1postfix_pipe_selinux(8) SELinux Policy postfix_pipe postfix_pipe_selinux(8)
2
3
4
6 postfix_pipe_selinux - Security Enhanced Linux Policy for the post‐
7 fix_pipe processes
8
10 Security-Enhanced Linux secures the postfix_pipe processes via flexible
11 mandatory access control.
12
13 The postfix_pipe processes execute with the postfix_pipe_t SELinux
14 type. You can check if you have these processes running by executing
15 the ps command with the -Z qualifier.
16
17 For example:
18
19 ps -eZ | grep postfix_pipe_t
20
21
22
24 The postfix_pipe_t SELinux type can be entered via the post‐
25 fix_pipe_exec_t file type.
26
27 The default entrypoint paths for the postfix_pipe_t domain are the fol‐
28 lowing:
29
30 /usr/libexec/postfix/pipe
31
33 SELinux defines process types (domains) for each process running on the
34 system
35
36 You can see the context of a process using the -Z option to ps
37
38 Policy governs the access confined processes have to files. SELinux
39 postfix_pipe policy is very flexible allowing users to setup their
40 postfix_pipe processes in as secure a method as possible.
41
42 The following process types are defined for postfix_pipe:
43
44 postfix_pipe_t
45
46 Note: semanage permissive -a postfix_pipe_t can be used to make the
47 process type postfix_pipe_t permissive. SELinux does not deny access to
48 permissive process types, but the AVC (SELinux denials) messages are
49 still generated.
50
51
53 SELinux policy is customizable based on least access required. post‐
54 fix_pipe policy is extremely flexible and has several booleans that
55 allow you to manipulate the policy and run postfix_pipe with the tight‐
56 est access possible.
57
58
59
60 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
64 setsebool -P authlogin_nsswitch_use_ldap 1
65
66
67
68 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
71 setsebool -P fips_mode 1
72
73
74
75 If you want to allow confined applications to run with kerberos, you
76 must turn on the kerberos_enabled boolean. Enabled by default.
77
78 setsebool -P kerberos_enabled 1
79
80
81
82 If you want to allow system to run with NIS, you must turn on the
83 nis_enabled boolean. Disabled by default.
84
85 setsebool -P nis_enabled 1
86
87
88
89 If you want to allow confined applications to use nscd shared memory,
90 you must turn on the nscd_use_shm boolean. Disabled by default.
91
92 setsebool -P nscd_use_shm 1
93
94
95
97 The SELinux process type postfix_pipe_t can manage files labeled with
98 the following file types. The paths listed are the default paths for
99 these file types. Note the processes UID still need to have DAC per‐
100 missions.
101
102 anon_inodefs_t
103
104
105 mail_spool_t
106
107 /var/mail(/.*)?
108 /var/spool/imap(/.*)?
109 /var/spool/mail(/.*)?
110 /var/spool/smtpd(/.*)?
111
112 postfix_pipe_tmp_t
113
114
115 postfix_spool_t
116
117 /var/spool/postfix.*
118 /var/spool/postfix/defer(/.*)?
119 /var/spool/postfix/flush(/.*)?
120 /var/spool/postfix/deferred(/.*)?
121 /var/spool/postfix/maildrop(/.*)?
122
123 postfix_var_run_t
124
125 /var/spool/postfix/pid/.*
126
127
129 SELinux requires files to have an extended attribute to define the file
130 type.
131
132 You can see the context of a file using the -Z option to ls
133
134 Policy governs the access confined processes have to these files.
135 SELinux postfix_pipe policy is very flexible allowing users to setup
136 their postfix_pipe processes in as secure a method as possible.
137
138 STANDARD FILE CONTEXT
139
140 SELinux defines the file context types for the postfix_pipe, if you
141 wanted to store files with these types in a diffent paths, you need to
142 execute the semanage command to sepecify alternate labeling and then
143 use restorecon to put the labels on disk.
144
145 semanage fcontext -a -t postfix_pipe_tmp_t '/srv/mypostfix_pipe_con‐
146 tent(/.*)?'
147 restorecon -R -v /srv/mypostfix_pipe_content
148
149 Note: SELinux often uses regular expressions to specify labels that
150 match multiple files.
151
152 The following file types are defined for postfix_pipe:
153
154
155
156 postfix_pipe_exec_t
157
158 - Set files with the postfix_pipe_exec_t type, if you want to transi‐
159 tion an executable to the postfix_pipe_t domain.
160
161
162
163 postfix_pipe_tmp_t
164
165 - Set files with the postfix_pipe_tmp_t type, if you want to store
166 postfix pipe temporary files in the /tmp directories.
167
168
169
170 Note: File context can be temporarily modified with the chcon command.
171 If you want to permanently change the file context you need to use the
172 semanage fcontext command. This will modify the SELinux labeling data‐
173 base. You will need to use restorecon to apply the labels.
174
175
177 semanage fcontext can also be used to manipulate default file context
178 mappings.
179
180 semanage permissive can also be used to manipulate whether or not a
181 process type is permissive.
182
183 semanage module can also be used to enable/disable/install/remove pol‐
184 icy modules.
185
186 semanage boolean can also be used to manipulate the booleans
187
188
189 system-config-selinux is a GUI tool available to customize SELinux pol‐
190 icy settings.
191
192
194 This manual page was auto-generated using sepolicy manpage .
195
196
198 selinux(8), postfix_pipe(8), semanage(8), restorecon(8), chcon(1),
199 sepolicy(8), setsebool(8)
200
201
202
203postfix_pipe 19-05-30 postfix_pipe_selinux(8)