1inetd_child_selinux(8) SELinux Policy inetd_child inetd_child_selinux(8)
2
6 inetd_child_selinux - Security Enhanced Linux Policy for the in‐
7 etd_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 usr_t, in‐
25 etd_child_exec_t, bin_t file types.
26 The default entrypoint paths for the inetd_child_t domain are the fol‐
28 lowing:
29 All executables with the default executable label, usually stored in
31 /usr/bin and /usr/sbin. /opt/.*, /usr/.*, /emul/.*, /export(/.*)?,
32 /ostree(/.*)?, /usr/doc(/.*)?/lib(/.*)?, /usr/inclu.e(/.*)?,
33 /usr/share/rpm(/.*)?, /usr/share/doc(/.*)?/README.*, /usr/lib/mod‐
34 ules(/.*)/vmlinuz, /usr/lib/modules(/.*)/initramfs.img, /usr/lib/sysim‐
35 age(/.*)?, /usr/lib/ostree-boot(/.*)?, /opt, /usr, /emul,
36 /usr/sbin/in..*d, /usr/lib/pysieved/pysieved.*.py, /usr/lo‐
37 cal/lib/pysieved/pysieved.*.py, /usr/sbin/identd
38
40 SELinux defines process types (domains) for each process running on the
41 system
42 You can see the context of a process using the -Z option to ps
44 Policy governs the access confined processes have to files. SELinux
46 inetd_child policy is very flexible allowing users to setup their in‐
47 etd_child processes in as secure a method as possible.
48 The following process types are defined for inetd_child:
50 inetd_child_t
52 Note: semanage permissive -a inetd_child_t can be used to make the
54 process type inetd_child_t permissive. SELinux does not deny access to
55 permissive process types, but the AVC (SELinux denials) messages are
56 still generated.
57
60 SELinux policy is customizable based on least access required. in‐
61 etd_child policy is extremely flexible and has several booleans that
62 allow you to manipulate the policy and run inetd_child with the tight‐
63 est access possible.
64 If you want to dontaudit all daemons scheduling requests (setsched,
68 sys_nice), you must turn on the daemons_dontaudit_scheduling boolean.
69 Enabled by default.
70 setsebool -P daemons_dontaudit_scheduling 1
72 If you want to deny user domains applications to map a memory region as
76 both executable and writable, this is dangerous and the executable
77 should be reported in bugzilla, you must turn on the deny_execmem bool‐
78 ean. Disabled by default.
79 setsebool -P deny_execmem 1
81 If you want to control the ability to mmap a low area of the address
85 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
86 the mmap_low_allowed boolean. Disabled by default.
87 setsebool -P mmap_low_allowed 1
89 If you want to allow system to run with NIS, you must turn on the
93 nis_enabled boolean. Disabled by default.
94 setsebool -P nis_enabled 1
96 If you want to disable kernel module loading, you must turn on the se‐
100 cure_mode_insmod boolean. Disabled by default.
101 setsebool -P secure_mode_insmod 1
103 If you want to allow unconfined executables to make their heap memory
107 executable. Doing this is a really bad idea. Probably indicates a
108 badly coded executable, but could indicate an attack. This executable
109 should be reported in bugzilla, you must turn on the selinuxuser_ex‐
110 echeap boolean. Disabled by default.
111 setsebool -P selinuxuser_execheap 1
113 If you want to allow unconfined executables to make their stack exe‐
117 cutable. This should never, ever be necessary. Probably indicates a
118 badly coded executable, but could indicate an attack. This executable
119 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
120 stack boolean. Enabled by default.
121 setsebool -P selinuxuser_execstack 1
123
127 SELinux defines port types to represent TCP and UDP ports.
128 You can see the types associated with a port by using the following
130 command:
131 semanage port -l
133 Policy governs the access confined processes have to these ports.
136 SELinux inetd_child policy is very flexible allowing users to setup
137 their inetd_child processes in as secure a method as possible.
138 The following port types are defined for inetd_child:
140 inetd_child_port_t
143 Default Defined Ports:
147 tcp 1,9,13,19,512,544,891,892,5666
148 udp 1,9,13,19,891,892
149
151 The SELinux process type inetd_child_t can manage files labeled with
152 the following file types. The paths listed are the default paths for
153 these file types. Note the processes UID still need to have DAC per‐
154 missions.
155 file_type
157 all files on the system
159
162 SELinux requires files to have an extended attribute to define the file
163 type.
164 You can see the context of a file using the -Z option to ls
166 Policy governs the access confined processes have to these files.
168 SELinux inetd_child policy is very flexible allowing users to setup
169 their inetd_child processes in as secure a method as possible.
170 STANDARD FILE CONTEXT
172 SELinux defines the file context types for the inetd_child, if you
174 wanted to store files with these types in a different paths, you need
175 to execute the semanage command to specify alternate labeling and then
176 use restorecon to put the labels on disk.
177 semanage fcontext -a -t inetd_child_exec_t '/srv/inetd_child/con‐
179 tent(/.*)?'
180 restorecon -R -v /srv/myinetd_child_content
181 Note: SELinux often uses regular expressions to specify labels that
183 match multiple files.
184 The following file types are defined for inetd_child:
186 inetd_child_exec_t
190 - Set files with the inetd_child_exec_t type, if you want to transition
192 an executable to the inetd_child_t domain.
193 Paths:
196 /usr/sbin/in..*d, /usr/lib/pysieved/pysieved.*.py, /usr/lo‐
197 cal/lib/pysieved/pysieved.*.py, /usr/sbin/identd
198 inetd_child_tmp_t
201 - Set files with the inetd_child_tmp_t type, if you want to store inetd
203 child temporary files in the /tmp directories.
204 inetd_child_var_run_t
208 - Set files with the inetd_child_var_run_t type, if you want to store
210 the inetd child files under the /run or /var/run directory.
211 Note: File context can be temporarily modified with the chcon command.
215 If you want to permanently change the file context you need to use the
216 semanage fcontext command. This will modify the SELinux labeling data‐
217 base. You will need to use restorecon to apply the labels.
218
221 semanage fcontext can also be used to manipulate default file context
222 mappings.
223 semanage permissive can also be used to manipulate whether or not a
225 process type is permissive.
226 semanage module can also be used to enable/disable/install/remove pol‐
228 icy modules.
229 semanage port can also be used to manipulate the port definitions
231 semanage boolean can also be used to manipulate the booleans
233 system-config-selinux is a GUI tool available to customize SELinux pol‐
236 icy settings.
237
240 This manual page was auto-generated using sepolicy manpage .
241
244 selinux(8), inetd_child(8), semanage(8), restorecon(8), chcon(1), se‐
245 policy(8), setsebool(8)
246inetd_child 23-10-20 inetd_child_selinux(8)