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 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/[^/]*/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 /home/[^/]+/.maildir(/.*)?
116 /home/[^/]+/Maildir(/.*)?
117 /home/[^/]+/.esmtp_queue(/.*)?
118 nfs_t
120 postfix_spool_t
123 /var/spool/postfix.*
125 /var/spool/postfix/defer(/.*)?
126 /var/spool/postfix/flush(/.*)?
127 /var/spool/postfix/deferred(/.*)?
128 /var/spool/postfix/maildrop(/.*)?
129 postfix_var_run_t
131 /var/spool/postfix/pid/.*
133 postfix_virtual_tmp_t
135 user_home_t
138 /home/[^/]+/.+
140 user_home_type
142 all user home files
144
147 SELinux requires files to have an extended attribute to define the file
148 type.
149 You can see the context of a file using the -Z option to ls
151 Policy governs the access confined processes have to these files.
153 SELinux postfix_virtual policy is very flexible allowing users to setup
154 their postfix_virtual processes in as secure a method as possible.
155 STANDARD FILE CONTEXT
157 SELinux defines the file context types for the postfix_virtual, if you
159 wanted to store files with these types in a diffent paths, you need to
160 execute the semanage command to specify alternate labeling and then use
161 restorecon to put the labels on disk.
162 semanage fcontext -a -t postfix_virtual_tmp_t '/srv/mypostfix_vir‐
164 tual_content(/.*)?'
165 restorecon -R -v /srv/mypostfix_virtual_content
166 Note: SELinux often uses regular expressions to specify labels that
168 match multiple files.
169 The following file types are defined for postfix_virtual:
171 postfix_virtual_exec_t
175 - Set files with the postfix_virtual_exec_t type, if you want to tran‐
177 sition an executable to the postfix_virtual_t domain.
178 postfix_virtual_tmp_t
182 - Set files with the postfix_virtual_tmp_t type, if you want to store
184 postfix virtual temporary files in the /tmp directories.
185 Note: File context can be temporarily modified with the chcon command.
189 If you want to permanently change the file context you need to use the
190 semanage fcontext command. This will modify the SELinux labeling data‐
191 base. You will need to use restorecon to apply the labels.
192
195 semanage fcontext can also be used to manipulate default file context
196 mappings.
197 semanage permissive can also be used to manipulate whether or not a
199 process type is permissive.
200 semanage module can also be used to enable/disable/install/remove pol‐
202 icy modules.
203 semanage boolean can also be used to manipulate the booleans
205 system-config-selinux is a GUI tool available to customize SELinux pol‐
208 icy settings.
209
212 This manual page was auto-generated using sepolicy manpage .
213
216 selinux(8), postfix_virtual(8), semanage(8), restorecon(8), chcon(1),
217 sepolicy(8), setsebool(8)
218postfix_virtual 21-11-19 postfix_virtual_selinux(8)