1sendmail_selinux(8) SELinux Policy sendmail sendmail_selinux(8)
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6 sendmail_selinux - Security Enhanced Linux Policy for the sendmail pro‐
7 cesses
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10 Security-Enhanced Linux secures the sendmail processes via flexible
11 mandatory access control.
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13 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.
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17 For example:
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19 ps -eZ | grep sendmail_t
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24 The sendmail_t SELinux type can be entered via the mta_exec_type file
25 type.
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27 The default entrypoint paths for the sendmail_t domain are the follow‐
28 ing:
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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 sendmail policy is very flexible allowing users to setup their sendmail
40 processes in as secure a method as possible.
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42 The following process types are defined for sendmail:
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44 sendmail_t
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46 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.
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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.
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60 If you want to allow all domains to execute in fips_mode, you must turn
61 on the fips_mode boolean. Enabled by default.
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63 setsebool -P fips_mode 1
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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.
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72 cifs_t
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75 dovecot_spool_t
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77 /var/spool/dovecot(/.*)?
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79 ecryptfs_t
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81 /home/[^/]+/.Private(/.*)?
82 /home/[^/]+/.ecryptfs(/.*)?
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84 etc_aliases_t
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86 /etc/mail/.*.db
87 /etc/mail/aliases.*
88 /etc/postfix/aliases.*
89 /etc/aliases
90 /etc/aliases.db
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92 exim_spool_t
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94 /var/spool/exim[0-9]?(/.*)?
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96 fusefs_t
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98 /var/run/user/[^/]*/gvfs
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100 krb5_host_rcache_t
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102 /var/tmp/krb5_0.rcache2
103 /var/cache/krb5rcache(/.*)?
104 /var/tmp/nfs_0
105 /var/tmp/DNS_25
106 /var/tmp/host_0
107 /var/tmp/imap_0
108 /var/tmp/HTTP_23
109 /var/tmp/HTTP_48
110 /var/tmp/ldap_55
111 /var/tmp/ldap_487
112 /var/tmp/ldapmap1_0
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114 mail_home_rw_t
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116 /root/Maildir(/.*)?
117 /root/.esmtp_queue(/.*)?
118 /var/lib/arpwatch/.esmtp_queue(/.*)?
119 /home/[^/]+/.maildir(/.*)?
120 /home/[^/]+/Maildir(/.*)?
121 /home/[^/]+/.esmtp_queue(/.*)?
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123 mailman_data_t
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125 /etc/mailman.*
126 /var/lib/mailman(/.*)?
127 /var/spool/mailman.*
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129 mqueue_spool_t
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131 /var/spool/(client)?mqueue(/.*)?
132 /var/spool/mqueue.in(/.*)?
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134 nfs_t
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137 sendmail_log_t
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139 /var/log/mail(/.*)?
140 /var/log/sendmail.st.*
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142 sendmail_var_run_t
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144 /var/run/sendmail.pid
145 /var/run/sm-client.pid
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147 user_home_t
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149 /home/[^/]+/.+
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153 SELinux requires files to have an extended attribute to define the file
154 type.
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156 You can see the context of a file using the -Z option to ls
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158 Policy governs the access confined processes have to these files.
159 SELinux sendmail policy is very flexible allowing users to setup their
160 sendmail processes in as secure a method as possible.
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162 STANDARD FILE CONTEXT
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164 SELinux defines the file context types for the sendmail, if you wanted
165 to store files with these types in a diffent paths, you need to execute
166 the semanage command to sepecify alternate labeling and then use re‐
167 storecon to put the labels on disk.
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169 semanage fcontext -a -t sendmail_var_run_t '/srv/mysendmail_con‐
170 tent(/.*)?'
171 restorecon -R -v /srv/mysendmail_content
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173 Note: SELinux often uses regular expressions to specify labels that
174 match multiple files.
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176 The following file types are defined for sendmail:
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180 sendmail_exec_t
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182 - Set files with the sendmail_exec_t type, if you want to transition an
183 executable to the sendmail_t domain.
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186 Paths:
187 /usr/sbin/sendmail(.sendmail)?, /usr/bin/esmtp, /usr/sbin/rmail,
188 /usr/sbin/ssmtp, /usr/lib/sendmail, /usr/bin/esmtp-wrapper,
189 /var/qmail/bin/sendmail, /usr/sbin/sendmail.postfix
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192 sendmail_initrc_exec_t
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194 - Set files with the sendmail_initrc_exec_t type, if you want to tran‐
195 sition an executable to the sendmail_initrc_t domain.
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199 sendmail_keytab_t
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201 - Set files with the sendmail_keytab_t type, if you want to treat the
202 files as kerberos keytab files.
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206 sendmail_log_t
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208 - Set files with the sendmail_log_t type, if you want to treat the data
209 as sendmail log data, usually stored under the /var/log directory.
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212 Paths:
213 /var/log/mail(/.*)?, /var/log/sendmail.st.*
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216 sendmail_tmp_t
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218 - Set files with the sendmail_tmp_t type, if you want to store sendmail
219 temporary files in the /tmp directories.
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223 sendmail_var_run_t
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225 - Set files with the sendmail_var_run_t type, if you want to store the
226 sendmail files under the /run or /var/run directory.
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229 Paths:
230 /var/run/sendmail.pid, /var/run/sm-client.pid
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233 Note: File context can be temporarily modified with the chcon command.
234 If you want to permanently change the file context you need to use the
235 semanage fcontext command. This will modify the SELinux labeling data‐
236 base. You will need to use restorecon to apply the labels.
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240 semanage fcontext can also be used to manipulate default file context
241 mappings.
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243 semanage permissive can also be used to manipulate whether or not a
244 process type is permissive.
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246 semanage module can also be used to enable/disable/install/remove pol‐
247 icy modules.
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249 semanage boolean can also be used to manipulate the booleans
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252 system-config-selinux is a GUI tool available to customize SELinux pol‐
253 icy settings.
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257 This manual page was auto-generated using sepolicy manpage .
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261 selinux(8), sendmail(8), semanage(8), restorecon(8), chcon(1), sepol‐
262 icy(8), setsebool(8)
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266sendmail 21-06-09 sendmail_selinux(8)