1inetd_child_selinux(8) SELinux Policy inetd_child inetd_child_selinux(8)
2
6 inetd_child_selinux - Security Enhanced Linux Policy for the
7 inetd_child processes
8
10 Security-Enhanced Linux secures the inetd_child processes via flexible
11 mandatory access control.
12 The inetd_child processes execute with the inetd_child_t SELinux type.
14 You can check if you have these processes running by executing the ps
15 command with the -Z qualifier.
16 For example:
18 ps -eZ | grep inetd_child_t
20
24 The inetd_child_t SELinux type can be entered via the
25 inetd_child_exec_t, usr_t, bin_t file types.
26 The default entrypoint paths for the inetd_child_t domain are the fol‐
28 lowing:
29 All executeables with the default executable label, usually stored in
31 /usr/bin and /usr/sbin. /usr/sbin/in..*d,
32 /usr/lib/pysieved/pysieved.*.py, /usr/local/lib/pysieved/pysieved.*.py,
33 /usr/sbin/identd, /usr/.*, /opt/.*, /emul/.*, /ostree(/.*)?,
34 /export(/.*)?, /usr/doc(/.*)?/lib(/.*)?, /usr/inclu.e(/.*)?,
35 /usr/share/doc(/.*)?/README.*, /usr, /opt, /emul
36
38 SELinux defines process types (domains) for each process running on the
39 system
40 You can see the context of a process using the -Z option to ps
42 Policy governs the access confined processes have to files. SELinux
44 inetd_child policy is very flexible allowing users to setup their
45 inetd_child processes in as secure a method as possible.
46 The following process types are defined for inetd_child:
48 inetd_child_t
50 Note: semanage permissive -a inetd_child_t can be used to make the
52 process type inetd_child_t permissive. SELinux does not deny access to
53 permissive process types, but the AVC (SELinux denials) messages are
54 still generated.
55
58 SELinux policy is customizable based on least access required.
59 inetd_child policy is extremely flexible and has several booleans that
60 allow you to manipulate the policy and run inetd_child with the tight‐
61 est access possible.
62 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 setsebool -P authlogin_nsswitch_use_ldap 1
70 If you want to deny user domains applications to map a memory region as
74 both executable and writable, this is dangerous and the executable
75 should be reported in bugzilla, you must turn on the deny_execmem bool‐
76 ean. Enabled by default.
77 setsebool -P deny_execmem 1
79 If you want to deny any process from ptracing or debugging any other
83 processes, you must turn on the deny_ptrace boolean. Enabled by
84 default.
85 setsebool -P deny_ptrace 1
87 If you want to allow any process to mmap any file on system with
91 attribute file_type, you must turn on the domain_can_mmap_files bool‐
92 ean. Enabled by default.
93 setsebool -P domain_can_mmap_files 1
95 If you want to allow all domains write to kmsg_device, while kernel is
99 executed with systemd.log_target=kmsg parameter, you must turn on the
100 domain_can_write_kmsg boolean. Disabled by default.
101 setsebool -P domain_can_write_kmsg 1
103 If you want to allow all domains to use other domains file descriptors,
107 you must turn on the domain_fd_use boolean. Enabled by default.
108 setsebool -P domain_fd_use 1
110 If you want to allow all domains to have the kernel load modules, you
114 must turn on the domain_kernel_load_modules boolean. Disabled by
115 default.
116 setsebool -P domain_kernel_load_modules 1
118 If you want to allow all domains to execute in fips_mode, you must turn
122 on the fips_mode boolean. Enabled by default.
123 setsebool -P fips_mode 1
125 If you want to enable reading of urandom for all domains, you must turn
129 on the global_ssp boolean. Disabled by default.
130 setsebool -P global_ssp 1
132 If you want to allow confined applications to run with kerberos, you
136 must turn on the kerberos_enabled boolean. Enabled by default.
137 setsebool -P kerberos_enabled 1
139 If you want to control the ability to mmap a low area of the address
143 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
144 the mmap_low_allowed boolean. Disabled by default.
145 setsebool -P mmap_low_allowed 1
147 If you want to allow system to run with NIS, you must turn on the
151 nis_enabled boolean. Disabled by default.
152 setsebool -P nis_enabled 1
154 If you want to allow confined applications to use nscd shared memory,
158 you must turn on the nscd_use_shm boolean. Disabled by default.
159 setsebool -P nscd_use_shm 1
161 If you want to disable kernel module loading, you must turn on the
165 secure_mode_insmod boolean. Enabled by default.
166 setsebool -P secure_mode_insmod 1
168 If you want to boolean to determine whether the system permits loading
172 policy, setting enforcing mode, and changing boolean values. Set this
173 to true and you have to reboot to set it back, you must turn on the
174 secure_mode_policyload boolean. Enabled by default.
175 setsebool -P secure_mode_policyload 1
177 If you want to allow unconfined executables to make their heap memory
181 executable. Doing this is a really bad idea. Probably indicates a
182 badly coded executable, but could indicate an attack. This executable
183 should be reported in bugzilla, you must turn on the selin‐
184 uxuser_execheap boolean. Disabled by default.
185 setsebool -P selinuxuser_execheap 1
187 If you want to allow all unconfined executables to use libraries
191 requiring text relocation that are not labeled textrel_shlib_t, you
192 must turn on the selinuxuser_execmod boolean. Enabled by default.
193 setsebool -P selinuxuser_execmod 1
195 If you want to allow unconfined executables to make their stack exe‐
199 cutable. This should never, ever be necessary. Probably indicates a
200 badly coded executable, but could indicate an attack. This executable
201 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
202 stack boolean. Enabled by default.
203 setsebool -P selinuxuser_execstack 1
205 If you want to support X userspace object manager, you must turn on the
209 xserver_object_manager boolean. Enabled by default.
210 setsebool -P xserver_object_manager 1
212
216 SELinux defines port types to represent TCP and UDP ports.
217 You can see the types associated with a port by using the following
219 command:
220 semanage port -l
222 Policy governs the access confined processes have to these ports.
225 SELinux inetd_child policy is very flexible allowing users to setup
226 their inetd_child processes in as secure a method as possible.
227 The following port types are defined for inetd_child:
229 inetd_child_port_t
232 Default Defined Ports:
236 tcp 1,9,13,19,512,544,891,892,5666
237 udp 1,9,13,19,891,892
238
240 The SELinux process type inetd_child_t can manage files labeled with
241 the following file types. The paths listed are the default paths for
242 these file types. Note the processes UID still need to have DAC per‐
243 missions.
244 file_type
246 all files on the system
248
251 SELinux requires files to have an extended attribute to define the file
252 type.
253 You can see the context of a file using the -Z option to ls
255 Policy governs the access confined processes have to these files.
257 SELinux inetd_child policy is very flexible allowing users to setup
258 their inetd_child processes in as secure a method as possible.
259 STANDARD FILE CONTEXT
261 SELinux defines the file context types for the inetd_child, if you
263 wanted to store files with these types in a diffent paths, you need to
264 execute the semanage command to sepecify alternate labeling and then
265 use restorecon to put the labels on disk.
266 semanage fcontext -a -t inetd_child_var_run_t '/srv/myinetd_child_con‐
268 tent(/.*)?'
269 restorecon -R -v /srv/myinetd_child_content
270 Note: SELinux often uses regular expressions to specify labels that
272 match multiple files.
273 The following file types are defined for inetd_child:
275 inetd_child_exec_t
279 - Set files with the inetd_child_exec_t type, if you want to transition
281 an executable to the inetd_child_t domain.
282 Paths:
285 /usr/sbin/in..*d, /usr/lib/pysieved/pysieved.*.py,
286 /usr/local/lib/pysieved/pysieved.*.py, /usr/sbin/identd
287 inetd_child_tmp_t
290 - Set files with the inetd_child_tmp_t type, if you want to store inetd
292 child temporary files in the /tmp directories.
293 inetd_child_var_run_t
297 - Set files with the inetd_child_var_run_t type, if you want to store
299 the inetd child files under the /run or /var/run directory.
300 Note: File context can be temporarily modified with the chcon command.
304 If you want to permanently change the file context you need to use the
305 semanage fcontext command. This will modify the SELinux labeling data‐
306 base. You will need to use restorecon to apply the labels.
307
310 semanage fcontext can also be used to manipulate default file context
311 mappings.
312 semanage permissive can also be used to manipulate whether or not a
314 process type is permissive.
315 semanage module can also be used to enable/disable/install/remove pol‐
317 icy modules.
318 semanage port can also be used to manipulate the port definitions
320 semanage boolean can also be used to manipulate the booleans
322 system-config-selinux is a GUI tool available to customize SELinux pol‐
325 icy settings.
326
329 This manual page was auto-generated using sepolicy manpage .
330
333 selinux(8), inetd_child(8), semanage(8), restorecon(8), chcon(1),
334 sepolicy(8) , setsebool(8)
335inetd_child 19-04-25 inetd_child_selinux(8)