dhcpd_selinux(8)

1dhcpd_selinux(8)             SELinux Policy dhcpd             dhcpd_selinux(8)
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NAME

6       dhcpd_selinux - Security Enhanced Linux Policy for the dhcpd processes
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DESCRIPTION

9       Security-Enhanced Linux secures the dhcpd processes via flexible manda‐
10       tory access control.
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12       The dhcpd processes execute with the  dhcpd_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 dhcpd_t
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ENTRYPOINTS

23       The dhcpd_t SELinux type can be entered via the dhcpd_exec_t file type.
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25       The default entrypoint paths for the dhcpd_t domain are the following:
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27       /usr/sbin/dhcpd(6)?, /usr/sbin/dhcrelay(6)?
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PROCESS TYPES

30       SELinux defines process types (domains) for each process running on the
31       system
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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       dhcpd policy is very flexible allowing users to setup their dhcpd  pro‐
37       cesses in as secure a method as possible.
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39       The following process types are defined for dhcpd:
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41       dhcpd_t
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43       Note:  semanage  permissive  -a dhcpd_t can be used to make the process
44       type dhcpd_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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BOOLEANS

50       SELinux policy is customizable based on least access  required.   dhcpd
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run dhcpd with the tightest access possible.
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56       If you want to determine whether DHCP daemon can use LDAP backends, you
57       must turn on the dhcpd_use_ldap boolean. Disabled by default.
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59       setsebool -P dhcpd_use_ldap 1
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63       If you want to allow all domains to execute in fips_mode, you must turn
64       on the fips_mode boolean. Enabled by default.
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66       setsebool -P fips_mode 1
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PORT TYPES

71       SELinux defines port types to represent TCP and UDP ports.
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73       You can see the types associated with a port  by  using  the  following
74       command:
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76       semanage port -l
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79       Policy  governs  the  access  confined  processes  have to these ports.
80       SELinux dhcpd policy is very flexible allowing  users  to  setup  their
81       dhcpd processes in as secure a method as possible.
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83       The following port types are defined for dhcpd:
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85
86       dhcpd_port_t
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90       Default Defined Ports:
91                 tcp 547,548,647,847,7911
92                 udp 67,547,548,647,847
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MANAGED FILES

95       The SELinux process type dhcpd_t can manage files labeled with the fol‐
96       lowing file types.  The paths listed are the default  paths  for  these
97       file types.  Note the processes UID still need to have DAC permissions.
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99       cluster_conf_t
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101            /etc/cluster(/.*)?
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103       cluster_var_lib_t
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105            /var/lib/pcsd(/.*)?
106            /var/lib/cluster(/.*)?
107            /var/lib/openais(/.*)?
108            /var/lib/pengine(/.*)?
109            /var/lib/corosync(/.*)?
110            /usr/lib/heartbeat(/.*)?
111            /var/lib/heartbeat(/.*)?
112            /var/lib/pacemaker(/.*)?
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114       cluster_var_run_t
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116            /var/run/crm(/.*)?
117            /var/run/cman_.*
118            /var/run/rsctmp(/.*)?
119            /var/run/aisexec.*
120            /var/run/heartbeat(/.*)?
121            /var/run/corosync-qnetd(/.*)?
122            /var/run/corosync-qdevice(/.*)?
123            /var/run/corosync.pid
124            /var/run/cpglockd.pid
125            /var/run/rgmanager.pid
126            /var/run/cluster/rgmanager.sk
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128       dhcpd_state_t
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130            /var/lib/dhcp(3)?/dhcpd.leases.*
131            /var/lib/dhcpd(/.*)?
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133       dhcpd_var_run_t
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135            /var/run/dhcpd(6)?.pid
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137       root_t
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139            /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
140            /
141            /initrd
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FILE CONTEXTS

145       SELinux requires files to have an extended attribute to define the file
146       type.
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148       You can see the context of a file using the -Z option to ls
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150       Policy governs the access  confined  processes  have  to  these  files.
151       SELinux  dhcpd  policy  is  very flexible allowing users to setup their
152       dhcpd processes in as secure a method as possible.
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154       STANDARD FILE CONTEXT
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156       SELinux defines the file context types for the dhcpd, if you wanted  to
157       store  files  with  these types in a diffent paths, you need to execute
158       the semanage command  to  sepecify  alternate  labeling  and  then  use
159       restorecon to put the labels on disk.
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161       semanage fcontext -a -t dhcpd_var_run_t '/srv/mydhcpd_content(/.*)?'
162       restorecon -R -v /srv/mydhcpd_content
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164       Note:  SELinux  often  uses  regular expressions to specify labels that
165       match multiple files.
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167       The following file types are defined for dhcpd:
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171       dhcpd_exec_t
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173       - Set files with the dhcpd_exec_t type, if you want  to  transition  an
174       executable to the dhcpd_t domain.
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177       Paths:
178            /usr/sbin/dhcpd(6)?, /usr/sbin/dhcrelay(6)?
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181       dhcpd_initrc_exec_t
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183       -  Set  files with the dhcpd_initrc_exec_t type, if you want to transi‐
184       tion an executable to the dhcpd_initrc_t domain.
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187       Paths:
188            /etc/rc.d/init.d/dhcpd(6)?, /etc/rc.d/init.d/dhcrelay(6)?
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191       dhcpd_state_t
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193       - Set files with the dhcpd_state_t type, if you want to treat the files
194       as dhcpd state data.
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197       Paths:
198            /var/lib/dhcp(3)?/dhcpd.leases.*, /var/lib/dhcpd(/.*)?
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201       dhcpd_tmp_t
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203       -  Set files with the dhcpd_tmp_t type, if you want to store dhcpd tem‐
204       porary files in the /tmp directories.
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208       dhcpd_unit_file_t
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210       - Set files with the dhcpd_unit_file_t type, if you want to  treat  the
211       files as dhcpd unit content.
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214       Paths:
215            /usr/lib/systemd/system/dhcpd.*, /usr/lib/systemd/system/dhcpcd.*,
216            /usr/lib/systemd/system/dhcpd6.*,   /usr/lib/systemd/system/dhcre‐
217            lay.*
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220       dhcpd_var_run_t
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222       -  Set  files  with  the dhcpd_var_run_t type, if you want to store the
223       dhcpd files under the /run or /var/run directory.
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227       Note: File context can be temporarily modified with the chcon  command.
228       If  you want to permanently change the file context you need to use the
229       semanage fcontext command.  This will modify the SELinux labeling data‐
230       base.  You will need to use restorecon to apply the labels.
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COMMANDS

234       semanage  fcontext  can also be used to manipulate default file context
235       mappings.
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237       semanage permissive can also be used to manipulate  whether  or  not  a
238       process type is permissive.
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240       semanage  module can also be used to enable/disable/install/remove pol‐
241       icy modules.
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243       semanage port can also be used to manipulate the port definitions
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245       semanage boolean can also be used to manipulate the booleans
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247
248       system-config-selinux is a GUI tool available to customize SELinux pol‐
249       icy settings.
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AUTHOR

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