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:
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18       ps -eZ | grep dhcpc_t
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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
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PROCESS TYPES

31       SELinux defines process types (domains) for each process running on the
32       system
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34       You can see the context of a process using the -Z option to ps
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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:
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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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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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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.
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69       setsebool -P authlogin_nsswitch_use_ldap 1
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73       If you want to allow all domains to execute in fips_mode, you must turn
74       on the fips_mode boolean. Enabled by default.
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76       setsebool -P fips_mode 1
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80       If you want to allow confined applications to run  with  kerberos,  you
81       must turn on the kerberos_enabled boolean. Enabled by default.
82
83       setsebool -P kerberos_enabled 1
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87       If  you  want  to  allow  system  to run with NIS, you must turn on the
88       nis_enabled boolean. Disabled by default.
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90       setsebool -P nis_enabled 1
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94       If you want to allow confined applications to use nscd  shared  memory,
95       you must turn on the nscd_use_shm boolean. Disabled by default.
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97       setsebool -P nscd_use_shm 1
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PORT TYPES

102       SELinux defines port types to represent TCP and UDP ports.
103
104       You  can  see  the  types associated with a port by using the following
105       command:
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107       semanage port -l
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109
110       Policy governs the access  confined  processes  have  to  these  ports.
111       SELinux  dhcpc  policy  is  very flexible allowing users to setup their
112       dhcpc processes in as secure a method as possible.
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114       The following port types are defined for dhcpc:
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116
117       dhcpc_port_t
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120
121       Default Defined Ports:
122                 tcp 68,546,5546
123                 udp 68,546,5546
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MANAGED FILES

126       The SELinux process type dhcpc_t can manage files labeled with the fol‐
127       lowing  file  types.   The paths listed are the default paths for these
128       file types.  Note the processes UID still need to have DAC permissions.
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130       NetworkManager_var_lib_t
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132            /var/lib/wicd(/.*)?
133            /var/lib/NetworkManager(/.*)?
134            /etc/dhcp/wired-settings.conf
135            /etc/wicd/wired-settings.conf
136            /etc/dhcp/manager-settings.conf
137            /etc/wicd/manager-settings.conf
138            /etc/dhcp/wireless-settings.conf
139            /etc/wicd/wireless-settings.conf
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141       cluster_conf_t
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143            /etc/cluster(/.*)?
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145       cluster_var_lib_t
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147            /var/lib/pcsd(/.*)?
148            /var/lib/cluster(/.*)?
149            /var/lib/openais(/.*)?
150            /var/lib/pengine(/.*)?
151            /var/lib/corosync(/.*)?
152            /usr/lib/heartbeat(/.*)?
153            /var/lib/heartbeat(/.*)?
154            /var/lib/pacemaker(/.*)?
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156       cluster_var_run_t
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158            /var/run/crm(/.*)?
159            /var/run/cman_.*
160            /var/run/rsctmp(/.*)?
161            /var/run/aisexec.*
162            /var/run/heartbeat(/.*)?
163            /var/run/corosync-qnetd(/.*)?
164            /var/run/corosync-qdevice(/.*)?
165            /var/run/corosync.pid
166            /var/run/cpglockd.pid
167            /var/run/rgmanager.pid
168            /var/run/cluster/rgmanager.sk
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170       dhcpc_state_t
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172            /var/lib/dhcp3?/dhclient.*
173            /var/lib/dhcpcd(/.*)?
174            /var/lib/dhclient(/.*)?
175            /var/lib/wifiroamd(/.*)?
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177       dhcpc_tmp_t
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180       dhcpc_var_run_t
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182            /var/run/dhcpcd(/.*)?
183            /var/run/dhclient.*
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185       initrc_var_run_t
186
187            /var/run/utmp
188            /var/run/random-seed
189            /var/run/runlevel.dir
190            /var/run/setmixer_flag
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192       net_conf_t
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194            /etc/hosts[^/]*
195            /etc/yp.conf.*
196            /etc/denyhosts.*
197            /etc/hosts.deny.*
198            /etc/resolv.conf.*
199            /etc/.resolv.conf.*
200            /etc/resolv-secure.conf.*
201            /var/run/cloud-init(/.*)?
202            /var/run/systemd/network(/.*)?
203            /etc/sysconfig/networking(/.*)?
204            /etc/sysconfig/network-scripts(/.*)?
205            /etc/sysconfig/network-scripts/.*resolv.conf
206            /var/run/NetworkManager/resolv.conf.*
207            /etc/ethers
208            /etc/ntp.conf
209            /var/run/systemd/resolve/resolv.conf
210            /var/run/systemd/resolve/stub-resolv.conf
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212       root_t
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214            /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
215            /
216            /initrd
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218       systemd_passwd_var_run_t
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220            /var/run/systemd/ask-password(/.*)?
221            /var/run/systemd/ask-password-block(/.*)?
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223       virt_lxc_var_run_t
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225            /var/run/libvirt/lxc(/.*)?
226            /var/run/libvirt-sandbox(/.*)?
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228       virt_var_run_t
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230            /var/vdsm(/.*)?
231            /var/run/vdsm(/.*)?
232            /var/run/libvirt(/.*)?
233            /var/run/libvirtd.pid
234            /var/run/qemu-pr-helper.sock
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FILE CONTEXTS

238       SELinux requires files to have an extended attribute to define the file
239       type.
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241       You can see the context of a file using the -Z option to ls
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243       Policy  governs  the  access  confined  processes  have to these files.
244       SELinux dhcpc policy is very flexible allowing  users  to  setup  their
245       dhcpc processes in as secure a method as possible.
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247       STANDARD FILE CONTEXT
248
249       SELinux  defines the file context types for the dhcpc, if you wanted to
250       store files with these types in a diffent paths, you  need  to  execute
251       the  semanage  command  to  sepecify  alternate  labeling  and then use
252       restorecon to put the labels on disk.
253
254       semanage fcontext -a -t dhcpc_var_run_t '/srv/mydhcpc_content(/.*)?'
255       restorecon -R -v /srv/mydhcpc_content
256
257       Note: SELinux often uses regular expressions  to  specify  labels  that
258       match multiple files.
259
260       The following file types are defined for dhcpc:
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264       dhcpc_exec_t
265
266       -  Set  files  with the dhcpc_exec_t type, if you want to transition an
267       executable to the dhcpc_t domain.
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269
270       Paths:
271            /sbin/dhclient.*, /usr/sbin/dhclient.*, /sbin/pump,  /sbin/dhcdbd,
272            /sbin/dhcpcd, /usr/sbin/pump, /usr/sbin/dhcdbd, /usr/sbin/dhcpcd
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274
275       dhcpc_helper_exec_t
276
277       -  Set  files with the dhcpc_helper_exec_t type, if you want to transi‐
278       tion an executable to the dhcpc_helper_t domain.
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282       dhcpc_state_t
283
284       - Set files with the dhcpc_state_t type, if you want to treat the files
285       as dhcpc state data.
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287
288       Paths:
289            /var/lib/dhcp3?/dhclient.*,                 /var/lib/dhcpcd(/.*)?,
290            /var/lib/dhclient(/.*)?, /var/lib/wifiroamd(/.*)?
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293       dhcpc_tmp_t
294
295       - Set files with the dhcpc_tmp_t type, if you want to store dhcpc  tem‐
296       porary files in the /tmp directories.
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300       dhcpc_var_run_t
301
302       -  Set  files  with  the dhcpc_var_run_t type, if you want to store the
303       dhcpc files under the /run or /var/run directory.
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305
306       Paths:
307            /var/run/dhcpcd(/.*)?, /var/run/dhclient.*
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309
310       Note: File context can be temporarily modified with the chcon  command.
311       If  you want to permanently change the file context you need to use the
312       semanage fcontext command.  This will modify the SELinux labeling data‐
313       base.  You will need to use restorecon to apply the labels.
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COMMANDS

317       semanage  fcontext  can also be used to manipulate default file context
318       mappings.
319
320       semanage permissive can also be used to manipulate  whether  or  not  a
321       process type is permissive.
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323       semanage  module can also be used to enable/disable/install/remove pol‐
324       icy modules.
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326       semanage port can also be used to manipulate the port definitions
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328       semanage boolean can also be used to manipulate the booleans
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331       system-config-selinux is a GUI tool available to customize SELinux pol‐
332       icy settings.
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AUTHOR

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