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
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10 Security-Enhanced Linux secures the postfix_local processes via flexi‐
11 ble mandatory access control.
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13 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.
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17 For example:
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19 ps -eZ | grep postfix_local_t
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24 The postfix_local_t SELinux type can be entered via the post‐
25 fix_local_exec_t file type.
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27 The default entrypoint paths for the postfix_local_t domain are the
28 following:
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30 /usr/libexec/postfix/local
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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_local policy is very flexible allowing users to setup their
40 postfix_local processes in as secure a method as possible.
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42 The following process types are defined for postfix_local:
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44 postfix_local_t
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46 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.
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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.
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60 If you want to allow postfix_local domain full write access to
61 mail_spool directories, you must turn on the post‐
62 fix_local_write_mail_spool boolean. Enabled by default.
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64 setsebool -P postfix_local_write_mail_spool 1
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68 If you want to allow users to resolve user passwd entries directly from
69 ldap rather then using a sssd server, you must turn on the authlo‐
70 gin_nsswitch_use_ldap boolean. Disabled by default.
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72 setsebool -P authlogin_nsswitch_use_ldap 1
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76 If you want to allow all domains to execute in fips_mode, you must turn
77 on the fips_mode boolean. Enabled by default.
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79 setsebool -P fips_mode 1
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83 If you want to allow confined applications to run with kerberos, you
84 must turn on the kerberos_enabled boolean. Enabled by default.
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86 setsebool -P kerberos_enabled 1
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90 If you want to allow system to run with NIS, you must turn on the
91 nis_enabled boolean. Disabled by default.
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93 setsebool -P nis_enabled 1
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97 If you want to allow confined applications to use nscd shared memory,
98 you must turn on the nscd_use_shm boolean. Disabled by default.
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100 setsebool -P nscd_use_shm 1
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104 If you want to support NFS home directories, you must turn on the
105 use_nfs_home_dirs boolean. Disabled by default.
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107 setsebool -P use_nfs_home_dirs 1
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111 If you want to support SAMBA home directories, you must turn on the
112 use_samba_home_dirs boolean. Disabled by default.
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114 setsebool -P use_samba_home_dirs 1
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119 The SELinux process type postfix_local_t can manage files labeled with
120 the following file types. The paths listed are the default paths for
121 these file types. Note the processes UID still need to have DAC per‐
122 missions.
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124 anon_inodefs_t
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127 cifs_t
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130 dovecot_spool_t
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132 /var/spool/dovecot(/.*)?
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134 ecryptfs_t
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136 /home/[^/]+/.Private(/.*)?
137 /home/[^/]+/.ecryptfs(/.*)?
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139 fusefs_t
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141 /var/run/user/[^/]*/gvfs
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143 mail_home_rw_t
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145 /root/Maildir(/.*)?
146 /root/.esmtp_queue(/.*)?
147 /var/lib/arpwatch/.esmtp_queue(/.*)?
148 /home/[^/]+/.maildir(/.*)?
149 /home/[^/]+/Maildir(/.*)?
150 /home/[^/]+/.esmtp_queue(/.*)?
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152 mail_spool_t
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154 /var/mail(/.*)?
155 /var/spool/imap(/.*)?
156 /var/spool/mail(/.*)?
157 /var/spool/smtpd(/.*)?
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159 mailman_data_t
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161 /etc/mailman.*
162 /var/lib/mailman(/.*)?
163 /var/spool/mailman.*
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165 nfs_t
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168 postfix_local_tmp_t
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171 postfix_spool_t
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173 /var/spool/postfix.*
174 /var/spool/postfix/defer(/.*)?
175 /var/spool/postfix/flush(/.*)?
176 /var/spool/postfix/deferred(/.*)?
177 /var/spool/postfix/maildrop(/.*)?
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179 postfix_var_run_t
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181 /var/spool/postfix/pid/.*
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183 user_home_t
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185 /home/[^/]+/.+
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189 SELinux requires files to have an extended attribute to define the file
190 type.
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192 You can see the context of a file using the -Z option to ls
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194 Policy governs the access confined processes have to these files.
195 SELinux postfix_local policy is very flexible allowing users to setup
196 their postfix_local processes in as secure a method as possible.
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198 STANDARD FILE CONTEXT
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200 SELinux defines the file context types for the postfix_local, if you
201 wanted to store files with these types in a diffent paths, you need to
202 execute the semanage command to sepecify alternate labeling and then
203 use restorecon to put the labels on disk.
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205 semanage fcontext -a -t postfix_local_tmp_t '/srv/mypostfix_local_con‐
206 tent(/.*)?'
207 restorecon -R -v /srv/mypostfix_local_content
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209 Note: SELinux often uses regular expressions to specify labels that
210 match multiple files.
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212 The following file types are defined for postfix_local:
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216 postfix_local_exec_t
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218 - Set files with the postfix_local_exec_t type, if you want to transi‐
219 tion an executable to the postfix_local_t domain.
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223 postfix_local_tmp_t
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225 - Set files with the postfix_local_tmp_t type, if you want to store
226 postfix local temporary files in the /tmp directories.
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230 Note: File context can be temporarily modified with the chcon command.
231 If you want to permanently change the file context you need to use the
232 semanage fcontext command. This will modify the SELinux labeling data‐
233 base. You will need to use restorecon to apply the labels.
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237 semanage fcontext can also be used to manipulate default file context
238 mappings.
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240 semanage permissive can also be used to manipulate whether or not a
241 process type is permissive.
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243 semanage module can also be used to enable/disable/install/remove pol‐
244 icy modules.
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246 semanage boolean can also be used to manipulate the booleans
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249 system-config-selinux is a GUI tool available to customize SELinux pol‐
250 icy settings.
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254 This manual page was auto-generated using sepolicy manpage .
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258 selinux(8), postfix_local(8), semanage(8), restorecon(8), chcon(1),
259 sepolicy(8), setsebool(8)
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263postfix_local 19-05-30 postfix_local_selinux(8)