exim_selinux(8)

1exim_selinux(8)               SELinux Policy exim              exim_selinux(8)
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NAME

6       exim_selinux - Security Enhanced Linux Policy for the exim processes
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DESCRIPTION

9       Security-Enhanced  Linux secures the exim processes via flexible manda‐
10       tory access control.
11
12       The exim processes execute with the exim_t SELinux type. You can  check
13       if  you  have  these processes running by executing the ps command with
14       the -Z qualifier.
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16       For example:
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18       ps -eZ | grep exim_t
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ENTRYPOINTS

23       The exim_t SELinux type can be entered via the exim_exec_t file type.
24
25       The default entrypoint paths for the exim_t domain are the following:
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27       /usr/sbin/exim[0-9]?
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PROCESS TYPES

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

BOOLEANS

50       SELinux policy is customizable based on least  access  required.   exim
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run exim with the tightest access possible.
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55
56       If you want to allow exim to connect to  databases  (postgres,  mysql),
57       you must turn on the exim_can_connect_db boolean. Disabled by default.
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59       setsebool -P exim_can_connect_db 1
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63       If  you  want to allow exim to create, read, write, and delete unprivi‐
64       leged user files, you must turn on the exim_manage_user_files  boolean.
65       Disabled by default.
66
67       setsebool -P exim_manage_user_files 1
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71       If  you  want  to  allow exim to read unprivileged user files, you must
72       turn on the exim_read_user_files boolean. Disabled by default.
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74       setsebool -P exim_read_user_files 1
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78       If you want to allow all daemons to write corefiles to /, you must turn
79       on the allow_daemons_dump_core boolean. Disabled by default.
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81       setsebool -P allow_daemons_dump_core 1
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84
85       If  you want to allow all daemons to use tcp wrappers, you must turn on
86       the allow_daemons_use_tcp_wrapper boolean. Disabled by default.
87
88       setsebool -P allow_daemons_use_tcp_wrapper 1
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91
92       If you want to allow all daemons the ability to  read/write  terminals,
93       you  must  turn  on  the  allow_daemons_use_tty  boolean.  Disabled  by
94       default.
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96       setsebool -P allow_daemons_use_tty 1
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100       If you want to allow all domains to use other domains file descriptors,
101       you must turn on the allow_domain_fd_use boolean. Enabled by default.
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103       setsebool -P allow_domain_fd_use 1
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106
107       If  you  want  to allow confined applications to run with kerberos, you
108       must turn on the allow_kerberos boolean. Enabled by default.
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110       setsebool -P allow_kerberos 1
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113
114       If you want to allow sysadm to debug or ptrace all processes, you  must
115       turn on the allow_ptrace boolean. Disabled by default.
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117       setsebool -P allow_ptrace 1
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120
121       If  you  want  to  allow  system  to run with NIS, you must turn on the
122       allow_ypbind boolean. Disabled by default.
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124       setsebool -P allow_ypbind 1
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127
128       If you want to enable cluster mode for daemons, you must  turn  on  the
129       daemons_enable_cluster_mode boolean. Disabled by default.
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131       setsebool -P daemons_enable_cluster_mode 1
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135       If  you  want to allow all domains to have the kernel load modules, you
136       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
137       default.
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139       setsebool -P domain_kernel_load_modules 1
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142
143       If you want to allow all domains to execute in fips_mode, you must turn
144       on the fips_mode boolean. Enabled by default.
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146       setsebool -P fips_mode 1
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149
150       If you want to enable reading of urandom for all domains, you must turn
151       on the global_ssp boolean. Disabled by default.
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153       setsebool -P global_ssp 1
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156
157       If  you  want  to  allow http daemon to send mail, you must turn on the
158       httpd_can_sendmail boolean. Disabled by default.
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160       setsebool -P httpd_can_sendmail 1
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163
164       If you want to enable support for upstart as the init program, you must
165       turn on the init_upstart boolean. Enabled by default.
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167       setsebool -P init_upstart 1
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171       If  you  want to allow confined applications to use nscd shared memory,
172       you must turn on the nscd_use_shm boolean. Enabled by default.
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174       setsebool -P nscd_use_shm 1
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177
178       If you want to support NFS home  directories,  you  must  turn  on  the
179       use_nfs_home_dirs boolean. Disabled by default.
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181       setsebool -P use_nfs_home_dirs 1
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185       If  you  want  to  support SAMBA home directories, you must turn on the
186       use_samba_home_dirs boolean. Disabled by default.
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188       setsebool -P use_samba_home_dirs 1
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MANAGED FILES

193       The SELinux process type exim_t can manage files labeled with the  fol‐
194       lowing  file  types.   The paths listed are the default paths for these
195       file types.  Note the processes UID still need to have DAC permissions.
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197       arpwatch_tmp_t
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199
200       cifs_t
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202
203       cluster_conf_t
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205            /etc/cluster(/.*)?
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207       cluster_var_lib_t
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209            /var/lib(64)?/openais(/.*)?
210            /var/lib(64)?/pengine(/.*)?
211            /var/lib(64)?/corosync(/.*)?
212            /usr/lib(64)?/heartbeat(/.*)?
213            /var/lib(64)?/heartbeat(/.*)?
214            /var/lib(64)?/pacemaker(/.*)?
215            /var/lib/cluster(/.*)?
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217       cluster_var_run_t
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219            /var/run/crm(/.*)?
220            /var/run/cman_.*
221            /var/run/rsctmp(/.*)?
222            /var/run/aisexec.*
223            /var/run/heartbeat(/.*)?
224            /var/run/cpglockd.pid
225            /var/run/corosync.pid
226            /var/run/rgmanager.pid
227            /var/run/cluster/rgmanager.sk
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229       dovecot_spool_t
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231            /var/spool/dovecot(/.*)?
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233       exim_log_t
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235            /var/log/exim[0-9]?(/.*)?
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237       exim_spool_t
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239            /var/spool/exim[0-9]?(/.*)?
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241       exim_tmp_t
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244       exim_var_run_t
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246            /var/run/exim[0-9]?.pid
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248       initrc_tmp_t
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250
251       mail_home_rw_t
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253            /root/Maildir(/.*)?
254            /home/[^/]*/Maildir(/.*)?
255            /home/staff/Maildir(/.*)?
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257       mail_spool_t
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259            /var/mail(/.*)?
260            /var/spool/mail(/.*)?
261            /var/spool/imap(/.*)?
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263       mnt_t
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265            /mnt(/[^/]*)
266            /mnt(/[^/]*)?
267            /rhev(/[^/]*)?
268            /media(/[^/]*)
269            /media(/[^/]*)?
270            /etc/rhgb(/.*)?
271            /media/.hal-.*
272            /net
273            /afs
274            /rhev
275            /misc
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277       nfs_t
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280       root_t
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282            /
283            /initrd
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285       sendmail_tmp_t
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288       tmp_t
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290            /tmp
291            /usr/tmp
292            /var/tmp
293            /tmp-inst
294            /var/tmp-inst
295            /var/tmp/vi.recover
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297       user_home_t
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299            /home/[^/]*/.+
300            /home/staff/.+
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302       user_tmp_t
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304            /tmp/gconfd-.*
305            /tmp/gconfd-staff
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FILE CONTEXTS

309       SELinux requires files to have an extended attribute to define the file
310       type.
311
312       You can see the context of a file using the -Z option to ls
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314       Policy  governs  the  access  confined  processes  have to these files.
315       SELinux exim policy is very flexible allowing users to setup their exim
316       processes in as secure a method as possible.
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318       STANDARD FILE CONTEXT
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320       SELinux  defines  the file context types for the exim, if you wanted to
321       store files with these types in a diffent paths, you  need  to  execute
322       the  semanage  command  to  sepecify  alternate  labeling  and then use
323       restorecon to put the labels on disk.
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325       semanage fcontext -a -t exim_var_run_t '/srv/myexim_content(/.*)?'
326       restorecon -R -v /srv/myexim_content
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328       Note: SELinux often uses regular expressions  to  specify  labels  that
329       match multiple files.
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331       The following file types are defined for exim:
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335       exim_exec_t
336
337       -  Set  files  with  the exim_exec_t type, if you want to transition an
338       executable to the exim_t domain.
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342       exim_initrc_exec_t
343
344       - Set files with the exim_initrc_exec_t type, if you want to transition
345       an executable to the exim_initrc_t domain.
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349       exim_keytab_t
350
351       - Set files with the exim_keytab_t type, if you want to treat the files
352       as kerberos keytab files.
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356       exim_log_t
357
358       - Set files with the exim_log_t type, if you want to treat the data  as
359       exim log data, usually stored under the /var/log directory.
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363       exim_spool_t
364
365       -  Set  files with the exim_spool_t type, if you want to store the exim
366       files under the /var/spool directory.
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370       exim_tmp_t
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372       - Set files with the exim_tmp_t type, if you want to store exim  tempo‐
373       rary files in the /tmp directories.
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377       exim_var_run_t
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379       - Set files with the exim_var_run_t type, if you want to store the exim
380       files under the /run or /var/run directory.
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384       Note: File context can be temporarily modified with the chcon  command.
385       If  you want to permanently change the file context you need to use the
386       semanage fcontext command.  This will modify the SELinux labeling data‐
387       base.  You will need to use restorecon to apply the labels.
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COMMANDS

391       semanage  fcontext  can also be used to manipulate default file context
392       mappings.
393
394       semanage permissive can also be used to manipulate  whether  or  not  a
395       process type is permissive.
396
397       semanage  module can also be used to enable/disable/install/remove pol‐
398       icy modules.
399
400       semanage boolean can also be used to manipulate the booleans
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402
403       system-config-selinux is a GUI tool available to customize SELinux pol‐
404       icy settings.
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AUTHOR

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