directly from
71       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
72       gin_nsswitch_use_ldap boolean. Disabled by default.
73
74       setsebool -P authlogin_nsswitch_use_ldap 1
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76
77
78       If you want to allow all domains to execute in fips_mode, you must turn
79       on the fips_mode boolean. Enabled by default.
80
81       setsebool -P fips_mode 1
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83
84
85       If  you  want  to allow confined applications to run with kerberos, you
86       must turn on the kerberos_enabled boolean. Enabled by default.
87
88       setsebool -P kerberos_enabled 1
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90
91
92       If you want to allow system to run with  NIS,  you  must  turn  on  the
93       nis_enabled boolean. Disabled by default.
94
95       setsebool -P nis_enabled 1
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97
98
99       If  you  want to allow confined applications to use nscd shared memory,
100       you must turn on the nscd_use_shm boolean. Enabled by default.
101
102       setsebool -P nscd_use_shm 1
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104
105
106       If you want to enable polyinstantiated directory support, you must turn
107       on the polyinstantiation_enabled boolean. Disabled by default.
108
109       setsebool -P polyinstantiation_enabled 1
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111
112

PORT TYPES

114       SELinux defines port types to represent TCP and UDP ports.
115
116       You  can  see  the  types associated with a port by using the following
117       command:
118
119       semanage port -l
120
121
122       Policy governs the access  confined  processes  have  to  these  ports.
123       SELinux sshd policy is very flexible allowing users to setup their sshd
124       processes in as secure a method as possible.
125
126       The following port types are defined for sshd:
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128
129       ssh_port_t
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131
132
133       Default Defined Ports:
134                 tcp 22
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MANAGED FILES

137       The SELinux process type sshd_t can manage files labeled with the  fol‐
138       lowing  file  types.   The paths listed are the default paths for these
139       file types.  Note the processes UID still need to have DAC permissions.
140
141       auth_cache_t
142
143            /var/cache/coolkey(/.*)?
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145       auth_home_t
146
147            /root/.yubico(/.*)?
148            /root/.google_authenticator
149            /root/.google_authenticator~
150            /home/[^/]+/.yubico(/.*)?
151            /home/[^/]+/.google_authenticator
152            /home/[^/]+/.google_authenticator~
153
154       cgroup_t
155
156            /sys/fs/cgroup
157
158       cifs_t
159
160
161       cluster_conf_t
162
163            /etc/cluster(/.*)?
164
165       cluster_var_lib_t
166
167            /var/lib/pcsd(/.*)?
168            /var/lib/cluster(/.*)?
169            /var/lib/openais(/.*)?
170            /var/lib/pengine(/.*)?
171            /var/lib/corosync(/.*)?
172            /usr/lib/heartbeat(/.*)?
173            /var/lib/heartbeat(/.*)?
174            /var/lib/pacemaker(/.*)?
175
176       cluster_var_run_t
177
178            /var/run/crm(/.*)?
179            /var/run/cman_.*
180            /var/run/rsctmp(/.*)?
181            /var/run/aisexec.*
182            /var/run/heartbeat(/.*)?
183            /var/run/corosync-qnetd(/.*)?
184            /var/run/corosync-qdevice(/.*)?
185            /var/run/corosync.pid
186            /var/run/cpglockd.pid
187            /var/run/rgmanager.pid
188            /var/run/cluster/rgmanager.sk
189
190       condor_var_lib_t
191
192            /var/lib/condor(/.*)?
193            /var/lib/condor/spool(/.*)?
194            /var/lib/condor/execute(/.*)?
195
196       ecryptfs_t
197
198            /home/[^/]+/.Private(/.*)?
199            /home/[^/]+/.ecryptfs(/.*)?
200
201       faillog_t
202
203            /var/log/btmp.*
204            /var/log/faillog.*
205            /var/log/tallylog.*
206            /var/run/faillock(/.*)?
207
208       fusefs_t
209
210            /var/run/user/[^/]*/gvfs
211
212       gitosis_var_lib_t
213
214            /srv/lib/gitosis(/.*)?
215            /var/lib/gitosis(/.*)?
216            /var/lib/gitolite(3)?(/.*)?
217
218       initrc_var_run_t
219
220            /var/run/utmp
221            /var/run/random-seed
222            /var/run/runlevel.dir
223            /var/run/setmixer_flag
224
225       kdbusfs_t
226
227
228       krb5_host_rcache_t
229
230            /var/cache/krb5rcache(/.*)?
231            /var/tmp/nfs_0
232            /var/tmp/DNS_25
233            /var/tmp/host_0
234            /var/tmp/imap_0
235            /var/tmp/HTTP_23
236            /var/tmp/HTTP_48
237            /var/tmp/ldap_55
238            /var/tmp/ldap_487
239            /var/tmp/ldapmap1_0
240
241       lastlog_t
242
243            /var/log/lastlog.*
244
245       nfs_t
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247
248       openshift_tmp_t
249
250            /var/lib/openshift/.*/.tmp(/.*)?
251            /var/lib/openshift/.*/.sandbox(/.*)?
252            /var/lib/stickshift/.*/.tmp(/.*)?
253            /var/lib/stickshift/.*/.sandbox(/.*)?
254
255       pam_var_run_t
256
257            /var/(db|adm)/sudo(/.*)?
258            /var/lib/sudo(/.*)?
259            /var/run/sudo(/.*)?
260            /var/run/sepermit(/.*)?
261            /var/run/pam_mount(/.*)?
262
263       root_t
264
265            /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
266            /
267            /initrd
268
269       security_t
270
271            /selinux
272
273       ssh_home_t
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275            /var/lib/[^/]+/.ssh(/.*)?
276            /root/.ssh(/.*)?
277            /var/lib/one/.ssh(/.*)?
278            /var/lib/pgsql/.ssh(/.*)?
279            /var/lib/openshift/[^/]+/.ssh(/.*)?
280            /var/lib/amanda/.ssh(/.*)?
281            /var/lib/stickshift/[^/]+/.ssh(/.*)?
282            /var/lib/gitolite/.ssh(/.*)?
283            /var/lib/nocpulse/.ssh(/.*)?
284            /var/lib/gitolite3/.ssh(/.*)?
285            /var/lib/openshift/gear/[^/]+/.ssh(/.*)?
286            /root/.shosts
287            /home/[^/]+/.ssh(/.*)?
288            /home/[^/]+/.ansible/cp/.*
289            /home/[^/]+/.shosts
290
291       sshd_var_run_t
292
293            /var/run/sshd.pid
294            /var/run/sshd.init.pid
295
296       systemd_passwd_var_run_t
297
298            /var/run/systemd/ask-password(/.*)?
299            /var/run/systemd/ask-password-block(/.*)?
300
301       user_tmp_t
302
303            /dev/shm/mono.*
304            /var/run/user(/.*)?
305            /tmp/.ICE-unix(/.*)?
306            /tmp/.X11-unix(/.*)?
307            /dev/shm/pulse-shm.*
308            /tmp/.X0-lock
309            /tmp/hsperfdata_root
310            /var/tmp/hsperfdata_root
311            /home/[^/]+/tmp
312            /home/[^/]+/.tmp
313            /tmp/gconfd-[^/]+
314
315       user_tmp_type
316
317            all user tmp files
318
319       var_auth_t
320
321            /var/ace(/.*)?
322            /var/rsa(/.*)?
323            /var/lib/abl(/.*)?
324            /var/lib/rsa(/.*)?
325            /var/lib/pam_ssh(/.*)?
326            /var/run/pam_ssh(/.*)?
327            /var/lib/pam_shield(/.*)?
328            /var/opt/quest/vas/vasd(/.*)?
329            /var/lib/google-authenticator(/.*)?
330
331       wtmp_t
332
333            /var/log/wtmp.*
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335

FILE CONTEXTS

337       SELinux requires files to have an extended attribute to define the file
338       type.
339
340       You can see the context of a file using the -Z option to ls
341
342       Policy  governs  the  access  confined  processes  have to these files.
343       SELinux sshd policy is very flexible allowing users to setup their sshd
344       processes in as secure a method as possible.
345
346       STANDARD FILE CONTEXT
347
348       SELinux  defines  the file context types for the sshd, if you wanted to
349       store files with these types in a diffent paths, you  need  to  execute
350       the  semanage  command  to  sepecify  alternate  labeling  and then use
351       restorecon to put the labels on disk.
352
353       semanage fcontext -a -t sshd_keytab_t '/srv/mysshd_content(/.*)?'
354       restorecon -R -v /srv/mysshd_content
355
356       Note: SELinux often uses regular expressions  to  specify  labels  that
357       match multiple files.
358
359       The following file types are defined for sshd:
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361
362
363       sshd_exec_t
364
365       -  Set  files  with  the sshd_exec_t type, if you want to transition an
366       executable to the sshd_t domain.
367
368
369       Paths:
370            /usr/sbin/sshd, /usr/sbin/gsisshd
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372
373       sshd_initrc_exec_t
374
375       - Set files with the sshd_initrc_exec_t type, if you want to transition
376       an executable to the sshd_initrc_t domain.
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378
379
380       sshd_key_t
381
382       - Set files with the sshd_key_t type, if you want to treat the files as
383       sshd key data.
384
385
386       Paths:
387            /etc/ssh/ssh_host.*_key,              /etc/ssh/ssh_host.*_key.pub,
388            /etc/ssh/primes
389
390
391       sshd_keygen_exec_t
392
393       - Set files with the sshd_keygen_exec_t type, if you want to transition
394       an executable to the sshd_keygen_t domain.
395
396
397       Paths:
398            /usr/sbin/sshd-keygen, /usr/libexec/openssh/sshd-keygen
399
400
401       sshd_keygen_unit_file_t
402
403       - Set files with the sshd_keygen_unit_file_t type, if you want to treat
404       the files as sshd keygen unit content.
405
406
407
408       sshd_keytab_t
409
410       - Set files with the sshd_keytab_t type, if you want to treat the files
411       as kerberos keytab files.
412
413
414
415       sshd_tmpfs_t
416
417       - Set files with the sshd_tmpfs_t type, if you want to store sshd files
418       on a tmpfs file system.
419
420
421
422       sshd_unit_file_t
423
424       -  Set  files  with the sshd_unit_file_t type, if you want to treat the
425       files as sshd unit content.
426
427
428
429       sshd_var_run_t
430
431       - Set files with the sshd_var_run_t type, if you want to store the sshd
432       files under the /run or /var/run directory.
433
434
435       Paths:
436            /var/run/sshd.pid, /var/run/sshd.init.pid
437
438
439       Note:  File context can be temporarily modified with the chcon command.
440       If you want to permanently change the file context you need to use  the
441       semanage fcontext command.  This will modify the SELinux labeling data‐
442       base.  You will need to use restorecon to apply the labels.
443
444

COMMANDS

446       semanage fcontext can also be used to manipulate default  file  context
447       mappings.
448
449       semanage  permissive  can  also  be used to manipulate whether or not a
450       process type is permissive.
451
452       semanage module can also be used to enable/disable/install/remove  pol‐
453       icy modules.
454
455       semanage port can also be used to manipulate the port definitions
456
457       semanage boolean can also be used to manipulate the booleans
458
459
460       system-config-selinux is a GUI tool available to customize SELinux pol‐
461       icy settings.
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463

AUTHOR

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