1postfix_master_selinux(8)SELinux Policy postfix_masterpostfix_master_selinux(8)
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6 postfix_master_selinux - Security Enhanced Linux Policy for the post‐
7 fix_master processes
8
10 Security-Enhanced Linux secures the postfix_master processes via flexi‐
11 ble mandatory access control.
12 The postfix_master processes execute with the postfix_master_t SELinux
14 type. You can check if you have these processes running by executing
15 the ps command with the -Z qualifier.
16 For example:
18 ps -eZ | grep postfix_master_t
20
24 The postfix_master_t SELinux type can be entered via the postfix_mas‐
25 ter_exec_t file type.
26 The default entrypoint paths for the postfix_master_t domain are the
28 following:
29 /usr/sbin/postcat, /usr/sbin/postfix, /usr/sbin/postlog,
31 /usr/sbin/postkick, /usr/sbin/postlock, /usr/sbin/postalias,
32 /usr/sbin/postsuper, /usr/libexec/postfix/master
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 postfix_master policy is very flexible allowing users to setup their
42 postfix_master processes in as secure a method as possible.
43 The following process types are defined for postfix_master:
45 postfix_master_t
47 Note: semanage permissive -a postfix_master_t can be used to make the
49 process type postfix_master_t permissive. SELinux does not deny access
50 to permissive process types, but the AVC (SELinux denials) messages are
51 still generated.
52
55 SELinux policy is customizable based on least access required. post‐
56 fix_master policy is extremely flexible and has several booleans that
57 allow you to manipulate the policy and run postfix_master with the
58 tightest access possible.
59 If you want to allow users to resolve user passwd entries directly from
63 ldap rather then using a sssd server, you must turn on the authlo‐
64 gin_nsswitch_use_ldap boolean. Disabled by default.
65 setsebool -P authlogin_nsswitch_use_ldap 1
67 If you want to allow all domains to execute in fips_mode, you must turn
71 on the fips_mode boolean. Enabled by default.
72 setsebool -P fips_mode 1
74 If you want to allow confined applications to run with kerberos, you
78 must turn on the kerberos_enabled boolean. Enabled by default.
79 setsebool -P kerberos_enabled 1
81 If you want to allow system to run with NIS, you must turn on the
85 nis_enabled boolean. Disabled by default.
86 setsebool -P nis_enabled 1
88 If you want to allow confined applications to use nscd shared memory,
92 you must turn on the nscd_use_shm boolean. Disabled by default.
93 setsebool -P nscd_use_shm 1
95
99 The SELinux process type postfix_master_t can manage files labeled with
100 the following file types. The paths listed are the default paths for
101 these file types. Note the processes UID still need to have DAC per‐
102 missions.
103 anon_inodefs_t
105 cluster_conf_t
108 /etc/cluster(/.*)?
110 cluster_var_lib_t
112 /var/lib/pcsd(/.*)?
114 /var/lib/cluster(/.*)?
115 /var/lib/openais(/.*)?
116 /var/lib/pengine(/.*)?
117 /var/lib/corosync(/.*)?
118 /usr/lib/heartbeat(/.*)?
119 /var/lib/heartbeat(/.*)?
120 /var/lib/pacemaker(/.*)?
121 cluster_var_run_t
123 /var/run/crm(/.*)?
125 /var/run/cman_.*
126 /var/run/rsctmp(/.*)?
127 /var/run/aisexec.*
128 /var/run/heartbeat(/.*)?
129 /var/run/corosync-qnetd(/.*)?
130 /var/run/corosync-qdevice(/.*)?
131 /var/run/corosync.pid
132 /var/run/cpglockd.pid
133 /var/run/rgmanager.pid
134 /var/run/cluster/rgmanager.sk
135 etc_aliases_t
137 /etc/mail/.*.db
139 /etc/mail/aliases.*
140 /etc/postfix/aliases.*
141 /etc/aliases
142 /etc/aliases.db
143 mailman_data_t
145 /etc/mailman.*
147 /var/lib/mailman(/.*)?
148 /var/spool/mailman.*
149 postfix_data_t
151 /var/lib/postfix.*
153 postfix_etc_t
155 /etc/postfix.*
157 postfix_private_t
159 /var/spool/postfix/private(/.*)?
161 postfix_prng_t
163 /etc/postfix/prng_exch
165 postfix_spool_t
167 /var/spool/postfix.*
169 /var/spool/postfix/defer(/.*)?
170 /var/spool/postfix/flush(/.*)?
171 /var/spool/postfix/deferred(/.*)?
172 /var/spool/postfix/maildrop(/.*)?
173 postfix_var_run_t
175 /var/spool/postfix/pid/.*
177 root_t
179 /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
181 /
182 /initrd
183
186 SELinux requires files to have an extended attribute to define the file
187 type.
188 You can see the context of a file using the -Z option to ls
190 Policy governs the access confined processes have to these files.
192 SELinux postfix_master policy is very flexible allowing users to setup
193 their postfix_master processes in as secure a method as possible.
194 The following file types are defined for postfix_master:
196 postfix_master_exec_t
200 - Set files with the postfix_master_exec_t type, if you want to transi‐
202 tion an executable to the postfix_master_t domain.
203 Paths:
206 /usr/sbin/postcat, /usr/sbin/postfix, /usr/sbin/postlog,
207 /usr/sbin/postkick, /usr/sbin/postlock, /usr/sbin/postalias,
208 /usr/sbin/postsuper, /usr/libexec/postfix/master
209 Note: File context can be temporarily modified with the chcon command.
212 If you want to permanently change the file context you need to use the
213 semanage fcontext command. This will modify the SELinux labeling data‐
214 base. You will need to use restorecon to apply the labels.
215
218 semanage fcontext can also be used to manipulate default file context
219 mappings.
220 semanage permissive can also be used to manipulate whether or not a
222 process type is permissive.
223 semanage module can also be used to enable/disable/install/remove pol‐
225 icy modules.
226 semanage boolean can also be used to manipulate the booleans
228 system-config-selinux is a GUI tool available to customize SELinux pol‐
231 icy settings.
232
235 This manual page was auto-generated using sepolicy manpage .
236
239 selinux(8), postfix_master(8), semanage(8), restorecon(8), chcon(1),
240 sepolicy(8), setsebool(8)
241postfix_master 19-06-18 postfix_master_selinux(8)