1postfix_virtual_selinux(8S)ELinux Policy postfix_virtuaplostfix_virtual_selinux(8)
2
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 all domains to execute in fips_mode, you must turn
61 on the fips_mode boolean. Enabled by default.
62 setsebool -P fips_mode 1
64 If you want to allow system to run with NIS, you must turn on the
68 nis_enabled boolean. Disabled by default.
69 setsebool -P nis_enabled 1
71
75 The SELinux process type postfix_virtual_t can manage files labeled
76 with the following file types. The paths listed are the default paths
77 for these file types. Note the processes UID still need to have DAC
78 permissions.
79 cifs_t
81 dovecot_spool_t
84 /var/spool/dovecot(/.*)?
86 ecryptfs_t
88 /home/[^/]+/.Private(/.*)?
90 /home/[^/]+/.ecryptfs(/.*)?
91 fusefs_t
93 /var/run/user/[0-9]+/gvfs
95 krb5_host_rcache_t
97 /var/tmp/krb5_0.rcache2
99 /var/cache/krb5rcache(/.*)?
100 /var/tmp/nfs_0
101 /var/tmp/DNS_25
102 /var/tmp/host_0
103 /var/tmp/imap_0
104 /var/tmp/HTTP_23
105 /var/tmp/HTTP_48
106 /var/tmp/ldap_55
107 /var/tmp/ldap_487
108 /var/tmp/ldapmap1_0
109 mail_home_rw_t
111 /root/Maildir(/.*)?
113 /root/.esmtp_queue(/.*)?
114 /var/lib/arpwatch/.esmtp_queue(/.*)?
115 /var/cache/ddclient/.esmtp_queue(/.*)?
116 /home/[^/]+/.maildir(/.*)?
117 /home/[^/]+/Maildir(/.*)?
118 /home/[^/]+/.esmtp_queue(/.*)?
119 nfs_t
121 postfix_spool_t
124 /var/spool/postfix.*
126 /var/spool/postfix/defer(/.*)?
127 /var/spool/postfix/flush(/.*)?
128 /var/spool/postfix/deferred(/.*)?
129 /var/spool/postfix/maildrop(/.*)?
130 postfix_var_run_t
132 /var/spool/postfix/pid/.*
134 postfix_virtual_tmp_t
136 user_home_t
139 /home/[^/]+/.+
141 user_home_type
143 all user home files
145
148 SELinux requires files to have an extended attribute to define the file
149 type.
150 You can see the context of a file using the -Z option to ls
152 Policy governs the access confined processes have to these files.
154 SELinux postfix_virtual policy is very flexible allowing users to setup
155 their postfix_virtual processes in as secure a method as possible.
156 STANDARD FILE CONTEXT
158 SELinux defines the file context types for the postfix_virtual, if you
160 wanted to store files with these types in a different paths, you need
161 to execute the semanage command to specify alternate labeling and then
162 use restorecon to put the labels on disk.
163 semanage fcontext -a -t postfix_virtual_exec_t '/srv/postfix_vir‐
165 tual/content(/.*)?'
166 restorecon -R -v /srv/mypostfix_virtual_content
167 Note: SELinux often uses regular expressions to specify labels that
169 match multiple files.
170 The following file types are defined for postfix_virtual:
172 postfix_virtual_exec_t
176 - Set files with the postfix_virtual_exec_t type, if you want to tran‐
178 sition an executable to the postfix_virtual_t domain.
179 postfix_virtual_tmp_t
183 - Set files with the postfix_virtual_tmp_t type, if you want to store
185 postfix virtual temporary files in the /tmp directories.
186 Note: File context can be temporarily modified with the chcon command.
190 If you want to permanently change the file context you need to use the
191 semanage fcontext command. This will modify the SELinux labeling data‐
192 base. You will need to use restorecon to apply the labels.
193
196 semanage fcontext can also be used to manipulate default file context
197 mappings.
198 semanage permissive can also be used to manipulate whether or not a
200 process type is permissive.
201 semanage module can also be used to enable/disable/install/remove pol‐
203 icy modules.
204 semanage boolean can also be used to manipulate the booleans
206 system-config-selinux is a GUI tool available to customize SELinux pol‐
209 icy settings.
210
213 This manual page was auto-generated using sepolicy manpage .
214
217 selinux(8), postfix_virtual(8), semanage(8), restorecon(8), chcon(1),
218 sepolicy(8), setsebool(8)
219postfix_virtual 23-12-15 postfix_virtual_selinux(8)