1postfix_virtual_selinux(8S)ELinux Policy postfix_virtuaplostfix_virtual_selinux(8)
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6 postfix_virtual_selinux - Security Enhanced Linux Policy for the post‐
7 fix_virtual processes
8
10 Security-Enhanced Linux secures the postfix_virtual processes via flex‐
11 ible mandatory access control.
12 The postfix_virtual processes execute with the postfix_virtual_t
14 SELinux type. You can check if you have these processes running by exe‐
15 cuting the ps command with the -Z qualifier.
16 For example:
18 ps -eZ | grep postfix_virtual_t
20
24 The postfix_virtual_t SELinux type can be entered via the postfix_vir‐
25 tual_exec_t file type.
26 The default entrypoint paths for the postfix_virtual_t domain are the
28 following:
29 /usr/libexec/postfix/virtual
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_virtual policy is very flexible allowing users to setup their
40 postfix_virtual processes in as secure a method as possible.
41 The following process types are defined for postfix_virtual:
43 postfix_virtual_t
45 Note: semanage permissive -a postfix_virtual_t can be used to make the
47 process type postfix_virtual_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_virtual policy is extremely flexible and has several booleans that
55 allow you to manipulate the policy and run postfix_virtual with the
56 tightest access 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. Disabled by default.
91 setsebool -P nscd_use_shm 1
93
97 The SELinux process type postfix_virtual_t can manage files labeled
98 with the following file types. The paths listed are the default paths
99 for these file types. Note the processes UID still need to have DAC
100 permissions.
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 mail_spool_t
131 /var/mail(/.*)?
133 /var/spool/imap(/.*)?
134 /var/spool/mail(/.*)?
135 /var/spool/smtpd(/.*)?
136 nfs_t
138 postfix_spool_t
141 /var/spool/postfix.*
143 /var/spool/postfix/defer(/.*)?
144 /var/spool/postfix/flush(/.*)?
145 /var/spool/postfix/deferred(/.*)?
146 /var/spool/postfix/maildrop(/.*)?
147 postfix_var_run_t
149 /var/spool/postfix/pid/.*
151 postfix_virtual_tmp_t
153 user_home_t
156 /home/[^/]+/.+
158 user_home_type
160 all user home files
162
165 SELinux requires files to have an extended attribute to define the file
166 type.
167 You can see the context of a file using the -Z option to ls
169 Policy governs the access confined processes have to these files.
171 SELinux postfix_virtual policy is very flexible allowing users to setup
172 their postfix_virtual processes in as secure a method as possible.
173 STANDARD FILE CONTEXT
175 SELinux defines the file context types for the postfix_virtual, if you
177 wanted to store files with these types in a diffent paths, you need to
178 execute the semanage command to sepecify alternate labeling and then
179 use restorecon to put the labels on disk.
180 semanage fcontext -a -t postfix_virtual_tmp_t '/srv/mypostfix_vir‐
182 tual_content(/.*)?'
183 restorecon -R -v /srv/mypostfix_virtual_content
184 Note: SELinux often uses regular expressions to specify labels that
186 match multiple files.
187 The following file types are defined for postfix_virtual:
189 postfix_virtual_exec_t
193 - Set files with the postfix_virtual_exec_t type, if you want to tran‐
195 sition an executable to the postfix_virtual_t domain.
196 postfix_virtual_tmp_t
200 - Set files with the postfix_virtual_tmp_t type, if you want to store
202 postfix virtual temporary files in the /tmp directories.
203 Note: File context can be temporarily modified with the chcon command.
207 If you want to permanently change the file context you need to use the
208 semanage fcontext command. This will modify the SELinux labeling data‐
209 base. You will need to use restorecon to apply the labels.
210
213 semanage fcontext can also be used to manipulate default file context
214 mappings.
215 semanage permissive can also be used to manipulate whether or not a
217 process type is permissive.
218 semanage module can also be used to enable/disable/install/remove pol‐
220 icy modules.
221 semanage boolean can also be used to manipulate the booleans
223 system-config-selinux is a GUI tool available to customize SELinux pol‐
226 icy settings.
227
230 This manual page was auto-generated using sepolicy manpage .
231
234 selinux(8), postfix_virtual(8), semanage(8), restorecon(8), chcon(1),
235 sepolicy(8), setsebool(8)
236postfix_virtual 19-06-18 postfix_virtual_selinux(8)