named_selinux(8)

1named_selinux(8)             SELinux Policy named             named_selinux(8)
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NAME

6       named_selinux - Security Enhanced Linux Policy for the named processes
7

DESCRIPTION

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

ENTRYPOINTS

23       The named_t SELinux type can be entered via the named_checkconf_exec_t,
24       named_exec_t file types.
25
26       The default entrypoint paths for the named_t domain are the following:
27
28       /usr/sbin/named-checkconf,      /usr/sbin/named,      /usr/sbin/lwresd,
29       /usr/sbin/unbound,     /usr/sbin/named-sdb,     /usr/sbin/named-pkcs11,
30       /usr/sbin/unbound-anchor, /usr/sbin/unbound-control, /usr/sbin/unbound-
31       checkconf
32

PROCESS TYPES

34       SELinux defines process types (domains) for each process running on the
35       system
36
37       You can see the context of a process using the -Z option to ps
38
39       Policy  governs  the  access confined processes have to files.  SELinux
40       named policy is very flexible allowing users to setup their named  pro‐
41       cesses in as secure a method as possible.
42
43       The following process types are defined for named:
44
45       named_t
46
47       Note:  semanage  permissive  -a named_t can be used to make the process
48       type named_t permissive. SELinux does not  deny  access  to  permissive
49       process  types, but the AVC (SELinux denials) messages are still gener‐
50       ated.
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52

BOOLEANS

54       SELinux policy is customizable based on least access  required.   named
55       policy is extremely flexible and has several booleans that allow you to
56       manipulate the policy and run named with the tightest access possible.
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58
59
60       If you want to determine whether Bind  can  bind  tcp  socket  to  http
61       ports,  you must turn on the named_tcp_bind_http_port boolean. Disabled
62       by default.
63
64       setsebool -P named_tcp_bind_http_port 1
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66
67
68       If you want to determine whether Bind can write to master  zone  files.
69       Generally this is used for dynamic DNS or zone transfers, you must turn
70       on the named_write_master_zones boolean. Disabled by default.
71
72       setsebool -P named_write_master_zones 1
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74
75
76       If you want to allow users to resolve user passwd entries directly from
77       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
78       gin_nsswitch_use_ldap boolean. Disabled by default.
79
80       setsebool -P authlogin_nsswitch_use_ldap 1
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82
83
84       If you want to allow all daemons to write corefiles to /, you must turn
85       on the daemons_dump_core boolean. Disabled by default.
86
87       setsebool -P daemons_dump_core 1
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89
90
91       If  you  want  to enable cluster mode for daemons, you must turn on the
92       daemons_enable_cluster_mode boolean. Enabled by default.
93
94       setsebool -P daemons_enable_cluster_mode 1
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96
97
98       If you want to allow all daemons to use tcp wrappers, you must turn  on
99       the daemons_use_tcp_wrapper boolean. Disabled by default.
100
101       setsebool -P daemons_use_tcp_wrapper 1
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103
104
105       If  you  want to allow all daemons the ability to read/write terminals,
106       you must turn on the daemons_use_tty boolean. Disabled by default.
107
108       setsebool -P daemons_use_tty 1
109
110
111
112       If you want to deny any process from ptracing or  debugging  any  other
113       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
114       default.
115
116       setsebool -P deny_ptrace 1
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118
119
120       If you want to allow any process  to  mmap  any  file  on  system  with
121       attribute  file_type,  you must turn on the domain_can_mmap_files bool‐
122       ean. Enabled by default.
123
124       setsebool -P domain_can_mmap_files 1
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126
127
128       If you want to allow all domains write to kmsg_device, while kernel  is
129       executed  with  systemd.log_target=kmsg parameter, you must turn on the
130       domain_can_write_kmsg boolean. Disabled by default.
131
132       setsebool -P domain_can_write_kmsg 1
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134
135
136       If you want to allow all domains to use other domains file descriptors,
137       you must turn on the domain_fd_use boolean. Enabled by default.
138
139       setsebool -P domain_fd_use 1
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141
142
143       If  you  want to allow all domains to have the kernel load modules, you
144       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
145       default.
146
147       setsebool -P domain_kernel_load_modules 1
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149
150
151       If you want to allow all domains to execute in fips_mode, you must turn
152       on the fips_mode boolean. Enabled by default.
153
154       setsebool -P fips_mode 1
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156
157
158       If you want to enable reading of urandom for all domains, you must turn
159       on the global_ssp boolean. Disabled by default.
160
161       setsebool -P global_ssp 1
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163
164
165       If  you  want  to allow confined applications to run with kerberos, you
166       must turn on the kerberos_enabled boolean. Enabled by default.
167
168       setsebool -P kerberos_enabled 1
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170
171
172       If you want to allow system to run with  NIS,  you  must  turn  on  the
173       nis_enabled boolean. Disabled by default.
174
175       setsebool -P nis_enabled 1
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177
178
179       If  you  want to allow confined applications to use nscd shared memory,
180       you must turn on the nscd_use_shm boolean. Disabled by default.
181
182       setsebool -P nscd_use_shm 1
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184
185

MANAGED FILES

187       The SELinux process type named_t can manage files labeled with the fol‐
188       lowing  file  types.   The paths listed are the default paths for these
189       file types.  Note the processes UID still need to have DAC permissions.
190
191       cluster_conf_t
192
193            /etc/cluster(/.*)?
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195       cluster_var_lib_t
196
197            /var/lib/pcsd(/.*)?
198            /var/lib/cluster(/.*)?
199            /var/lib/openais(/.*)?
200            /var/lib/pengine(/.*)?
201            /var/lib/corosync(/.*)?
202            /usr/lib/heartbeat(/.*)?
203            /var/lib/heartbeat(/.*)?
204            /var/lib/pacemaker(/.*)?
205
206       cluster_var_run_t
207
208            /var/run/crm(/.*)?
209            /var/run/cman_.*
210            /var/run/rsctmp(/.*)?
211            /var/run/aisexec.*
212            /var/run/heartbeat(/.*)?
213            /var/run/corosync-qnetd(/.*)?
214            /var/run/corosync-qdevice(/.*)?
215            /var/run/cpglockd.pid
216            /var/run/corosync.pid
217            /var/run/rgmanager.pid
218            /var/run/cluster/rgmanager.sk
219
220       dnssec_trigger_var_run_t
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222            /var/run/dnssec.*
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224       ipa_var_lib_t
225
226            /var/lib/ipa(/.*)?
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       krb5_keytab_t
242
243            /etc/krb5.keytab
244            /etc/krb5kdc/kadm5.keytab
245            /var/kerberos/krb5kdc/kadm5.keytab
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247       named_cache_t
248
249            /var/named/data(/.*)?
250            /var/lib/softhsm(/.*)?
251            /var/lib/unbound(/.*)?
252            /var/named/slaves(/.*)?
253            /var/named/dynamic(/.*)?
254            /var/named/chroot/var/tmp(/.*)?
255            /var/named/chroot/var/named/data(/.*)?
256            /var/named/chroot/var/named/slaves(/.*)?
257            /var/named/chroot/var/named/dynamic(/.*)?
258
259       named_log_t
260
261            /var/log/named.*
262            /var/named/chroot/var/log/named.*
263
264       named_tmp_t
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266
267       named_var_run_t
268
269            /var/run/bind(/.*)?
270            /var/run/named(/.*)?
271            /var/run/unbound(/.*)?
272            /var/named/chroot/run/named.*
273            /var/named/chroot/var/run/named.*
274            /var/run/ndc
275
276       named_zone_t
277
278            /var/named(/.*)?
279            /var/named/chroot/var/named(/.*)?
280
281       root_t
282
283            /sysroot/ostree/deploy/.*-atomic.*/deploy(/.*)?
284            /
285            /initrd
286
287

FILE CONTEXTS

289       SELinux requires files to have an extended attribute to define the file
290       type.
291
292       You can see the context of a file using the -Z option to ls
293
294       Policy  governs  the  access  confined  processes  have to these files.
295       SELinux named policy is very flexible allowing  users  to  setup  their
296       named processes in as secure a method as possible.
297
298       EQUIVALENCE DIRECTORIES
299
300
301       named  policy  stores  data  with multiple different file context types
302       under the /var/named directory.  If you would like to store the data in
303       a  different  directory  you  can use the semanage command to create an
304       equivalence mapping.  If you wanted to store this data under  the  /srv
305       dirctory you would execute the following command:
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307       semanage fcontext -a -e /var/named /srv/named
308       restorecon -R -v /srv/named
309
310       STANDARD FILE CONTEXT
311
312       SELinux  defines the file context types for the named, if you wanted to
313       store files with these types in a diffent paths, you  need  to  execute
314       the  semanage  command  to  sepecify  alternate  labeling  and then use
315       restorecon to put the labels on disk.
316
317       semanage fcontext -a -t named_zone_t '/srv/mynamed_content(/.*)?'
318       restorecon -R -v /srv/mynamed_content
319
320       Note: SELinux often uses regular expressions  to  specify  labels  that
321       match multiple files.
322
323       The following file types are defined for named:
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325
326
327       named_cache_t
328
329       - Set files with the named_cache_t type, if you want to store the files
330       under the /var/cache directory.
331
332
333       Paths:
334            /var/named/data(/.*)?,                     /var/lib/softhsm(/.*)?,
335            /var/lib/unbound(/.*)?,                   /var/named/slaves(/.*)?,
336            /var/named/dynamic(/.*)?,         /var/named/chroot/var/tmp(/.*)?,
337            /var/named/chroot/var/named/data(/.*)?,
338            /var/named/chroot/var/named/slaves(/.*)?,
339            /var/named/chroot/var/named/dynamic(/.*)?
340
341
342       named_checkconf_exec_t
343
344       -  Set files with the named_checkconf_exec_t type, if you want to tran‐
345       sition an executable to the named_checkconf_t domain.
346
347
348
349       named_conf_t
350
351       - Set files with the named_conf_t type, if you want to treat the  files
352       as named configuration data, usually stored under the /etc directory.
353
354
355       Paths:
356            /etc/rndc.*,      /etc/unbound(/.*)?,     /var/named/chroot(/.*)?,
357            /etc/named.rfc1912.zones,
358            /var/named/chroot/etc/named.rfc1912.zones,        /etc/named.conf,
359            /var/named/named.ca,                        /etc/named.root.hints,
360            /var/named/chroot/etc/named.conf,         /etc/named.caching-name‐
361            server.conf,                 /var/named/chroot/var/named/named.ca,
362            /var/named/chroot/etc/named.root.hints,
363            /var/named/chroot/etc/named.caching-nameserver.conf
364
365
366       named_exec_t
367
368       - Set files with the named_exec_t type, if you want  to  transition  an
369       executable to the named_t domain.
370
371
372       Paths:
373            /usr/sbin/named,        /usr/sbin/lwresd,       /usr/sbin/unbound,
374            /usr/sbin/named-sdb,  /usr/sbin/named-pkcs11,   /usr/sbin/unbound-
375            anchor, /usr/sbin/unbound-control, /usr/sbin/unbound-checkconf
376
377
378       named_initrc_exec_t
379
380       -  Set  files with the named_initrc_exec_t type, if you want to transi‐
381       tion an executable to the named_initrc_t domain.
382
383
384       Paths:
385            /etc/rc.d/init.d/named,                  /etc/rc.d/init.d/unbound,
386            /etc/rc.d/init.d/named-sdb
387
388
389       named_keytab_t
390
391       -  Set  files  with  the  named_keytab_t type, if you want to treat the
392       files as kerberos keytab files.
393
394
395
396       named_log_t
397
398       - Set files with the named_log_t type, if you want to treat the data as
399       named log data, usually stored under the /var/log directory.
400
401
402       Paths:
403            /var/log/named.*, /var/named/chroot/var/log/named.*
404
405
406       named_tmp_t
407
408       -  Set files with the named_tmp_t type, if you want to store named tem‐
409       porary files in the /tmp directories.
410
411
412
413       named_unit_file_t
414
415       - Set files with the named_unit_file_t type, if you want to  treat  the
416       files as named unit content.
417
418
419       Paths:
420            /usr/lib/systemd/system/named.*,             /usr/lib/systemd/sys‐
421            tem/unbound.*, /usr/lib/systemd/system/named-sdb.*
422
423
424       named_var_run_t
425
426       - Set files with the named_var_run_t type, if you  want  to  store  the
427       named files under the /run or /var/run directory.
428
429
430       Paths:
431            /var/run/bind(/.*)?, /var/run/named(/.*)?, /var/run/unbound(/.*)?,
432            /var/named/chroot/run/named.*,  /var/named/chroot/var/run/named.*,
433            /var/run/ndc
434
435
436       named_zone_t
437
438       -  Set files with the named_zone_t type, if you want to treat the files
439       as named zone data.
440
441
442       Paths:
443            /var/named(/.*)?, /var/named/chroot/var/named(/.*)?
444
445
446       Note: File context can be temporarily modified with the chcon  command.
447       If  you want to permanently change the file context you need to use the
448       semanage fcontext command.  This will modify the SELinux labeling data‐
449       base.  You will need to use restorecon to apply the labels.
450
451

COMMANDS

453       semanage  fcontext  can also be used to manipulate default file context
454       mappings.
455
456       semanage permissive can also be used to manipulate  whether  or  not  a
457       process type is permissive.
458
459       semanage  module can also be used to enable/disable/install/remove pol‐
460       icy modules.
461
462       semanage boolean can also be used to manipulate the booleans
463
464
465       system-config-selinux is a GUI tool available to customize SELinux pol‐
466       icy settings.
467
468

AUTHOR

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