1nscd_selinux(8) SELinux Policy nscd nscd_selinux(8)
2
3
4
6 nscd_selinux - Security Enhanced Linux Policy for the nscd processes
7
9 Security-Enhanced Linux secures the nscd processes via flexible manda‐
10 tory access control.
11
12 The nscd processes execute with the nscd_t SELinux type. You can check
13 if you have these processes running by executing the ps command with
14 the -Z qualifier.
15
16 For example:
17
18 ps -eZ | grep nscd_t
19
20
21
23 The nscd_t SELinux type can be entered via the nscd_exec_t file type.
24
25 The default entrypoint paths for the nscd_t domain are the following:
26
27 /usr/sbin/nscd
28
30 SELinux defines process types (domains) for each process running on the
31 system
32
33 You can see the context of a process using the -Z option to ps
34
35 Policy governs the access confined processes have to files. SELinux
36 nscd policy is very flexible allowing users to setup their nscd pro‐
37 cesses in as secure a method as possible.
38
39 The following process types are defined for nscd:
40
41 nscd_t
42
43 Note: semanage permissive -a nscd_t can be used to make the process
44 type nscd_t permissive. SELinux does not deny access to permissive
45 process types, but the AVC (SELinux denials) messages are still gener‐
46 ated.
47
48
50 SELinux policy is customizable based on least access required. nscd
51 policy is extremely flexible and has several booleans that allow you to
52 manipulate the policy and run nscd with the tightest access possible.
53
54
55
56 If you want to allow confined applications to use nscd shared memory,
57 you must turn on the nscd_use_shm boolean. Disabled by default.
58
59 setsebool -P nscd_use_shm 1
60
61
62
63 If you want to allow users to resolve user passwd entries directly from
64 ldap rather then using a sssd server, you must turn on the authlo‐
65 gin_nsswitch_use_ldap boolean. Disabled by default.
66
67 setsebool -P authlogin_nsswitch_use_ldap 1
68
69
70
71 If you want to allow all domains to execute in fips_mode, you must turn
72 on the fips_mode boolean. Enabled by default.
73
74 setsebool -P fips_mode 1
75
76
77
78 If you want to allow confined applications to run with kerberos, you
79 must turn on the kerberos_enabled boolean. Enabled by default.
80
81 setsebool -P kerberos_enabled 1
82
83
84
85 If you want to allow system to run with NIS, you must turn on the
86 nis_enabled boolean. Disabled by default.
87
88 setsebool -P nis_enabled 1
89
90
91
92 If you want to allow samba to act as the domain controller, add users,
93 groups and change passwords, you must turn on the samba_domain_con‐
94 troller boolean. Disabled by default.
95
96 setsebool -P samba_domain_controller 1
97
98
99
101 The SELinux process type nscd_t can manage files labeled with the fol‐
102 lowing file types. The paths listed are the default paths for these
103 file types. Note the processes UID still need to have DAC permissions.
104
105 cluster_conf_t
106
107 /etc/cluster(/.*)?
108
109 cluster_var_lib_t
110
111 /var/lib/pcsd(/.*)?
112 /var/lib/cluster(/.*)?
113 /var/lib/openais(/.*)?
114 /var/lib/pengine(/.*)?
115 /var/lib/corosync(/.*)?
116 /usr/lib/heartbeat(/.*)?
117 /var/lib/heartbeat(/.*)?
118 /var/lib/pacemaker(/.*)?
119
120 cluster_var_run_t
121
122 /var/run/crm(/.*)?
123 /var/run/cman_.*
124 /var/run/rsctmp(/.*)?
125 /var/run/aisexec.*
126 /var/run/heartbeat(/.*)?
127 /var/run/corosync-qnetd(/.*)?
128 /var/run/corosync-qdevice(/.*)?
129 /var/run/corosync.pid
130 /var/run/cpglockd.pid
131 /var/run/rgmanager.pid
132 /var/run/cluster/rgmanager.sk
133
134 nscd_log_t
135
136 /var/log/nscd.log.*
137
138 nscd_var_run_t
139
140 /var/db/nscd(/.*)?
141 /var/run/nscd(/.*)?
142 /var/cache/nscd(/.*)?
143 /var/run/nscd.pid
144 /var/run/.nscd_socket
145
146 root_t
147
148 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
149 /
150 /initrd
151
152 security_t
153
154 /selinux
155
156
158 SELinux requires files to have an extended attribute to define the file
159 type.
160
161 You can see the context of a file using the -Z option to ls
162
163 Policy governs the access confined processes have to these files.
164 SELinux nscd policy is very flexible allowing users to setup their nscd
165 processes in as secure a method as possible.
166
167 EQUIVALENCE DIRECTORIES
168
169
170 nscd policy stores data with multiple different file context types
171 under the /var/run/nscd directory. If you would like to store the data
172 in a different directory you can use the semanage command to create an
173 equivalence mapping. If you wanted to store this data under the /srv
174 dirctory you would execute the following command:
175
176 semanage fcontext -a -e /var/run/nscd /srv/nscd
177 restorecon -R -v /srv/nscd
178
179 STANDARD FILE CONTEXT
180
181 SELinux defines the file context types for the nscd, if you wanted to
182 store files with these types in a diffent paths, you need to execute
183 the semanage command to sepecify alternate labeling and then use
184 restorecon to put the labels on disk.
185
186 semanage fcontext -a -t nscd_log_t '/srv/mynscd_content(/.*)?'
187 restorecon -R -v /srv/mynscd_content
188
189 Note: SELinux often uses regular expressions to specify labels that
190 match multiple files.
191
192 The following file types are defined for nscd:
193
194
195
196 nscd_exec_t
197
198 - Set files with the nscd_exec_t type, if you want to transition an
199 executable to the nscd_t domain.
200
201
202
203 nscd_initrc_exec_t
204
205 - Set files with the nscd_initrc_exec_t type, if you want to transition
206 an executable to the nscd_initrc_t domain.
207
208
209
210 nscd_log_t
211
212 - Set files with the nscd_log_t type, if you want to treat the data as
213 nscd log data, usually stored under the /var/log directory.
214
215
216
217 nscd_unit_file_t
218
219 - Set files with the nscd_unit_file_t type, if you want to treat the
220 files as nscd unit content.
221
222
223
224 nscd_var_run_t
225
226 - Set files with the nscd_var_run_t type, if you want to store the nscd
227 files under the /run or /var/run directory.
228
229
230 Paths:
231 /var/db/nscd(/.*)?, /var/run/nscd(/.*)?, /var/cache/nscd(/.*)?,
232 /var/run/nscd.pid, /var/run/.nscd_socket
233
234
235 Note: File context can be temporarily modified with the chcon command.
236 If you want to permanently change the file context you need to use the
237 semanage fcontext command. This will modify the SELinux labeling data‐
238 base. You will need to use restorecon to apply the labels.
239
240
242 semanage fcontext can also be used to manipulate default file context
243 mappings.
244
245 semanage permissive can also be used to manipulate whether or not a
246 process type is permissive.
247
248 semanage module can also be used to enable/disable/install/remove pol‐
249 icy modules.
250
251 semanage boolean can also be used to manipulate the booleans
252
253
254 system-config-selinux is a GUI tool available to customize SELinux pol‐
255 icy settings.
256
257
259 This manual page was auto-generated using sepolicy manpage .
260
261
263 selinux(8), nscd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
264 setsebool(8)
265
266
267
268nscd 19-05-30 nscd_selinux(8)