1postgrey_selinux(8) SELinux Policy postgrey postgrey_selinux(8)
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6 postgrey_selinux - Security Enhanced Linux Policy for the postgrey pro‐
7 cesses
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10 Security-Enhanced Linux secures the postgrey processes via flexible
11 mandatory access control.
12 The postgrey processes execute with the postgrey_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 postgrey_t
20
24 The postgrey_t SELinux type can be entered via the postgrey_exec_t file
25 type.
26 The default entrypoint paths for the postgrey_t domain are the follow‐
28 ing:
29 /usr/sbin/postgrey
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 postgrey policy is very flexible allowing users to setup their postgrey
40 processes in as secure a method as possible.
41 The following process types are defined for postgrey:
43 postgrey_t
45 Note: semanage permissive -a postgrey_t can be used to make the process
47 type postgrey_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. post‐
54 grey policy is extremely flexible and has several booleans that allow
55 you to manipulate the policy and run postgrey with the tightest access
56 possible.
57 If you want to allow users to resolve user passwd entries directly from
61 ldap rather then using a sssd server, you must turn on the authlo‐
62 gin_nsswitch_use_ldap boolean. Disabled by default.
63 setsebool -P authlogin_nsswitch_use_ldap 1
65 If you want to allow all daemons to write corefiles to /, you must turn
69 on the daemons_dump_core boolean. Disabled by default.
70 setsebool -P daemons_dump_core 1
72 If you want to enable cluster mode for daemons, you must turn on the
76 daemons_enable_cluster_mode boolean. Enabled by default.
77 setsebool -P daemons_enable_cluster_mode 1
79 If you want to allow all daemons to use tcp wrappers, you must turn on
83 the daemons_use_tcp_wrapper boolean. Disabled by default.
84 setsebool -P daemons_use_tcp_wrapper 1
86 If you want to allow all daemons the ability to read/write terminals,
90 you must turn on the daemons_use_tty boolean. Disabled by default.
91 setsebool -P daemons_use_tty 1
93 If you want to deny any process from ptracing or debugging any other
97 processes, you must turn on the deny_ptrace boolean. Enabled by
98 default.
99 setsebool -P deny_ptrace 1
101 If you want to allow any process to mmap any file on system with
105 attribute file_type, you must turn on the domain_can_mmap_files bool‐
106 ean. Enabled by default.
107 setsebool -P domain_can_mmap_files 1
109 If you want to allow all domains write to kmsg_device, while kernel is
113 executed with systemd.log_target=kmsg parameter, you must turn on the
114 domain_can_write_kmsg boolean. Disabled by default.
115 setsebool -P domain_can_write_kmsg 1
117 If you want to allow all domains to use other domains file descriptors,
121 you must turn on the domain_fd_use boolean. Enabled by default.
122 setsebool -P domain_fd_use 1
124 If you want to allow all domains to have the kernel load modules, you
128 must turn on the domain_kernel_load_modules boolean. Disabled by
129 default.
130 setsebool -P domain_kernel_load_modules 1
132 If you want to allow all domains to execute in fips_mode, you must turn
136 on the fips_mode boolean. Enabled by default.
137 setsebool -P fips_mode 1
139 If you want to enable reading of urandom for all domains, you must turn
143 on the global_ssp boolean. Disabled by default.
144 setsebool -P global_ssp 1
146 If you want to allow confined applications to run with kerberos, you
150 must turn on the kerberos_enabled boolean. Enabled by default.
151 setsebool -P kerberos_enabled 1
153 If you want to allow system to run with NIS, you must turn on the
157 nis_enabled boolean. Disabled by default.
158 setsebool -P nis_enabled 1
160 If you want to allow confined applications to use nscd shared memory,
164 you must turn on the nscd_use_shm boolean. Disabled by default.
165 setsebool -P nscd_use_shm 1
167
171 SELinux defines port types to represent TCP and UDP ports.
172 You can see the types associated with a port by using the following
174 command:
175 semanage port -l
177 Policy governs the access confined processes have to these ports.
180 SELinux postgrey policy is very flexible allowing users to setup their
181 postgrey processes in as secure a method as possible.
182 The following port types are defined for postgrey:
184 postgrey_port_t
187 Default Defined Ports:
191 tcp 60000
192
194 The SELinux process type postgrey_t can manage files labeled with the
195 following file types. The paths listed are the default paths for these
196 file types. Note the processes UID still need to have DAC permissions.
197 cluster_conf_t
199 /etc/cluster(/.*)?
201 cluster_var_lib_t
203 /var/lib/pcsd(/.*)?
205 /var/lib/cluster(/.*)?
206 /var/lib/openais(/.*)?
207 /var/lib/pengine(/.*)?
208 /var/lib/corosync(/.*)?
209 /usr/lib/heartbeat(/.*)?
210 /var/lib/heartbeat(/.*)?
211 /var/lib/pacemaker(/.*)?
212 cluster_var_run_t
214 /var/run/crm(/.*)?
216 /var/run/cman_.*
217 /var/run/rsctmp(/.*)?
218 /var/run/aisexec.*
219 /var/run/heartbeat(/.*)?
220 /var/run/corosync-qnetd(/.*)?
221 /var/run/corosync-qdevice(/.*)?
222 /var/run/cpglockd.pid
223 /var/run/corosync.pid
224 /var/run/rgmanager.pid
225 /var/run/cluster/rgmanager.sk
226 postfix_spool_type
228 postgrey_spool_t
231 /var/spool/postfix/postgrey(/.*)?
233 postgrey_var_lib_t
235 /var/lib/postgrey(/.*)?
237 postgrey_var_run_t
239 /var/run/postgrey(/.*)?
241 /var/run/postgrey.pid
242 root_t
244 /sysroot/ostree/deploy/.*-atomic.*/deploy(/.*)?
246 /
247 /initrd
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 postgrey policy is very flexible allowing users to setup their
258 postgrey processes in as secure a method as possible.
259 EQUIVALENCE DIRECTORIES
261 postgrey policy stores data with multiple different file context types
264 under the /var/run/postgrey directory. If you would like to store the
265 data in a different directory you can use the semanage command to cre‐
266 ate an equivalence mapping. If you wanted to store this data under the
267 /srv dirctory you would execute the following command:
268 semanage fcontext -a -e /var/run/postgrey /srv/postgrey
270 restorecon -R -v /srv/postgrey
271 STANDARD FILE CONTEXT
273 SELinux defines the file context types for the postgrey, if you wanted
275 to store files with these types in a diffent paths, you need to execute
276 the semanage command to sepecify alternate labeling and then use
277 restorecon to put the labels on disk.
278 semanage fcontext -a -t postgrey_var_run_t '/srv/mypostgrey_con‐
280 tent(/.*)?'
281 restorecon -R -v /srv/mypostgrey_content
282 Note: SELinux often uses regular expressions to specify labels that
284 match multiple files.
285 The following file types are defined for postgrey:
287 postgrey_etc_t
291 - Set files with the postgrey_etc_t type, if you want to store postgrey
293 files in the /etc directories.
294 postgrey_exec_t
298 - Set files with the postgrey_exec_t type, if you want to transition an
300 executable to the postgrey_t domain.
301 postgrey_initrc_exec_t
305 - Set files with the postgrey_initrc_exec_t type, if you want to tran‐
307 sition an executable to the postgrey_initrc_t domain.
308 postgrey_spool_t
312 - Set files with the postgrey_spool_t type, if you want to store the
314 postgrey files under the /var/spool directory.
315 postgrey_var_lib_t
319 - Set files with the postgrey_var_lib_t type, if you want to store the
321 postgrey files under the /var/lib directory.
322 postgrey_var_run_t
326 - Set files with the postgrey_var_run_t type, if you want to store the
328 postgrey files under the /run or /var/run directory.
329 Paths:
332 /var/run/postgrey(/.*)?, /var/run/postgrey.pid
333 Note: File context can be temporarily modified with the chcon command.
336 If you want to permanently change the file context you need to use the
337 semanage fcontext command. This will modify the SELinux labeling data‐
338 base. You will need to use restorecon to apply the labels.
339
342 semanage fcontext can also be used to manipulate default file context
343 mappings.
344 semanage permissive can also be used to manipulate whether or not a
346 process type is permissive.
347 semanage module can also be used to enable/disable/install/remove pol‐
349 icy modules.
350 semanage port can also be used to manipulate the port definitions
352 semanage boolean can also be used to manipulate the booleans
354 system-config-selinux is a GUI tool available to customize SELinux pol‐
357 icy settings.
358
361 This manual page was auto-generated using sepolicy manpage .
362
365 selinux(8), postgrey(8), semanage(8), restorecon(8), chcon(1), sepol‐
366 icy(8) , setsebool(8)
367postgrey 19-04-25 postgrey_selinux(8)