1postfix_local_selinux(8) SELinux Policy postfix_local postfix_local_selinux(8)
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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 postfix_lo‐
25 cal_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 postfix_lo‐
62 cal_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. Disabled 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 cifs_t
103 dovecot_spool_t
106 /var/spool/dovecot(/.*)?
108 ecryptfs_t
110 /home/[^/]+/.Private(/.*)?
112 /home/[^/]+/.ecryptfs(/.*)?
113 fusefs_t
115 /var/run/user/[^/]*/gvfs
117 krb5_host_rcache_t
119 /var/tmp/krb5_0.rcache2
121 /var/cache/krb5rcache(/.*)?
122 /var/tmp/nfs_0
123 /var/tmp/DNS_25
124 /var/tmp/host_0
125 /var/tmp/imap_0
126 /var/tmp/HTTP_23
127 /var/tmp/HTTP_48
128 /var/tmp/ldap_55
129 /var/tmp/ldap_487
130 /var/tmp/ldapmap1_0
131 mail_home_rw_t
133 /root/Maildir(/.*)?
135 /root/.esmtp_queue(/.*)?
136 /var/lib/arpwatch/.esmtp_queue(/.*)?
137 /home/[^/]+/.maildir(/.*)?
138 /home/[^/]+/Maildir(/.*)?
139 /home/[^/]+/.esmtp_queue(/.*)?
140 mailman_data_t
142 /etc/mailman.*
144 /var/lib/mailman(/.*)?
145 /var/spool/mailman.*
146 nfs_t
148 postfix_local_tmp_t
151 postfix_spool_t
154 /var/spool/postfix.*
156 /var/spool/postfix/defer(/.*)?
157 /var/spool/postfix/flush(/.*)?
158 /var/spool/postfix/deferred(/.*)?
159 /var/spool/postfix/maildrop(/.*)?
160 postfix_var_run_t
162 /var/spool/postfix/pid/.*
164 user_home_t
166 /home/[^/]+/.+
168
171 SELinux requires files to have an extended attribute to define the file
172 type.
173 You can see the context of a file using the -Z option to ls
175 Policy governs the access confined processes have to these files.
177 SELinux postfix_local policy is very flexible allowing users to setup
178 their postfix_local processes in as secure a method as possible.
179 STANDARD FILE CONTEXT
181 SELinux defines the file context types for the postfix_local, if you
183 wanted to store files with these types in a diffent paths, you need to
184 execute the semanage command to specify alternate labeling and then use
185 restorecon to put the labels on disk.
186 semanage fcontext -a -t postfix_local_tmp_t '/srv/mypostfix_local_con‐
188 tent(/.*)?'
189 restorecon -R -v /srv/mypostfix_local_content
190 Note: SELinux often uses regular expressions to specify labels that
192 match multiple files.
193 The following file types are defined for postfix_local:
195 postfix_local_exec_t
199 - Set files with the postfix_local_exec_t type, if you want to transi‐
201 tion an executable to the postfix_local_t domain.
202 postfix_local_tmp_t
206 - Set files with the postfix_local_tmp_t type, if you want to store
208 postfix local temporary files in the /tmp directories.
209 Note: File context can be temporarily modified with the chcon command.
213 If you want to permanently change the file context you need to use the
214 semanage fcontext command. This will modify the SELinux labeling data‐
215 base. You will need to use restorecon to apply the labels.
216
219 semanage fcontext can also be used to manipulate default file context
220 mappings.
221 semanage permissive can also be used to manipulate whether or not a
223 process type is permissive.
224 semanage module can also be used to enable/disable/install/remove pol‐
226 icy modules.
227 semanage boolean can also be used to manipulate the booleans
229 system-config-selinux is a GUI tool available to customize SELinux pol‐
232 icy settings.
233
236 This manual page was auto-generated using sepolicy manpage .
237
240 selinux(8), postfix_local(8), semanage(8), restorecon(8), chcon(1), se‐
241 policy(8), setsebool(8)
242postfix_local 21-11-19 postfix_local_selinux(8)