1semanage_selinux(8) SELinux Policy semanage semanage_selinux(8)
2
6 semanage_selinux - Security Enhanced Linux Policy for the semanage pro‐
7 cesses
8
10 Security-Enhanced Linux secures the semanage processes via flexible
11 mandatory access control.
12 The semanage processes execute with the semanage_t SELinux type. You
14 can check if you have these processes running by executing the ps com‐
15 mand with the -Z qualifier.
16 For example:
18 ps -eZ | grep semanage_t
20
24 The semanage_t SELinux type can be entered via the semanage_exec_t file
25 type.
26 The default entrypoint paths for the semanage_t domain are the follow‐
28 ing:
29 /usr/sbin/semanage, /usr/sbin/semodule, /usr/libexec/selinux/seman‐
31 age_migrate_store, /usr/share/system-config-selinux/selinux_server.py,
32 /usr/share/system-config-selinux/system-config-selinux-dbus.py
33
35 SELinux defines process types (domains) for each process running on the
36 system
37 You can see the context of a process using the -Z option to ps
39 Policy governs the access confined processes have to files. SELinux
41 semanage policy is very flexible allowing users to setup their semanage
42 processes in as secure a method as possible.
43 The following process types are defined for semanage:
45 semanage_t
47 Note: semanage permissive -a semanage_t can be used to make the process
49 type semanage_t permissive. SELinux does not deny access to permissive
50 process types, but the AVC (SELinux denials) messages are still gener‐
51 ated.
52
55 SELinux policy is customizable based on least access required. seman‐
56 age policy is extremely flexible and has several booleans that allow
57 you to manipulate the policy and run semanage with the tightest access
58 possible.
59 If you want to dontaudit all daemons scheduling requests (setsched,
63 sys_nice), you must turn on the daemons_dontaudit_scheduling boolean.
64 Enabled by default.
65 setsebool -P daemons_dontaudit_scheduling 1
67 If you want to deny user domains applications to map a memory region as
71 both executable and writable, this is dangerous and the executable
72 should be reported in bugzilla, you must turn on the deny_execmem bool‐
73 ean. Disabled by default.
74 setsebool -P deny_execmem 1
76 If you want to control the ability to mmap a low area of the address
80 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
81 the mmap_low_allowed boolean. Disabled by default.
82 setsebool -P mmap_low_allowed 1
84 If you want to allow system to run with NIS, you must turn on the
88 nis_enabled boolean. Disabled by default.
89 setsebool -P nis_enabled 1
91 If you want to disable kernel module loading, you must turn on the se‐
95 cure_mode_insmod boolean. Disabled by default.
96 setsebool -P secure_mode_insmod 1
98 If you want to allow unconfined executables to make their heap memory
102 executable. Doing this is a really bad idea. Probably indicates a
103 badly coded executable, but could indicate an attack. This executable
104 should be reported in bugzilla, you must turn on the selinuxuser_ex‐
105 echeap boolean. Disabled by default.
106 setsebool -P selinuxuser_execheap 1
108 If you want to allow unconfined executables to make their stack exe‐
112 cutable. This should never, ever be necessary. Probably indicates a
113 badly coded executable, but could indicate an attack. This executable
114 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
115 stack boolean. Enabled by default.
116 setsebool -P selinuxuser_execstack 1
118
122 The SELinux process type semanage_t can manage files labeled with the
123 following file types. The paths listed are the default paths for these
124 file types. Note the processes UID still need to have DAC permissions.
125 file_type
127 all files on the system
129
132 SELinux requires files to have an extended attribute to define the file
133 type.
134 You can see the context of a file using the -Z option to ls
136 Policy governs the access confined processes have to these files.
138 SELinux semanage policy is very flexible allowing users to setup their
139 semanage processes in as secure a method as possible.
140 EQUIVALENCE DIRECTORIES
142 semanage policy stores data with multiple different file context types
145 under the /var/lib/selinux directory. If you would like to store the
146 data in a different directory you can use the semanage command to cre‐
147 ate an equivalence mapping. If you wanted to store this data under the
148 /srv directory you would execute the following command:
149 semanage fcontext -a -e /var/lib/selinux /srv/selinux
151 restorecon -R -v /srv/selinux
152 STANDARD FILE CONTEXT
154 SELinux defines the file context types for the semanage, if you wanted
156 to store files with these types in a different paths, you need to exe‐
157 cute the semanage command to specify alternate labeling and then use
158 restorecon to put the labels on disk.
159 semanage fcontext -a -t semanage_store_t '/srv/semanage/content(/.*)?'
161 restorecon -R -v /srv/mysemanage_content
162 Note: SELinux often uses regular expressions to specify labels that
164 match multiple files.
165 The following file types are defined for semanage:
167 semanage_exec_t
171 - Set files with the semanage_exec_t type, if you want to transition an
173 executable to the semanage_t domain.
174 Paths:
177 /usr/sbin/semanage, /usr/sbin/semodule, /usr/libexec/selinux/sem‐
178 anage_migrate_store, /usr/share/system-config-
179 selinux/selinux_server.py, /usr/share/system-config-selinux/sys‐
180 tem-config-selinux-dbus.py
181 semanage_read_lock_t
184 - Set files with the semanage_read_lock_t type, if you want to treat
186 the files as semanage read lock data, stored under the /var/lock direc‐
187 tory
188 Paths:
191 /etc/selinux/([^/]*/)?modules/semanage.read.LOCK,
192 /var/lib/selinux/[^/]+/semanage.read.LOCK
193 semanage_store_t
196 - Set files with the semanage_store_t type, if you want to treat the
198 files as semanage store data.
199 Paths:
202 /etc/selinux/([^/]*/)?policy(/.*)?, /etc/selinux/(minimum|mls|tar‐
203 geted)/active(/.*)?, /etc/selinux/([^/]*/)?modules/(ac‐
204 tive|tmp|previous)(/.*)?, /var/lib/selinux(/.*)?,
205 /etc/share/selinux/mls(/.*)?, /etc/share/selinux/targeted(/.*)?
206 semanage_tmp_t
209 - Set files with the semanage_tmp_t type, if you want to store semanage
211 temporary files in the /tmp directories.
212 semanage_trans_lock_t
216 - Set files with the semanage_trans_lock_t type, if you want to treat
218 the files as semanage trans lock data, stored under the /var/lock di‐
219 rectory
220 Paths:
223 /etc/selinux/([^/]*/)?modules/semanage.trans.LOCK,
224 /var/lib/selinux/[^/]+/semanage.trans.LOCK
225 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.
231
234 semanage fcontext can also be used to manipulate default file context
235 mappings.
236 semanage permissive can also be used to manipulate whether or not a
238 process type is permissive.
239 semanage module can also be used to enable/disable/install/remove pol‐
241 icy modules.
242 semanage boolean can also be used to manipulate the booleans
244 system-config-selinux is a GUI tool available to customize SELinux pol‐
247 icy settings.
248
251 This manual page was auto-generated using sepolicy manpage .
252
255 selinux(8), semanage(8), semanage(8), restorecon(8), chcon(1), sepol‐
256 icy(8), setsebool(8)
257semanage 23-10-20 semanage_selinux(8)