1sendmail_selinux(8) SELinux Policy sendmail sendmail_selinux(8)
2
6 sendmail_selinux - Security Enhanced Linux Policy for the sendmail pro‐
7 cesses
8
10 Security-Enhanced Linux secures the sendmail processes via flexible
11 mandatory access control.
12 The sendmail processes execute with the sendmail_t SELinux type. You
14 can check if you have these processes running by executing the ps com‐
15 mand with the -Z qualifier.
16 For example:
18 ps -eZ | grep sendmail_t
20
24 The sendmail_t SELinux type can be entered via the mta_exec_type file
25 type.
26 The default entrypoint paths for the sendmail_t domain are the follow‐
28 ing:
29
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 sendmail policy is very flexible allowing users to setup their sendmail
40 processes in as secure a method as possible.
41 The following process types are defined for sendmail:
43 sendmail_t
45 Note: semanage permissive -a sendmail_t can be used to make the process
47 type sendmail_t permissive. SELinux does not deny access to permissive
48 process types, but the AVC (SELinux denials) messages are still gener‐
49 ated.
50
53 SELinux policy is customizable based on least access required. send‐
54 mail policy is extremely flexible and has several booleans that allow
55 you to manipulate the policy and run sendmail with the tightest access
56 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
68 The SELinux process type sendmail_t can manage files labeled with the
69 following file types. The paths listed are the default paths for these
70 file types. Note the processes UID still need to have DAC permissions.
71 anon_inodefs_t
73 cifs_t
76 dovecot_spool_t
79 /var/spool/dovecot(/.*)?
81 ecryptfs_t
83 /home/[^/]+/.Private(/.*)?
85 /home/[^/]+/.ecryptfs(/.*)?
86 etc_aliases_t
88 /etc/mail/.*.db
90 /etc/mail/aliases.*
91 /etc/postfix/aliases.*
92 /etc/aliases
93 /etc/aliases.db
94 exim_spool_t
96 /var/spool/exim[0-9]?(/.*)?
98 fusefs_t
100 /var/run/user/[^/]*/gvfs
102 mail_home_rw_t
104 /root/Maildir(/.*)?
106 /root/.esmtp_queue(/.*)?
107 /var/lib/arpwatch/.esmtp_queue(/.*)?
108 /home/[^/]+/.maildir(/.*)?
109 /home/[^/]+/Maildir(/.*)?
110 /home/[^/]+/.esmtp_queue(/.*)?
111 mailman_data_t
113 /etc/mailman.*
115 /var/lib/mailman(/.*)?
116 /var/spool/mailman.*
117 mqueue_spool_t
119 /var/spool/(client)?mqueue(/.*)?
121 /var/spool/mqueue.in(/.*)?
122 nfs_t
124 sendmail_log_t
127 /var/log/mail(/.*)?
129 /var/log/sendmail.st.*
130 sendmail_var_run_t
132 /var/run/sendmail.pid
134 /var/run/sm-client.pid
135 user_home_t
137 /home/[^/]+/.+
139
142 SELinux requires files to have an extended attribute to define the file
143 type.
144 You can see the context of a file using the -Z option to ls
146 Policy governs the access confined processes have to these files.
148 SELinux sendmail policy is very flexible allowing users to setup their
149 sendmail processes in as secure a method as possible.
150 STANDARD FILE CONTEXT
152 SELinux defines the file context types for the sendmail, if you wanted
154 to store files with these types in a diffent paths, you need to execute
155 the semanage command to sepecify alternate labeling and then use
156 restorecon to put the labels on disk.
157 semanage fcontext -a -t sendmail_var_run_t '/srv/mysendmail_con‐
159 tent(/.*)?'
160 restorecon -R -v /srv/mysendmail_content
161 Note: SELinux often uses regular expressions to specify labels that
163 match multiple files.
164 The following file types are defined for sendmail:
166 sendmail_exec_t
170 - Set files with the sendmail_exec_t type, if you want to transition an
172 executable to the sendmail_t domain.
173 Paths:
176 /usr/sbin/sendmail(.sendmail)?, /usr/bin/esmtp, /usr/sbin/rmail,
177 /usr/sbin/ssmtp, /usr/lib/sendmail, /usr/bin/esmtp-wrapper,
178 /var/qmail/bin/sendmail, /usr/sbin/sendmail.postfix
179 sendmail_initrc_exec_t
182 - Set files with the sendmail_initrc_exec_t type, if you want to tran‐
184 sition an executable to the sendmail_initrc_t domain.
185 sendmail_keytab_t
189 - Set files with the sendmail_keytab_t type, if you want to treat the
191 files as kerberos keytab files.
192 sendmail_log_t
196 - Set files with the sendmail_log_t type, if you want to treat the data
198 as sendmail log data, usually stored under the /var/log directory.
199 Paths:
202 /var/log/mail(/.*)?, /var/log/sendmail.st.*
203 sendmail_tmp_t
206 - Set files with the sendmail_tmp_t type, if you want to store sendmail
208 temporary files in the /tmp directories.
209 sendmail_var_run_t
213 - Set files with the sendmail_var_run_t type, if you want to store the
215 sendmail files under the /run or /var/run directory.
216 Paths:
219 /var/run/sendmail.pid, /var/run/sm-client.pid
220 Note: File context can be temporarily modified with the chcon command.
223 If you want to permanently change the file context you need to use the
224 semanage fcontext command. This will modify the SELinux labeling data‐
225 base. You will need to use restorecon to apply the labels.
226
229 semanage fcontext can also be used to manipulate default file context
230 mappings.
231 semanage permissive can also be used to manipulate whether or not a
233 process type is permissive.
234 semanage module can also be used to enable/disable/install/remove pol‐
236 icy modules.
237 semanage boolean can also be used to manipulate the booleans
239 system-config-selinux is a GUI tool available to customize SELinux pol‐
242 icy settings.
243
246 This manual page was auto-generated using sepolicy manpage .
247
250 selinux(8), sendmail(8), semanage(8), restorecon(8), chcon(1), sepol‐
251 icy(8), setsebool(8)
252sendmail 21-03-26 sendmail_selinux(8)