sendmail_selinux(8)

1sendmail_selinux(8)         SELinux Policy sendmail        sendmail_selinux(8)
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NAME

6       sendmail_selinux - Security Enhanced Linux Policy for the sendmail pro‐
7       cesses
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DESCRIPTION

10       Security-Enhanced Linux secures the  sendmail  processes  via  flexible
11       mandatory access control.
12
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.
16
17       For example:
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19       ps -eZ | grep sendmail_t
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ENTRYPOINTS

24       The sendmail_t SELinux type can be entered via the mta_exec_type, send‐
25       mail_exec_t, mta_exec_type file types.
26
27       The default entrypoint paths for the sendmail_t domain are the  follow‐
28       ing:
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30       /usr/sbin/sendmail(.sendmail)?,     /usr/bin/esmtp,    /usr/sbin/rmail,
31       /usr/sbin/ssmtp,       /usr/lib/sendmail,       /usr/bin/esmtp-wrapper,
32       /var/qmail/bin/sendmail, /usr/sbin/sendmail.postfix
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PROCESS TYPES

35       SELinux defines process types (domains) for each process running on the
36       system
37
38       You can see the context of a process using the -Z option to ps
39
40       Policy governs the access confined processes have  to  files.   SELinux
41       sendmail policy is very flexible allowing users to setup their sendmail
42       processes in as secure a method as possible.
43
44       The following process types are defined for sendmail:
45
46       sendmail_t
47
48       Note: semanage permissive -a sendmail_t can be used to make the process
49       type  sendmail_t permissive. SELinux does not deny access to permissive
50       process types, but the AVC (SELinux denials) messages are still  gener‐
51       ated.
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BOOLEANS

55       SELinux  policy  is customizable based on least access required.  send‐
56       mail policy is extremely flexible and has several booleans  that  allow
57       you  to manipulate the policy and run sendmail with the tightest access
58       possible.
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61
62       If you want to allow users to resolve user passwd entries directly from
63       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
64       gin_nsswitch_use_ldap boolean. Disabled by default.
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66       setsebool -P authlogin_nsswitch_use_ldap 1
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70       If you want to allow all domains to execute in fips_mode, you must turn
71       on the fips_mode boolean. Enabled by default.
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73       setsebool -P fips_mode 1
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77       If  you  want  to allow confined applications to run with kerberos, you
78       must turn on the kerberos_enabled boolean. Enabled by default.
79
80       setsebool -P kerberos_enabled 1
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84       If you want to allow system to run with  NIS,  you  must  turn  on  the
85       nis_enabled boolean. Disabled by default.
86
87       setsebool -P nis_enabled 1
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91       If  you  want to allow confined applications to use nscd shared memory,
92       you must turn on the nscd_use_shm boolean. Enabled by default.
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94       setsebool -P nscd_use_shm 1
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98       If you want to allow Redis to run redis-sentinal notification  scripts,
99       you must turn on the redis_enable_notify boolean. Disabled by default.
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101       setsebool -P redis_enable_notify 1
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MANAGED FILES

106       The  SELinux  process type sendmail_t can manage files labeled with the
107       following file types.  The paths listed are the default paths for these
108       file types.  Note the processes UID still need to have DAC permissions.
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110       anon_inodefs_t
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113       cifs_t
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116       dovecot_spool_t
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118            /var/spool/dovecot(/.*)?
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120       ecryptfs_t
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122            /home/[^/]+/.Private(/.*)?
123            /home/[^/]+/.ecryptfs(/.*)?
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125       etc_aliases_t
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127            /etc/mail/.*.db
128            /etc/mail/aliases.*
129            /etc/postfix/aliases.*
130            /etc/aliases
131            /etc/aliases.db
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133       exim_spool_t
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135            /var/spool/exim[0-9]?(/.*)?
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137       fusefs_t
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139            /var/run/user/[^/]*/gvfs
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141       initrc_tmp_t
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144       mail_home_rw_t
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146            /root/Maildir(/.*)?
147            /root/.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       mqueue_spool_t
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167            /var/spool/(client)?mqueue(/.*)?
168            /var/spool/mqueue.in(/.*)?
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170       nfs_t
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173       procmail_tmp_t
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176       sendmail_log_t
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178            /var/log/mail(/.*)?
179            /var/log/sendmail.st.*
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181       sendmail_tmp_t
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183
184       sendmail_var_run_t
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186            /var/run/sendmail.pid
187            /var/run/sm-client.pid
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189       user_home_t
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191            /home/[^/]+/.+
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FILE CONTEXTS

195       SELinux requires files to have an extended attribute to define the file
196       type.
197
198       You can see the context of a file using the -Z option to ls
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200       Policy governs the access  confined  processes  have  to  these  files.
201       SELinux  sendmail policy is very flexible allowing users to setup their
202       sendmail processes in as secure a method as possible.
203
204       STANDARD FILE CONTEXT
205
206       SELinux defines the file context types for the sendmail, if you  wanted
207       to store files with these types in a diffent paths, you need to execute
208       the semanage command  to  sepecify  alternate  labeling  and  then  use
209       restorecon to put the labels on disk.
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211       semanage   fcontext   -a  -t  sendmail_var_run_t  '/srv/mysendmail_con‐
212       tent(/.*)?'
213       restorecon -R -v /srv/mysendmail_content
214
215       Note: SELinux often uses regular expressions  to  specify  labels  that
216       match multiple files.
217
218       The following file types are defined for sendmail:
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222       sendmail_exec_t
223
224       - Set files with the sendmail_exec_t type, if you want to transition an
225       executable to the sendmail_t domain.
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227
228       Paths:
229            /usr/sbin/sendmail(.sendmail)?,  /usr/bin/esmtp,  /usr/sbin/rmail,
230            /usr/sbin/ssmtp,     /usr/lib/sendmail,    /usr/bin/esmtp-wrapper,
231            /var/qmail/bin/sendmail, /usr/sbin/sendmail.postfix
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233
234       sendmail_initrc_exec_t
235
236       - Set files with the sendmail_initrc_exec_t type, if you want to  tran‐
237       sition an executable to the sendmail_initrc_t domain.
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241       sendmail_keytab_t
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243       -  Set  files with the sendmail_keytab_t type, if you want to treat the
244       files as kerberos keytab files.
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248       sendmail_log_t
249
250       - Set files with the sendmail_log_t type, if you want to treat the data
251       as sendmail log data, usually stored under the /var/log directory.
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253
254       Paths:
255            /var/log/mail(/.*)?, /var/log/sendmail.st.*
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258       sendmail_tmp_t
259
260       - Set files with the sendmail_tmp_t type, if you want to store sendmail
261       temporary files in the /tmp directories.
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265       sendmail_var_run_t
266
267       - Set files with the sendmail_var_run_t type, if you want to store  the
268       sendmail files under the /run or /var/run directory.
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270
271       Paths:
272            /var/run/sendmail.pid, /var/run/sm-client.pid
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274
275       Note:  File context can be temporarily modified with the chcon command.
276       If you want to permanently change the file context you need to use  the
277       semanage fcontext command.  This will modify the SELinux labeling data‐
278       base.  You will need to use restorecon to apply the labels.
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COMMANDS

282       semanage fcontext can also be used to manipulate default  file  context
283       mappings.
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285       semanage  permissive  can  also  be used to manipulate whether or not a
286       process type is permissive.
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288       semanage module can also be used to enable/disable/install/remove  pol‐
289       icy modules.
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291       semanage boolean can also be used to manipulate the booleans
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294       system-config-selinux is a GUI tool available to customize SELinux pol‐
295       icy settings.
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AUTHOR

299       This manual page was auto-generated using sepolicy manpage .
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