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
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10 Security-Enhanced Linux secures the postfix_virtual processes via flex‐
11 ible mandatory access control.
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13 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.
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17 For example:
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19 ps -eZ | grep postfix_virtual_t
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24 The postfix_virtual_t SELinux type can be entered via the postfix_vir‐
25 tual_exec_t file type.
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27 The default entrypoint paths for the postfix_virtual_t domain are the
28 following:
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30 /usr/libexec/postfix/virtual
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33 SELinux defines process types (domains) for each process running on the
34 system
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36 You can see the context of a process using the -Z option to ps
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38 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.
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42 The following process types are defined for postfix_virtual:
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44 postfix_virtual_t
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46 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.
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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.
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60 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.
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64 setsebool -P authlogin_nsswitch_use_ldap 1
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68 If you want to allow all domains to execute in fips_mode, you must turn
69 on the fips_mode boolean. Enabled by default.
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71 setsebool -P fips_mode 1
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75 If you want to allow confined applications to run with kerberos, you
76 must turn on the kerberos_enabled boolean. Enabled by default.
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78 setsebool -P kerberos_enabled 1
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82 If you want to allow system to run with NIS, you must turn on the
83 nis_enabled boolean. Disabled by default.
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85 setsebool -P nis_enabled 1
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89 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.
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92 setsebool -P nscd_use_shm 1
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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.
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102 anon_inodefs_t
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105 cifs_t
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108 dovecot_spool_t
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110 /var/spool/dovecot(/.*)?
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112 ecryptfs_t
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114 /home/[^/]+/.Private(/.*)?
115 /home/[^/]+/.ecryptfs(/.*)?
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117 fusefs_t
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119 /var/run/user/[^/]*/gvfs
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121 mail_home_rw_t
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123 /root/Maildir(/.*)?
124 /root/.esmtp_queue(/.*)?
125 /var/lib/arpwatch/.esmtp_queue(/.*)?
126 /home/[^/]+/.maildir(/.*)?
127 /home/[^/]+/Maildir(/.*)?
128 /home/[^/]+/.esmtp_queue(/.*)?
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130 mail_spool_t
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132 /var/mail(/.*)?
133 /var/spool/imap(/.*)?
134 /var/spool/mail(/.*)?
135 /var/spool/smtpd(/.*)?
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137 nfs_t
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140 postfix_spool_t
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142 /var/spool/postfix.*
143 /var/spool/postfix/defer(/.*)?
144 /var/spool/postfix/flush(/.*)?
145 /var/spool/postfix/deferred(/.*)?
146 /var/spool/postfix/maildrop(/.*)?
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148 postfix_var_run_t
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150 /var/spool/postfix/pid/.*
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152 postfix_virtual_tmp_t
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155 user_home_t
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157 /home/[^/]+/.+
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159 user_home_type
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161 all user home files
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165 SELinux requires files to have an extended attribute to define the file
166 type.
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168 You can see the context of a file using the -Z option to ls
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170 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.
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174 STANDARD FILE CONTEXT
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176 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.
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181 semanage fcontext -a -t postfix_virtual_tmp_t '/srv/mypostfix_vir‐
182 tual_content(/.*)?'
183 restorecon -R -v /srv/mypostfix_virtual_content
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185 Note: SELinux often uses regular expressions to specify labels that
186 match multiple files.
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188 The following file types are defined for postfix_virtual:
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192 postfix_virtual_exec_t
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194 - Set files with the postfix_virtual_exec_t type, if you want to tran‐
195 sition an executable to the postfix_virtual_t domain.
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199 postfix_virtual_tmp_t
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201 - Set files with the postfix_virtual_tmp_t type, if you want to store
202 postfix virtual temporary files in the /tmp directories.
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206 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.
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213 semanage fcontext can also be used to manipulate default file context
214 mappings.
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216 semanage permissive can also be used to manipulate whether or not a
217 process type is permissive.
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219 semanage module can also be used to enable/disable/install/remove pol‐
220 icy modules.
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222 semanage boolean can also be used to manipulate the booleans
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225 system-config-selinux is a GUI tool available to customize SELinux pol‐
226 icy settings.
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230 This manual page was auto-generated using sepolicy manpage .
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234 selinux(8), postfix_virtual(8), semanage(8), restorecon(8), chcon(1),
235 sepolicy(8), setsebool(8)
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239postfix_virtual 19-05-30 postfix_virtual_selinux(8)