1chronyd_selinux(8) SELinux Policy chronyd chronyd_selinux(8)
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6 chronyd_selinux - Security Enhanced Linux Policy for the chronyd pro‐
7 cesses
8
10 Security-Enhanced Linux secures the chronyd processes via flexible
11 mandatory access control.
12 The chronyd processes execute with the chronyd_t SELinux type. You can
14 check if you have these processes running by executing the ps command
15 with the -Z qualifier.
16 For example:
18 ps -eZ | grep chronyd_t
20
24 The chronyd_t SELinux type can be entered via the chronyd_exec_t file
25 type.
26 The default entrypoint paths for the chronyd_t domain are the follow‐
28 ing:
29 /usr/sbin/chronyd, /usr/libexec/chrony-helper
31
33 SELinux defines process types (domains) for each process running on the
34 system
35 You can see the context of a process using the -Z option to ps
37 Policy governs the access confined processes have to files. SELinux
39 chronyd policy is very flexible allowing users to setup their chronyd
40 processes in as secure a method as possible.
41 The following process types are defined for chronyd:
43 chronyd_t
45 Note: semanage permissive -a chronyd_t can be used to make the process
47 type chronyd_t permissive. SELinux does not deny access to permissive
48 process types, but the AVC (SELinux denials) messages are still gener‐
49 ated.
50
53 SELinux policy is customizable based on least access required. chronyd
54 policy is extremely flexible and has several booleans that allow you to
55 manipulate the policy and run chronyd with the tightest access possi‐
56 ble.
57 If you want to allow all domains to execute in fips_mode, you must turn
61 on the fips_mode boolean. Enabled by default.
62 setsebool -P fips_mode 1
64
68 SELinux defines port types to represent TCP and UDP ports.
69 You can see the types associated with a port by using the following
71 command:
72 semanage port -l
74 Policy governs the access confined processes have to these ports.
77 SELinux chronyd policy is very flexible allowing users to setup their
78 chronyd processes in as secure a method as possible.
79 The following port types are defined for chronyd:
81 chronyd_port_t
84 Default Defined Ports:
88 udp 323
89
91 The SELinux process type chronyd_t can manage files labeled with the
92 following file types. The paths listed are the default paths for these
93 file types. Note the processes UID still need to have DAC permissions.
94 chronyd_tmp_t
96 chronyd_tmpfs_t
99 chronyd_var_lib_t
102 /var/lib/chrony(/.*)?
104 chronyd_var_run_t
106 /var/run/chrony(/.*)?
108 /var/run/chronyd(/.*)?
109 /var/run/chrony-dhcp(/.*)?
110 /var/run/chrony-helper(/.*)?
111 /var/run/chronyd.pid
112 /var/run/chronyd.sock
113 cluster_conf_t
115 /etc/cluster(/.*)?
117 cluster_var_lib_t
119 /var/lib/pcsd(/.*)?
121 /var/lib/cluster(/.*)?
122 /var/lib/openais(/.*)?
123 /var/lib/pengine(/.*)?
124 /var/lib/corosync(/.*)?
125 /usr/lib/heartbeat(/.*)?
126 /var/lib/heartbeat(/.*)?
127 /var/lib/pacemaker(/.*)?
128 cluster_var_run_t
130 /var/run/crm(/.*)?
132 /var/run/cman_.*
133 /var/run/rsctmp(/.*)?
134 /var/run/aisexec.*
135 /var/run/heartbeat(/.*)?
136 /var/run/pcsd-ruby.socket
137 /var/run/corosync-qnetd(/.*)?
138 /var/run/corosync-qdevice(/.*)?
139 /var/run/corosync.pid
140 /var/run/cpglockd.pid
141 /var/run/rgmanager.pid
142 /var/run/cluster/rgmanager.sk
143 gpsd_tmpfs_t
145 krb5_host_rcache_t
148 /var/tmp/krb5_0.rcache2
150 /var/cache/krb5rcache(/.*)?
151 /var/tmp/nfs_0
152 /var/tmp/DNS_25
153 /var/tmp/host_0
154 /var/tmp/imap_0
155 /var/tmp/HTTP_23
156 /var/tmp/HTTP_48
157 /var/tmp/ldap_55
158 /var/tmp/ldap_487
159 /var/tmp/ldapmap1_0
160 root_t
162 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
164 /
165 /initrd
166 systemd_passwd_var_run_t
168 /var/run/systemd/ask-password(/.*)?
170 /var/run/systemd/ask-password-block(/.*)?
171 timemaster_tmpfs_t
173
177 SELinux requires files to have an extended attribute to define the file
178 type.
179 You can see the context of a file using the -Z option to ls
181 Policy governs the access confined processes have to these files.
183 SELinux chronyd policy is very flexible allowing users to setup their
184 chronyd processes in as secure a method as possible.
185 EQUIVALENCE DIRECTORIES
187 chronyd policy stores data with multiple different file context types
190 under the /var/run/chrony directory. If you would like to store the
191 data in a different directory you can use the semanage command to cre‐
192 ate an equivalence mapping. If you wanted to store this data under the
193 /srv directory you would execute the following command:
194 semanage fcontext -a -e /var/run/chrony /srv/chrony
196 restorecon -R -v /srv/chrony
197 STANDARD FILE CONTEXT
199 SELinux defines the file context types for the chronyd, if you wanted
201 to store files with these types in a diffent paths, you need to execute
202 the semanage command to specify alternate labeling and then use re‐
203 storecon to put the labels on disk.
204 semanage fcontext -a -t chronyd_tmp_t '/srv/mychronyd_content(/.*)?'
206 restorecon -R -v /srv/mychronyd_content
207 Note: SELinux often uses regular expressions to specify labels that
209 match multiple files.
210 The following file types are defined for chronyd:
212 chronyd_exec_t
216 - Set files with the chronyd_exec_t type, if you want to transition an
218 executable to the chronyd_t domain.
219 Paths:
222 /usr/sbin/chronyd, /usr/libexec/chrony-helper
223 chronyd_initrc_exec_t
226 - Set files with the chronyd_initrc_exec_t type, if you want to transi‐
228 tion an executable to the chronyd_initrc_t domain.
229 chronyd_keys_t
233 - Set files with the chronyd_keys_t type, if you want to treat the
235 files as chronyd keys data.
236 chronyd_tmp_t
240 - Set files with the chronyd_tmp_t type, if you want to store chronyd
242 temporary files in the /tmp directories.
243 chronyd_tmpfs_t
247 - Set files with the chronyd_tmpfs_t type, if you want to store chronyd
249 files on a tmpfs file system.
250 chronyd_unit_file_t
254 - Set files with the chronyd_unit_file_t type, if you want to treat the
256 files as chronyd unit content.
257 chronyd_var_lib_t
261 - Set files with the chronyd_var_lib_t type, if you want to store the
263 chronyd files under the /var/lib directory.
264 chronyd_var_log_t
268 - Set files with the chronyd_var_log_t type, if you want to treat the
270 data as chronyd var log data, usually stored under the /var/log direc‐
271 tory.
272 chronyd_var_run_t
276 - Set files with the chronyd_var_run_t type, if you want to store the
278 chronyd files under the /run or /var/run directory.
279 Paths:
282 /var/run/chrony(/.*)?, /var/run/chronyd(/.*)?, /var/run/chrony-
283 dhcp(/.*)?, /var/run/chrony-helper(/.*)?, /var/run/chronyd.pid,
284 /var/run/chronyd.sock
285 Note: File context can be temporarily modified with the chcon command.
288 If you want to permanently change the file context you need to use the
289 semanage fcontext command. This will modify the SELinux labeling data‐
290 base. You will need to use restorecon to apply the labels.
291
294 semanage fcontext can also be used to manipulate default file context
295 mappings.
296 semanage permissive can also be used to manipulate whether or not a
298 process type is permissive.
299 semanage module can also be used to enable/disable/install/remove pol‐
301 icy modules.
302 semanage port can also be used to manipulate the port definitions
304 semanage boolean can also be used to manipulate the booleans
306 system-config-selinux is a GUI tool available to customize SELinux pol‐
309 icy settings.
310
313 This manual page was auto-generated using sepolicy manpage .
314
317 selinux(8), chronyd(8), semanage(8), restorecon(8), chcon(1), sepol‐
318 icy(8), setsebool(8)
319chronyd 21-11-19 chronyd_selinux(8)