1postfix_local_selinux(8) SELinux Policy postfix_local postfix_local_selinux(8)
2
6 postfix_local_selinux - Security Enhanced Linux Policy for the post‐
7 fix_local processes
8
10 Security-Enhanced Linux secures the postfix_local processes via flexi‐
11 ble mandatory access control.
12 The postfix_local processes execute with the postfix_local_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_local_t
20
24 The postfix_local_t SELinux type can be entered via the post‐
25 fix_local_exec_t file type.
26 The default entrypoint paths for the postfix_local_t domain are the
28 following:
29 /usr/libexec/postfix/local
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 postfix_local policy is very flexible allowing users to setup their
40 postfix_local processes in as secure a method as possible.
41 The following process types are defined for postfix_local:
43 postfix_local_t
45 Note: semanage permissive -a postfix_local_t can be used to make the
47 process type postfix_local_t permissive. SELinux does not deny access
48 to permissive process types, but the AVC (SELinux denials) messages are
49 still generated.
50
53 SELinux policy is customizable based on least access required. post‐
54 fix_local policy is extremely flexible and has several booleans that
55 allow you to manipulate the policy and run postfix_local with the
56 tightest access possible.
57 If you want to allow postfix_local domain full write access to
61 mail_spool directories, you must turn on the post‐
62 fix_local_write_mail_spool boolean. Enabled by default.
63 setsebool -P postfix_local_write_mail_spool 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 system to run with NIS, you must turn on the
76 nis_enabled boolean. Disabled by default.
77 setsebool -P nis_enabled 1
79 If you want to support NFS home directories, you must turn on the
83 use_nfs_home_dirs boolean. Enabled by default.
84 setsebool -P use_nfs_home_dirs 1
86 If you want to support SAMBA home directories, you must turn on the
90 use_samba_home_dirs boolean. Disabled by default.
91 setsebool -P use_samba_home_dirs 1
93
97 The SELinux process type postfix_local_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 anon_inodefs_t
103 cifs_t
106 dovecot_spool_t
109 /var/spool/dovecot(/.*)?
111 ecryptfs_t
113 /home/[^/]+/.Private(/.*)?
115 /home/[^/]+/.ecryptfs(/.*)?
116 fusefs_t
118 /var/run/user/[^/]*/gvfs
120 mail_home_rw_t
122 /root/Maildir(/.*)?
124 /root/.esmtp_queue(/.*)?
125 /var/lib/arpwatch/.esmtp_queue(/.*)?
126 /home/[^/]+/.maildir(/.*)?
127 /home/[^/]+/Maildir(/.*)?
128 /home/[^/]+/.esmtp_queue(/.*)?
129 mailman_data_t
131 /etc/mailman.*
133 /var/lib/mailman(/.*)?
134 /var/spool/mailman.*
135 nfs_t
137 postfix_spool_t
140 /var/spool/postfix.*
142 /var/spool/postfix/defer(/.*)?
143 /var/spool/postfix/flush(/.*)?
144 /var/spool/postfix/deferred(/.*)?
145 /var/spool/postfix/maildrop(/.*)?
146 postfix_var_run_t
148 /var/spool/postfix/pid/.*
150 user_home_t
152 /home/[^/]+/.+
154
157 SELinux requires files to have an extended attribute to define the file
158 type.
159 You can see the context of a file using the -Z option to ls
161 Policy governs the access confined processes have to these files.
163 SELinux postfix_local policy is very flexible allowing users to setup
164 their postfix_local processes in as secure a method as possible.
165 STANDARD FILE CONTEXT
167 SELinux defines the file context types for the postfix_local, if you
169 wanted to store files with these types in a diffent paths, you need to
170 execute the semanage command to sepecify alternate labeling and then
171 use restorecon to put the labels on disk.
172 semanage fcontext -a -t postfix_local_tmp_t '/srv/mypostfix_local_con‐
174 tent(/.*)?'
175 restorecon -R -v /srv/mypostfix_local_content
176 Note: SELinux often uses regular expressions to specify labels that
178 match multiple files.
179 The following file types are defined for postfix_local:
181 postfix_local_exec_t
185 - Set files with the postfix_local_exec_t type, if you want to transi‐
187 tion an executable to the postfix_local_t domain.
188 postfix_local_tmp_t
192 - Set files with the postfix_local_tmp_t type, if you want to store
194 postfix local temporary files in the /tmp directories.
195 Note: File context can be temporarily modified with the chcon command.
199 If you want to permanently change the file context you need to use the
200 semanage fcontext command. This will modify the SELinux labeling data‐
201 base. You will need to use restorecon to apply the labels.
202
205 semanage fcontext can also be used to manipulate default file context
206 mappings.
207 semanage permissive can also be used to manipulate whether or not a
209 process type is permissive.
210 semanage module can also be used to enable/disable/install/remove pol‐
212 icy modules.
213 semanage boolean can also be used to manipulate the booleans
215 system-config-selinux is a GUI tool available to customize SELinux pol‐
218 icy settings.
219
222 This manual page was auto-generated using sepolicy manpage .
223
226 selinux(8), postfix_local(8), semanage(8), restorecon(8), chcon(1),
227 sepolicy(8), setsebool(8)
228postfix_local 21-03-26 postfix_local_selinux(8)