dhcpc_selinux(8)

1dhcpc_selinux(8)             SELinux Policy dhcpc             dhcpc_selinux(8)
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NAME

6       dhcpc_selinux - Security Enhanced Linux Policy for the dhcpc processes
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DESCRIPTION

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

ENTRYPOINTS

23       The dhcpc_t SELinux type can be entered via the dhcpc_exec_t file type.
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25       The default entrypoint paths for the dhcpc_t domain are the following:
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27       /sbin/dhclient.*,   /usr/sbin/dhclient.*,   /sbin/pump,   /sbin/dhcdbd,
28       /sbin/dhcpcd, /usr/sbin/pump, /usr/sbin/dhcdbd, /usr/sbin/dhcpcd
29

PROCESS TYPES

31       SELinux defines process types (domains) for each process running on the
32       system
33
34       You can see the context of a process using the -Z option to ps
35
36       Policy governs the access confined processes have  to  files.   SELinux
37       dhcpc  policy is very flexible allowing users to setup their dhcpc pro‐
38       cesses in as secure a method as possible.
39
40       The following process types are defined for dhcpc:
41
42       dhcpc_t
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44       Note: semanage permissive -a dhcpc_t can be used to  make  the  process
45       type  dhcpc_t  permissive.  SELinux  does not deny access to permissive
46       process types, but the AVC (SELinux denials) messages are still  gener‐
47       ated.
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49

BOOLEANS

51       SELinux  policy  is customizable based on least access required.  dhcpc
52       policy is extremely flexible and has several booleans that allow you to
53       manipulate the policy and run dhcpc with the tightest access possible.
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56
57       If you want to allow dhcpc client applications to execute iptables com‐
58       mands, you must turn on the dhcpc_exec_iptables  boolean.  Disabled  by
59       default.
60
61       setsebool -P dhcpc_exec_iptables 1
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63
64
65       If you want to allow users to resolve user passwd entries directly from
66       ldap rather then using a sssd server, you  must  turn  on  the  authlo‐
67       gin_nsswitch_use_ldap boolean. Disabled by default.
68
69       setsebool -P authlogin_nsswitch_use_ldap 1
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72
73       If you want to allow all daemons to write corefiles to /, you must turn
74       on the daemons_dump_core boolean. Disabled by default.
75
76       setsebool -P daemons_dump_core 1
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78
79
80       If you want to enable cluster mode for daemons, you must  turn  on  the
81       daemons_enable_cluster_mode boolean. Enabled by default.
82
83       setsebool -P daemons_enable_cluster_mode 1
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85
86
87       If  you want to allow all daemons to use tcp wrappers, you must turn on
88       the daemons_use_tcp_wrapper boolean. Disabled by default.
89
90       setsebool -P daemons_use_tcp_wrapper 1
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92
93
94       If you want to allow all daemons the ability to  read/write  terminals,
95       you must turn on the daemons_use_tty boolean. Disabled by default.
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97       setsebool -P daemons_use_tty 1
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100
101       If  you  want  to deny any process from ptracing or debugging any other
102       processes, you  must  turn  on  the  deny_ptrace  boolean.  Enabled  by
103       default.
104
105       setsebool -P deny_ptrace 1
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107
108
109       If  you  want  to  allow  any  process  to mmap any file on system with
110       attribute file_type, you must turn on the  domain_can_mmap_files  bool‐
111       ean. Enabled by default.
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113       setsebool -P domain_can_mmap_files 1
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116
117       If  you want to allow all domains write to kmsg_device, while kernel is
118       executed with systemd.log_target=kmsg parameter, you must turn  on  the
119       domain_can_write_kmsg boolean. Disabled by default.
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121       setsebool -P domain_can_write_kmsg 1
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124
125       If you want to allow all domains to use other domains file descriptors,
126       you must turn on the domain_fd_use boolean. Enabled by default.
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128       setsebool -P domain_fd_use 1
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130
131
132       If you want to allow all domains to have the kernel load  modules,  you
133       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
134       default.
135
136       setsebool -P domain_kernel_load_modules 1
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139
140       If you want to allow all domains to execute in fips_mode, you must turn
141       on the fips_mode boolean. Enabled by default.
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143       setsebool -P fips_mode 1
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146
147       If you want to enable reading of urandom for all domains, you must turn
148       on the global_ssp boolean. Disabled by default.
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150       setsebool -P global_ssp 1
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152
153
154       If you want to allow confined applications to run  with  kerberos,  you
155       must turn on the kerberos_enabled boolean. Enabled by default.
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157       setsebool -P kerberos_enabled 1
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159
160
161       If  you  want  to  allow  system  to run with NIS, you must turn on the
162       nis_enabled boolean. Disabled by default.
163
164       setsebool -P nis_enabled 1
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167
168       If you want to allow confined applications to use nscd  shared  memory,
169       you must turn on the nscd_use_shm boolean. Disabled by default.
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171       setsebool -P nscd_use_shm 1
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174

PORT TYPES

176       SELinux defines port types to represent TCP and UDP ports.
177
178       You  can  see  the  types associated with a port by using the following
179       command:
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181       semanage port -l
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183
184       Policy governs the access  confined  processes  have  to  these  ports.
185       SELinux  dhcpc  policy  is  very flexible allowing users to setup their
186       dhcpc processes in as secure a method as possible.
187
188       The following port types are defined for dhcpc:
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190
191       dhcpc_port_t
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194
195       Default Defined Ports:
196                 tcp 68,546,5546
197                 udp 68,546,5546
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MANAGED FILES

200       The SELinux process type dhcpc_t can manage files labeled with the fol‐
201       lowing  file  types.   The paths listed are the default paths for these
202       file types.  Note the processes UID still need to have DAC permissions.
203
204       NetworkManager_var_lib_t
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206            /var/lib/wicd(/.*)?
207            /var/lib/NetworkManager(/.*)?
208            /etc/dhcp/wired-settings.conf
209            /etc/wicd/wired-settings.conf
210            /etc/dhcp/manager-settings.conf
211            /etc/wicd/manager-settings.conf
212            /etc/dhcp/wireless-settings.conf
213            /etc/wicd/wireless-settings.conf
214
215       cluster_conf_t
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217            /etc/cluster(/.*)?
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219       cluster_var_lib_t
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221            /var/lib/pcsd(/.*)?
222            /var/lib/cluster(/.*)?
223            /var/lib/openais(/.*)?
224            /var/lib/pengine(/.*)?
225            /var/lib/corosync(/.*)?
226            /usr/lib/heartbeat(/.*)?
227            /var/lib/heartbeat(/.*)?
228            /var/lib/pacemaker(/.*)?
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230       cluster_var_run_t
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232            /var/run/crm(/.*)?
233            /var/run/cman_.*
234            /var/run/rsctmp(/.*)?
235            /var/run/aisexec.*
236            /var/run/heartbeat(/.*)?
237            /var/run/corosync-qnetd(/.*)?
238            /var/run/corosync-qdevice(/.*)?
239            /var/run/cpglockd.pid
240            /var/run/corosync.pid
241            /var/run/rgmanager.pid
242            /var/run/cluster/rgmanager.sk
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244       dhcpc_state_t
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246            /var/lib/dhcp3?/dhclient.*
247            /var/lib/dhcpcd(/.*)?
248            /var/lib/dhclient(/.*)?
249            /var/lib/wifiroamd(/.*)?
250
251       dhcpc_tmp_t
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253
254       dhcpc_var_run_t
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256            /var/run/dhcpcd(/.*)?
257            /var/run/dhclient.*
258
259       initrc_var_run_t
260
261            /var/run/utmp
262            /var/run/random-seed
263            /var/run/runlevel.dir
264            /var/run/setmixer_flag
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266       net_conf_t
267
268            /etc/hosts[^/]*
269            /etc/yp.conf.*
270            /etc/denyhosts.*
271            /etc/hosts.deny.*
272            /etc/resolv.conf.*
273            /etc/.resolv.conf.*
274            /etc/resolv-secure.conf.*
275            /var/run/systemd/network(/.*)?
276            /etc/sysconfig/networking(/.*)?
277            /etc/sysconfig/network-scripts(/.*)?
278            /etc/sysconfig/network-scripts/.*resolv.conf
279            /var/run/NetworkManager/resolv.conf.*
280            /etc/ethers
281            /etc/ntp.conf
282            /var/run/systemd/resolve/resolv.conf
283
284       root_t
285
286            /sysroot/ostree/deploy/.*-atomic.*/deploy(/.*)?
287            /
288            /initrd
289
290       systemd_passwd_var_run_t
291
292            /var/run/systemd/ask-password(/.*)?
293            /var/run/systemd/ask-password-block(/.*)?
294
295       virt_lxc_var_run_t
296
297            /var/run/libvirt/lxc(/.*)?
298            /var/run/libvirt-sandbox(/.*)?
299
300       virt_var_run_t
301
302            /var/vdsm(/.*)?
303            /var/run/vdsm(/.*)?
304            /var/run/libvirt(/.*)?
305            /var/run/libvirtd.pid
306            /var/run/qemu-pr-helper.sock
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308

FILE CONTEXTS

310       SELinux requires files to have an extended attribute to define the file
311       type.
312
313       You can see the context of a file using the -Z option to ls
314
315       Policy  governs  the  access  confined  processes  have to these files.
316       SELinux dhcpc policy is very flexible allowing  users  to  setup  their
317       dhcpc processes in as secure a method as possible.
318
319       STANDARD FILE CONTEXT
320
321       SELinux  defines the file context types for the dhcpc, if you wanted to
322       store files with these types in a diffent paths, you  need  to  execute
323       the  semanage  command  to  sepecify  alternate  labeling  and then use
324       restorecon to put the labels on disk.
325
326       semanage fcontext -a -t dhcpc_var_run_t '/srv/mydhcpc_content(/.*)?'
327       restorecon -R -v /srv/mydhcpc_content
328
329       Note: SELinux often uses regular expressions  to  specify  labels  that
330       match multiple files.
331
332       The following file types are defined for dhcpc:
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335
336       dhcpc_exec_t
337
338       -  Set  files  with the dhcpc_exec_t type, if you want to transition an
339       executable to the dhcpc_t domain.
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341
342       Paths:
343            /sbin/dhclient.*, /usr/sbin/dhclient.*, /sbin/pump,  /sbin/dhcdbd,
344            /sbin/dhcpcd, /usr/sbin/pump, /usr/sbin/dhcdbd, /usr/sbin/dhcpcd
345
346
347       dhcpc_helper_exec_t
348
349       -  Set  files with the dhcpc_helper_exec_t type, if you want to transi‐
350       tion an executable to the dhcpc_helper_t domain.
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353
354       dhcpc_state_t
355
356       - Set files with the dhcpc_state_t type, if you want to treat the files
357       as dhcpc state data.
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359
360       Paths:
361            /var/lib/dhcp3?/dhclient.*,                 /var/lib/dhcpcd(/.*)?,
362            /var/lib/dhclient(/.*)?, /var/lib/wifiroamd(/.*)?
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364
365       dhcpc_tmp_t
366
367       - Set files with the dhcpc_tmp_t type, if you want to store dhcpc  tem‐
368       porary files in the /tmp directories.
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370
371
372       dhcpc_var_run_t
373
374       -  Set  files  with  the dhcpc_var_run_t type, if you want to store the
375       dhcpc files under the /run or /var/run directory.
376
377
378       Paths:
379            /var/run/dhcpcd(/.*)?, /var/run/dhclient.*
380
381
382       Note: File context can be temporarily modified with the chcon  command.
383       If  you want to permanently change the file context you need to use the
384       semanage fcontext command.  This will modify the SELinux labeling data‐
385       base.  You will need to use restorecon to apply the labels.
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387

COMMANDS

389       semanage  fcontext  can also be used to manipulate default file context
390       mappings.
391
392       semanage permissive can also be used to manipulate  whether  or  not  a
393       process type is permissive.
394
395       semanage  module can also be used to enable/disable/install/remove pol‐
396       icy modules.
397
398       semanage port can also be used to manipulate the port definitions
399
400       semanage boolean can also be used to manipulate the booleans
401
402
403       system-config-selinux is a GUI tool available to customize SELinux pol‐
404       icy settings.
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406

AUTHOR

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