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
8
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 domains to execute in fips_mode, you must turn
69 on the fips_mode boolean. Enabled by default.
70 setsebool -P fips_mode 1
72 If you want to allow confined applications to run with kerberos, you
76 must turn on the kerberos_enabled boolean. Enabled by default.
77 setsebool -P kerberos_enabled 1
79 If you want to allow system to run with NIS, you must turn on the
83 nis_enabled boolean. Disabled by default.
84 setsebool -P nis_enabled 1
86 If you want to allow confined applications to use nscd shared memory,
90 you must turn on the nscd_use_shm boolean. Enabled by default.
91 setsebool -P nscd_use_shm 1
93
97 SELinux defines port types to represent TCP and UDP ports.
98 You can see the types associated with a port by using the following
100 command:
101 semanage port -l
103 Policy governs the access confined processes have to these ports.
106 SELinux postgrey policy is very flexible allowing users to setup their
107 postgrey processes in as secure a method as possible.
108 The following port types are defined for postgrey:
110 postgrey_port_t
113 Default Defined Ports:
117 tcp 60000
118
120 The SELinux process type postgrey_t can manage files labeled with the
121 following file types. The paths listed are the default paths for these
122 file types. Note the processes UID still need to have DAC permissions.
123 cluster_conf_t
125 /etc/cluster(/.*)?
127 cluster_var_lib_t
129 /var/lib/pcsd(/.*)?
131 /var/lib/cluster(/.*)?
132 /var/lib/openais(/.*)?
133 /var/lib/pengine(/.*)?
134 /var/lib/corosync(/.*)?
135 /usr/lib/heartbeat(/.*)?
136 /var/lib/heartbeat(/.*)?
137 /var/lib/pacemaker(/.*)?
138 cluster_var_run_t
140 /var/run/crm(/.*)?
142 /var/run/cman_.*
143 /var/run/rsctmp(/.*)?
144 /var/run/aisexec.*
145 /var/run/heartbeat(/.*)?
146 /var/run/corosync-qnetd(/.*)?
147 /var/run/corosync-qdevice(/.*)?
148 /var/run/corosync.pid
149 /var/run/cpglockd.pid
150 /var/run/rgmanager.pid
151 /var/run/cluster/rgmanager.sk
152 postfix_spool_type
154 postgrey_spool_t
157 /var/spool/postfix/postgrey(/.*)?
159 postgrey_var_lib_t
161 /var/lib/postgrey(/.*)?
163 postgrey_var_run_t
165 /var/run/postgrey(/.*)?
167 /var/run/postgrey.pid
168 root_t
170 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
172 /
173 /initrd
174
177 SELinux requires files to have an extended attribute to define the file
178 type.
179 You can see the context of a file using the -Z option to ls
181 Policy governs the access confined processes have to these files.
183 SELinux postgrey policy is very flexible allowing users to setup their
184 postgrey processes in as secure a method as possible.
185 EQUIVALENCE DIRECTORIES
187 postgrey policy stores data with multiple different file context types
190 under the /var/run/postgrey directory. If you would like to store the
191 data in a different directory you can use the semanage command to cre‐
192 ate an equivalence mapping. If you wanted to store this data under the
193 /srv dirctory you would execute the following command:
194 semanage fcontext -a -e /var/run/postgrey /srv/postgrey
196 restorecon -R -v /srv/postgrey
197 STANDARD FILE CONTEXT
199 SELinux defines the file context types for the postgrey, if you wanted
201 to store files with these types in a diffent paths, you need to execute
202 the semanage command to sepecify alternate labeling and then use
203 restorecon to put the labels on disk.
204 semanage fcontext -a -t postgrey_var_run_t '/srv/mypostgrey_con‐
206 tent(/.*)?'
207 restorecon -R -v /srv/mypostgrey_content
208 Note: SELinux often uses regular expressions to specify labels that
210 match multiple files.
211 The following file types are defined for postgrey:
213 postgrey_etc_t
217 - Set files with the postgrey_etc_t type, if you want to store postgrey
219 files in the /etc directories.
220 postgrey_exec_t
224 - Set files with the postgrey_exec_t type, if you want to transition an
226 executable to the postgrey_t domain.
227 postgrey_initrc_exec_t
231 - Set files with the postgrey_initrc_exec_t type, if you want to tran‐
233 sition an executable to the postgrey_initrc_t domain.
234 postgrey_spool_t
238 - Set files with the postgrey_spool_t type, if you want to store the
240 postgrey files under the /var/spool directory.
241 postgrey_var_lib_t
245 - Set files with the postgrey_var_lib_t type, if you want to store the
247 postgrey files under the /var/lib directory.
248 postgrey_var_run_t
252 - Set files with the postgrey_var_run_t type, if you want to store the
254 postgrey files under the /run or /var/run directory.
255 Paths:
258 /var/run/postgrey(/.*)?, /var/run/postgrey.pid
259 Note: File context can be temporarily modified with the chcon command.
262 If you want to permanently change the file context you need to use the
263 semanage fcontext command. This will modify the SELinux labeling data‐
264 base. You will need to use restorecon to apply the labels.
265
268 semanage fcontext can also be used to manipulate default file context
269 mappings.
270 semanage permissive can also be used to manipulate whether or not a
272 process type is permissive.
273 semanage module can also be used to enable/disable/install/remove pol‐
275 icy modules.
276 semanage port can also be used to manipulate the port definitions
278 semanage boolean can also be used to manipulate the booleans
280 system-config-selinux is a GUI tool available to customize SELinux pol‐
283 icy settings.
284
287 This manual page was auto-generated using sepolicy manpage .
288
291 selinux(8), postgrey(8), semanage(8), restorecon(8), chcon(1), sepol‐
292 icy(8), setsebool(8)
293postgrey 19-10-08 postgrey_selinux(8)