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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67 If you want to allow system to run with NIS, you must turn on the
68 nis_enabled boolean. Disabled by default.
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70 setsebool -P nis_enabled 1
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75 The SELinux process type sendmail_t can manage files labeled with the
76 following file types. The paths listed are the default paths for these
77 file types. Note the processes UID still need to have DAC permissions.
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79 cifs_t
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82 dovecot_spool_t
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84 /var/spool/dovecot(/.*)?
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86 ecryptfs_t
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88 /home/[^/]+/.Private(/.*)?
89 /home/[^/]+/.ecryptfs(/.*)?
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91 etc_aliases_t
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93 /etc/mail/.*.db
94 /etc/mail/aliases.*
95 /etc/postfix/aliases.*
96 /etc/aliases
97 /etc/aliases.db
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99 exim_spool_t
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101 /var/spool/exim[0-9]?(/.*)?
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103 fusefs_t
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105 /var/run/user/[0-9]+/gvfs
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107 krb5_host_rcache_t
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109 /var/tmp/krb5_0.rcache2
110 /var/cache/krb5rcache(/.*)?
111 /var/tmp/nfs_0
112 /var/tmp/DNS_25
113 /var/tmp/host_0
114 /var/tmp/imap_0
115 /var/tmp/HTTP_23
116 /var/tmp/HTTP_48
117 /var/tmp/ldap_55
118 /var/tmp/ldap_487
119 /var/tmp/ldapmap1_0
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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 /var/cache/ddclient/.esmtp_queue(/.*)?
127 /home/[^/]+/.maildir(/.*)?
128 /home/[^/]+/Maildir(/.*)?
129 /home/[^/]+/.esmtp_queue(/.*)?
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131 mailman_data_t
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133 /etc/mailman.*
134 /var/lib/mailman(/.*)?
135 /var/spool/mailman.*
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137 mqueue_spool_t
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139 /var/spool/(client)?mqueue(/.*)?
140 /var/spool/mqueue.in(/.*)?
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142 nfs_t
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145 sendmail_log_t
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147 /var/log/mail(/.*)?
148 /var/log/sendmail.st.*
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150 sendmail_var_run_t
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152 /var/run/smtpd.sock
153 /var/run/sendmail.pid
154 /var/run/sm-client.pid
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156 user_home_t
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158 /home/[^/]+/.+
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162 SELinux requires files to have an extended attribute to define the file
163 type.
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165 You can see the context of a file using the -Z option to ls
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167 Policy governs the access confined processes have to these files.
168 SELinux sendmail policy is very flexible allowing users to setup their
169 sendmail processes in as secure a method as possible.
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171 STANDARD FILE CONTEXT
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173 SELinux defines the file context types for the sendmail, if you wanted
174 to store files with these types in a different paths, you need to exe‐
175 cute the semanage command to specify alternate labeling and then use
176 restorecon to put the labels on disk.
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178 semanage fcontext -a -t sendmail_exec_t '/srv/sendmail/content(/.*)?'
179 restorecon -R -v /srv/mysendmail_content
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181 Note: SELinux often uses regular expressions to specify labels that
182 match multiple files.
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184 The following file types are defined for sendmail:
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188 sendmail_exec_t
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190 - Set files with the sendmail_exec_t type, if you want to transition an
191 executable to the sendmail_t domain.
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194 Paths:
195 /usr/sbin/sendmail(.sendmail)?, /usr/bin/esmtp, /usr/bin/msmtp,
196 /usr/bin/msmtpd, /usr/sbin/rmail, /usr/sbin/smtpd,
197 /usr/sbin/ssmtp, /usr/lib/sendmail, /usr/bin/esmtp-wrapper,
198 /var/qmail/bin/sendmail, /usr/sbin/sendmail.postfix
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201 sendmail_initrc_exec_t
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203 - Set files with the sendmail_initrc_exec_t type, if you want to tran‐
204 sition an executable to the sendmail_initrc_t domain.
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208 sendmail_keytab_t
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210 - Set files with the sendmail_keytab_t type, if you want to treat the
211 files as kerberos keytab files.
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215 sendmail_log_t
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217 - Set files with the sendmail_log_t type, if you want to treat the data
218 as sendmail log data, usually stored under the /var/log directory.
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221 Paths:
222 /var/log/mail(/.*)?, /var/log/sendmail.st.*
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225 sendmail_tmp_t
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227 - Set files with the sendmail_tmp_t type, if you want to store sendmail
228 temporary files in the /tmp directories.
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232 sendmail_var_run_t
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234 - Set files with the sendmail_var_run_t type, if you want to store the
235 sendmail files under the /run or /var/run directory.
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238 Paths:
239 /var/run/smtpd.sock, /var/run/sendmail.pid, /var/run/sm-client.pid
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242 Note: File context can be temporarily modified with the chcon command.
243 If you want to permanently change the file context you need to use the
244 semanage fcontext command. This will modify the SELinux labeling data‐
245 base. You will need to use restorecon to apply the labels.
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249 semanage fcontext can also be used to manipulate default file context
250 mappings.
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252 semanage permissive can also be used to manipulate whether or not a
253 process type is permissive.
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255 semanage module can also be used to enable/disable/install/remove pol‐
256 icy modules.
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258 semanage boolean can also be used to manipulate the booleans
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261 system-config-selinux is a GUI tool available to customize SELinux pol‐
262 icy settings.
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266 This manual page was auto-generated using sepolicy manpage .
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270 selinux(8), sendmail(8), semanage(8), restorecon(8), chcon(1), sepol‐
271 icy(8), setsebool(8)
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275sendmail 23-12-15 sendmail_selinux(8)