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.
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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:
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27       /usr/sbin/sshd, /usr/sbin/gsisshd
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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       sshd_t, sshd_sandbox_t, sshd_net_t, ssh_keygen_t, sshd_keygen_t, ssh_t, ssh_keysign_t
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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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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 all domains to execute in fips_mode, you must turn
71       on the fips_mode boolean. Enabled by default.
72
73       setsebool -P fips_mode 1
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76
77       If  you  want  to allow confined applications to run with kerberos, you
78       must turn on the kerberos_enabled boolean. Enabled by default.
79
80       setsebool -P kerberos_enabled 1
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82
83
84       If you want to allow system to run with  NIS,  you  must  turn  on  the
85       nis_enabled boolean. Disabled by default.
86
87       setsebool -P nis_enabled 1
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89
90
91       If you want to enable polyinstantiated directory support, you must turn
92       on the polyinstantiation_enabled boolean. Disabled by default.
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94       setsebool -P polyinstantiation_enabled 1
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PORT TYPES

99       SELinux defines port types to represent TCP and UDP ports.
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101       You can see the types associated with a port  by  using  the  following
102       command:
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104       semanage port -l
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106
107       Policy  governs  the  access  confined  processes  have to these ports.
108       SELinux sshd policy is very flexible allowing users to setup their sshd
109       processes in as secure a method as possible.
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111       The following port types are defined for sshd:
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113
114       ssh_port_t
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118       Default Defined Ports:
119                 tcp 22
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MANAGED FILES

122       The  SELinux process type sshd_t can manage files labeled with the fol‐
123       lowing file types.  The paths listed are the default  paths  for  these
124       file types.  Note the processes UID still need to have DAC permissions.
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126       auth_cache_t
127
128            /var/cache/coolkey(/.*)?
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130       auth_home_t
131
132            /root/.yubico(/.*)?
133            /root/.config/Yubico(/.*)?
134            /root/.google_authenticator
135            /root/.google_authenticator~
136            /home/[^/]+/.yubico(/.*)?
137            /home/[^/]+/.config/Yubico(/.*)?
138            /home/[^/]+/.google_authenticator
139            /home/[^/]+/.google_authenticator~
140
141       cifs_t
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143
144       cluster_conf_t
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146            /etc/cluster(/.*)?
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148       cluster_var_lib_t
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150            /var/lib/pcsd(/.*)?
151            /var/lib/cluster(/.*)?
152            /var/lib/openais(/.*)?
153            /var/lib/pengine(/.*)?
154            /var/lib/corosync(/.*)?
155            /usr/lib/heartbeat(/.*)?
156            /var/lib/heartbeat(/.*)?
157            /var/lib/pacemaker(/.*)?
158
159       cluster_var_run_t
160
161            /var/run/crm(/.*)?
162            /var/run/cman_.*
163            /var/run/rsctmp(/.*)?
164            /var/run/aisexec.*
165            /var/run/heartbeat(/.*)?
166            /var/run/pcsd-ruby.socket
167            /var/run/corosync-qnetd(/.*)?
168            /var/run/corosync-qdevice(/.*)?
169            /var/run/corosync.pid
170            /var/run/cpglockd.pid
171            /var/run/rgmanager.pid
172            /var/run/cluster/rgmanager.sk
173
174       condor_var_lib_t
175
176            /var/lib/condor(/.*)?
177            /var/lib/condor/spool(/.*)?
178            /var/lib/condor/execute(/.*)?
179
180       ecryptfs_t
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182            /home/[^/]+/.Private(/.*)?
183            /home/[^/]+/.ecryptfs(/.*)?
184
185       faillog_t
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187            /var/log/btmp.*
188            /var/log/faillog.*
189            /var/log/tallylog.*
190            /var/run/faillock(/.*)?
191
192       fusefs_t
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194            /var/run/user/[0-9]+/gvfs
195
196       gitosis_var_lib_t
197
198            /srv/lib/gitosis(/.*)?
199            /var/lib/gitosis(/.*)?
200            /var/lib/gitolite(3)?(/.*)?
201
202       initrc_var_run_t
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204            /var/run/utmp
205            /var/run/random-seed
206            /var/run/runlevel.dir
207            /var/run/setmixer_flag
208
209       kadmind_tmp_t
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211            /var/tmp/kadmin_0
212            /var/tmp/kiprop_0
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214       krb5_host_rcache_t
215
216            /var/tmp/krb5_0.rcache2
217            /var/cache/krb5rcache(/.*)?
218            /var/tmp/nfs_0
219            /var/tmp/DNS_25
220            /var/tmp/host_0
221            /var/tmp/imap_0
222            /var/tmp/HTTP_23
223            /var/tmp/HTTP_48
224            /var/tmp/ldap_55
225            /var/tmp/ldap_487
226            /var/tmp/ldapmap1_0
227
228       lastlog_t
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230            /var/log/lastlog.*
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232       nfs_t
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234
235       openshift_tmp_t
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237            /var/lib/openshift/.*/.tmp(/.*)?
238            /var/lib/openshift/.*/.sandbox(/.*)?
239            /var/lib/stickshift/.*/.tmp(/.*)?
240            /var/lib/stickshift/.*/.sandbox(/.*)?
241
242       pam_var_run_t
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244            /var/(db|adm)/sudo(/.*)?
245            /var/lib/sudo(/.*)?
246            /var/run/sudo(/.*)?
247            /var/run/pam_ssh(/.*)?
248            /var/run/sepermit(/.*)?
249            /var/run/pam_mount(/.*)?
250            /var/run/pam_timestamp(/.*)?
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252       root_t
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254            /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
255            /
256            /initrd
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258       security_t
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260            /selinux
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262       sshd_var_run_t
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264            /var/run/sshd.pid
265            /var/run/sshd.init.pid
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267       systemd_passwd_var_run_t
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269            /var/run/systemd/ask-password(/.*)?
270            /var/run/systemd/ask-password-block(/.*)?
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272       user_tmp_t
273
274            /dev/shm/mono.*
275            /var/run/user/[^/]+
276            /tmp/.ICE-unix(/.*)?
277            /tmp/.X11-unix(/.*)?
278            /dev/shm/pulse-shm.*
279            /tmp/.X0-lock
280            /var/run/user
281            /tmp/hsperfdata_root
282            /var/tmp/hsperfdata_root
283            /home/[^/]+/tmp
284            /home/[^/]+/.tmp
285            /var/run/user/[0-9]+
286            /tmp/gconfd-[^/]+
287
288       user_tmp_type
289
290            all user tmp files
291
292       var_auth_t
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294            /var/ace(/.*)?
295            /var/rsa(/.*)?
296            /var/lib/abl(/.*)?
297            /var/lib/rsa(/.*)?
298            /var/lib/pam_ssh(/.*)?
299            /var/lib/pam_shield(/.*)?
300            /var/opt/quest/vas/vasd(/.*)?
301            /var/lib/google-authenticator(/.*)?
302
303       wtmp_t
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305            /var/log/wtmp.*
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307

FILE CONTEXTS

309       SELinux requires files to have an extended attribute to define the file
310       type.
311
312       You can see the context of a file using the -Z option to ls
313
314       Policy governs the access  confined  processes  have  to  these  files.
315       SELinux sshd policy is very flexible allowing users to setup their sshd
316       processes in as secure a method as possible.
317
318       STANDARD FILE CONTEXT
319
320       SELinux defines the file context types for the sshd, if you  wanted  to
321       store  files  with  these types in a diffent paths, you need to execute
322       the semanage command to specify alternate labeling  and  then  use  re‐
323       storecon to put the labels on disk.
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325       semanage fcontext -a -t sshd_keytab_t '/srv/mysshd_content(/.*)?'
326       restorecon -R -v /srv/mysshd_content
327
328       Note:  SELinux  often  uses  regular expressions to specify labels that
329       match multiple files.
330
331       The following file types are defined for sshd:
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334
335       sshd_exec_t
336
337       - Set files with the sshd_exec_t type, if you want to transition an ex‐
338       ecutable to the sshd_t domain.
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340
341       Paths:
342            /usr/sbin/sshd, /usr/sbin/gsisshd
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344
345       sshd_initrc_exec_t
346
347       - Set files with the sshd_initrc_exec_t type, if you want to transition
348       an executable to the sshd_initrc_t domain.
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351
352       sshd_key_t
353
354       - Set files with the sshd_key_t type, if you want to treat the files as
355       sshd key data.
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357
358       Paths:
359            /etc/ssh/ssh_host.*_key,              /etc/ssh/ssh_host.*_key.pub,
360            /etc/ssh/primes
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362
363       sshd_keygen_exec_t
364
365       - Set files with the sshd_keygen_exec_t type, if you want to transition
366       an executable to the sshd_keygen_t domain.
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368
369       Paths:
370            /usr/sbin/sshd-keygen, /usr/libexec/openssh/sshd-keygen
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372
373       sshd_keygen_unit_file_t
374
375       - Set files with the sshd_keygen_unit_file_t type, if you want to treat
376       the files as sshd keygen unit content.
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378
379
380       sshd_keytab_t
381
382       - Set files with the sshd_keytab_t type, if you want to treat the files
383       as kerberos keytab files.
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385
386
387       sshd_tmpfs_t
388
389       - Set files with the sshd_tmpfs_t type, if you want to store sshd files
390       on a tmpfs file system.
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393
394       sshd_unit_file_t
395
396       - Set files with the sshd_unit_file_t type, if you want  to  treat  the
397       files as sshd unit content.
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400
401       sshd_var_run_t
402
403       - Set files with the sshd_var_run_t type, if you want to store the sshd
404       files under the /run or /var/run directory.
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406
407       Paths:
408            /var/run/sshd.pid, /var/run/sshd.init.pid
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410
411       Note: File context can be temporarily modified with the chcon  command.
412       If  you want to permanently change the file context you need to use the
413       semanage fcontext command.  This will modify the SELinux labeling data‐
414       base.  You will need to use restorecon to apply the labels.
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416

COMMANDS

418       semanage  fcontext  can also be used to manipulate default file context
419       mappings.
420
421       semanage permissive can also be used to manipulate  whether  or  not  a
422       process type is permissive.
423
424       semanage  module can also be used to enable/disable/install/remove pol‐
425       icy modules.
426
427       semanage port can also be used to manipulate the port definitions
428
429       semanage boolean can also be used to manipulate the booleans
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431
432       system-config-selinux is a GUI tool available to customize SELinux pol‐
433       icy settings.
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435

AUTHOR

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