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.
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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 file types.
26
27       The default entrypoint paths for the sendmail_t domain are the  follow‐
28       ing:
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30       /usr/lib(64)?/sendmail,  /bin/mail(x)?, /usr/sbin/sendmail(.sendmail)?,
31       /usr/bin/esmtp, /usr/sbin/ssmtp, /usr/sbin/rmail,  /var/qmail/bin/send‐
32       mail, /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:
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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 all daemons the ability to  read/write  terminals,
63       you  must  turn  on  the  allow_daemons_use_tty  boolean.  Disabled  by
64       default.
65
66       setsebool -P allow_daemons_use_tty 1
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70       If you want to allow all domains to use other domains file descriptors,
71       you must turn on the allow_domain_fd_use boolean. Enabled by default.
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73       setsebool -P allow_domain_fd_use 1
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77       If  you  want  to allow confined applications to run with kerberos, you
78       must turn on the allow_kerberos boolean. Enabled by default.
79
80       setsebool -P allow_kerberos 1
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83
84       If you want to allow sysadm to debug or ptrace all processes, you  must
85       turn on the allow_ptrace boolean. Disabled by default.
86
87       setsebool -P allow_ptrace 1
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90
91       If  you  want  to  allow  system  to run with NIS, you must turn on the
92       allow_ypbind boolean. Disabled by default.
93
94       setsebool -P allow_ypbind 1
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98       If you want to allow all domains to have the kernel load  modules,  you
99       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
100       default.
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102       setsebool -P domain_kernel_load_modules 1
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105
106       If you want to allow all domains to execute in fips_mode, you must turn
107       on the fips_mode boolean. Enabled by default.
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109       setsebool -P fips_mode 1
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112
113       If you want to enable reading of urandom for all domains, you must turn
114       on the global_ssp boolean. Disabled by default.
115
116       setsebool -P global_ssp 1
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118
119
120       If you want to allow confined applications to use nscd  shared  memory,
121       you must turn on the nscd_use_shm boolean. Enabled by default.
122
123       setsebool -P nscd_use_shm 1
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126
127       If  you  want  to  support  NFS  home directories, you must turn on the
128       use_nfs_home_dirs boolean. Disabled by default.
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130       setsebool -P use_nfs_home_dirs 1
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134       If you want to support SAMBA home directories, you  must  turn  on  the
135       use_samba_home_dirs boolean. Disabled by default.
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137       setsebool -P use_samba_home_dirs 1
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MANAGED FILES

142       The  SELinux  process type sendmail_t can manage files labeled with the
143       following file types.  The paths listed are the default paths for these
144       file types.  Note the processes UID still need to have DAC permissions.
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146       anon_inodefs_t
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148
149       cifs_t
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151
152       dovecot_spool_t
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154            /var/spool/dovecot(/.*)?
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156       etc_aliases_t
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158            /etc/postfix/aliases.*
159            /etc/aliases
160            /etc/aliases.db
161            /etc/mail/aliases
162            /etc/mail/aliases.db
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164       initrc_tmp_t
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166
167       mail_home_rw_t
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169            /root/Maildir(/.*)?
170            /home/[^/]*/Maildir(/.*)?
171            /home/staff/Maildir(/.*)?
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173       mail_spool_t
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175            /var/mail(/.*)?
176            /var/spool/mail(/.*)?
177            /var/spool/imap(/.*)?
178
179       mnt_t
180
181            /mnt(/[^/]*)
182            /mnt(/[^/]*)?
183            /rhev(/[^/]*)?
184            /media(/[^/]*)
185            /media(/[^/]*)?
186            /etc/rhgb(/.*)?
187            /media/.hal-.*
188            /net
189            /afs
190            /rhev
191            /misc
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193       mqueue_spool_t
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195            /var/spool/(client)?mqueue(/.*)?
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197       nfs_t
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200       procmail_tmp_t
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203       sendmail_log_t
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205            /var/log/mail(/.*)?
206            /var/log/sendmail.st.*
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208       sendmail_tmp_t
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210
211       sendmail_var_run_t
212
213            /var/run/sendmail.pid
214            /var/run/sm-client.pid
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216       tmp_t
217
218            /tmp
219            /usr/tmp
220            /var/tmp
221            /tmp-inst
222            /var/tmp-inst
223            /var/tmp/vi.recover
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225       user_home_t
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227            /home/[^/]*/.+
228            /home/staff/.+
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FILE CONTEXTS

232       SELinux requires files to have an extended attribute to define the file
233       type.
234
235       You can see the context of a file using the -Z option to ls
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237       Policy governs the access  confined  processes  have  to  these  files.
238       SELinux  sendmail policy is very flexible allowing users to setup their
239       sendmail processes in as secure a method as possible.
240
241       STANDARD FILE CONTEXT
242
243       SELinux defines the file context types for the sendmail, if you  wanted
244       to store files with these types in a diffent paths, you need to execute
245       the semanage command  to  sepecify  alternate  labeling  and  then  use
246       restorecon to put the labels on disk.
247
248       semanage   fcontext   -a  -t  sendmail_var_run_t  '/srv/mysendmail_con‐
249       tent(/.*)?'
250       restorecon -R -v /srv/mysendmail_content
251
252       Note: SELinux often uses regular expressions  to  specify  labels  that
253       match multiple files.
254
255       The following file types are defined for sendmail:
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259       sendmail_exec_t
260
261       - Set files with the sendmail_exec_t type, if you want to transition an
262       executable to the sendmail_t domain.
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264
265       Paths:
266            /usr/lib(64)?/sendmail,  /bin/mail(x)?,  /usr/sbin/sendmail(.send‐
267            mail)?,    /usr/bin/esmtp,    /usr/sbin/ssmtp,    /usr/sbin/rmail,
268            /var/qmail/bin/sendmail, /usr/sbin/sendmail.postfix
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270
271       sendmail_initrc_exec_t
272
273       - Set files with the sendmail_initrc_exec_t type, if you want to  tran‐
274       sition an executable to the sendmail_initrc_t domain.
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278       sendmail_keytab_t
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280       -  Set  files with the sendmail_keytab_t type, if you want to treat the
281       files as kerberos keytab files.
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285       sendmail_log_t
286
287       - Set files with the sendmail_log_t type, if you want to treat the data
288       as sendmail log data, usually stored under the /var/log directory.
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290
291       Paths:
292            /var/log/mail(/.*)?, /var/log/sendmail.st.*
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294
295       sendmail_tmp_t
296
297       - Set files with the sendmail_tmp_t type, if you want to store sendmail
298       temporary files in the /tmp directories.
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302       sendmail_var_run_t
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304       - Set files with the sendmail_var_run_t type, if you want to store  the
305       sendmail files under the /run or /var/run directory.
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307
308       Paths:
309            /var/run/sendmail.pid, /var/run/sm-client.pid
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311
312       Note:  File context can be temporarily modified with the chcon command.
313       If you want to permanently change the file context you need to use  the
314       semanage fcontext command.  This will modify the SELinux labeling data‐
315       base.  You will need to use restorecon to apply the labels.
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COMMANDS

319       semanage fcontext can also be used to manipulate default  file  context
320       mappings.
321
322       semanage  permissive  can  also  be used to manipulate whether or not a
323       process type is permissive.
324
325       semanage module can also be used to enable/disable/install/remove  pol‐
326       icy modules.
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328       semanage boolean can also be used to manipulate the booleans
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330
331       system-config-selinux is a GUI tool available to customize SELinux pol‐
332       icy settings.
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AUTHOR

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