postfix_local_selinux(8)

1postfix_local_selinux(8) SELinux Policy postfix_local postfix_local_selinux(8)
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NAME

6       postfix_local_selinux  -  Security  Enhanced Linux Policy for the post‐
7       fix_local processes
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DESCRIPTION

10       Security-Enhanced Linux secures the postfix_local processes via  flexi‐
11       ble mandatory access control.
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13       The  postfix_local  processes  execute with the postfix_local_t SELinux
14       type. You can check if you have these processes  running  by  executing
15       the ps command with the -Z qualifier.
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17       For example:
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19       ps -eZ | grep postfix_local_t
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ENTRYPOINTS

24       The   postfix_local_t  SELinux  type  can  be  entered  via  the  post‐
25       fix_local_exec_t file type.
26
27       The default entrypoint paths for the  postfix_local_t  domain  are  the
28       following:
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30       /usr/libexec/postfix/local
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PROCESS TYPES

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       postfix_local  policy  is  very  flexible allowing users to setup their
40       postfix_local processes in as secure a method as possible.
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42       The following process types are defined for postfix_local:
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44       postfix_local_t
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46       Note: semanage permissive -a postfix_local_t can be used  to  make  the
47       process  type  postfix_local_t permissive. SELinux does not deny access
48       to permissive process types, but the AVC (SELinux denials) messages are
49       still generated.
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BOOLEANS

53       SELinux  policy  is customizable based on least access required.  post‐
54       fix_local policy is extremely flexible and has  several  booleans  that
55       allow  you  to  manipulate  the  policy  and run postfix_local with the
56       tightest access possible.
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60       If you want to allow all domains to use other domains file descriptors,
61       you must turn on the allow_domain_fd_use boolean. Enabled by default.
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63       setsebool -P allow_domain_fd_use 1
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67       If  you  want  to allow confined applications to run with kerberos, you
68       must turn on the allow_kerberos boolean. Enabled by default.
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70       setsebool -P allow_kerberos 1
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74       If you  want  to  allow  postfix_local  domain  full  write  access  to
75       mail_spool    directories,   you   must   turn   on   the   allow_post‐
76       fix_local_write_mail_spool boolean. Enabled by default.
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78       setsebool -P allow_postfix_local_write_mail_spool 1
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82       If you want to allow sysadm to debug or ptrace all processes, you  must
83       turn on the allow_ptrace boolean. Disabled by default.
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85       setsebool -P allow_ptrace 1
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89       If  you  want  to  allow  system  to run with NIS, you must turn on the
90       allow_ypbind boolean. Disabled by default.
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92       setsebool -P allow_ypbind 1
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96       If you want to allow all domains to have the kernel load  modules,  you
97       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
98       default.
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100       setsebool -P domain_kernel_load_modules 1
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104       If you want to allow all domains to execute in fips_mode, you must turn
105       on the fips_mode boolean. Enabled by default.
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107       setsebool -P fips_mode 1
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111       If you want to enable reading of urandom for all domains, you must turn
112       on the global_ssp boolean. Disabled by default.
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114       setsebool -P global_ssp 1
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118       If you want to allow confined applications to use nscd  shared  memory,
119       you must turn on the nscd_use_shm boolean. Enabled by default.
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121       setsebool -P nscd_use_shm 1
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124
125       If  you  want  to  support  NFS  home directories, you must turn on the
126       use_nfs_home_dirs boolean. Disabled by default.
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128       setsebool -P use_nfs_home_dirs 1
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132       If you want to support SAMBA home directories, you  must  turn  on  the
133       use_samba_home_dirs boolean. Disabled by default.
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135       setsebool -P use_samba_home_dirs 1
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MANAGED FILES

140       The  SELinux process type postfix_local_t can manage files labeled with
141       the following file types.  The paths listed are the default  paths  for
142       these  file  types.  Note the processes UID still need to have DAC per‐
143       missions.
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145       anon_inodefs_t
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148       cifs_t
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151       dovecot_spool_t
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153            /var/spool/dovecot(/.*)?
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155       initrc_tmp_t
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158       mail_home_rw_t
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160            /root/Maildir(/.*)?
161            /home/[^/]*/Maildir(/.*)?
162            /home/staff/Maildir(/.*)?
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164       mail_spool_t
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166            /var/mail(/.*)?
167            /var/spool/mail(/.*)?
168            /var/spool/imap(/.*)?
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170       mailman_data_t
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172            /etc/mailman(/.*)?
173            /var/lib/mailman(/.*)?
174            /var/spool/mailman(/.*)?
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176       mnt_t
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178            /mnt(/[^/]*)
179            /mnt(/[^/]*)?
180            /rhev(/[^/]*)?
181            /media(/[^/]*)
182            /media(/[^/]*)?
183            /etc/rhgb(/.*)?
184            /media/.hal-.*
185            /net
186            /afs
187            /rhev
188            /misc
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190       nfs_t
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193       postfix_local_tmp_t
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196       postfix_spool_maildrop_t
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198            /var/spool/postfix/defer(/.*)?
199            /var/spool/postfix/deferred(/.*)?
200            /var/spool/postfix/maildrop(/.*)?
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202       postfix_spool_t
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204            /var/spool/postfix.*
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206       postfix_var_run_t
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208            /var/spool/postfix/pid/.*
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210       tmp_t
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212            /tmp
213            /usr/tmp
214            /var/tmp
215            /tmp-inst
216            /var/tmp-inst
217            /var/tmp/vi.recover
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219       user_home_t
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221            /home/[^/]*/.+
222            /home/staff/.+
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FILE CONTEXTS

226       SELinux requires files to have an extended attribute to define the file
227       type.
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229       You can see the context of a file using the -Z option to ls
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231       Policy  governs  the  access  confined  processes  have to these files.
232       SELinux postfix_local policy is very flexible allowing users  to  setup
233       their postfix_local processes in as secure a method as possible.
234
235       STANDARD FILE CONTEXT
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237       SELinux  defines  the  file context types for the postfix_local, if you
238       wanted to store files with these types in a diffent paths, you need  to
239       execute  the  semanage  command to sepecify alternate labeling and then
240       use restorecon to put the labels on disk.
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242       semanage fcontext -a -t postfix_local_tmp_t  '/srv/mypostfix_local_con‐
243       tent(/.*)?'
244       restorecon -R -v /srv/mypostfix_local_content
245
246       Note:  SELinux  often  uses  regular expressions to specify labels that
247       match multiple files.
248
249       The following file types are defined for postfix_local:
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253       postfix_local_exec_t
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255       - Set files with the postfix_local_exec_t type, if you want to  transi‐
256       tion an executable to the postfix_local_t domain.
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260       postfix_local_tmp_t
261
262       -  Set  files  with  the postfix_local_tmp_t type, if you want to store
263       postfix local temporary files in the /tmp directories.
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267       Note: File context can be temporarily modified with the chcon  command.
268       If  you want to permanently change the file context you need to use the
269       semanage fcontext command.  This will modify the SELinux labeling data‐
270       base.  You will need to use restorecon to apply the labels.
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COMMANDS

274       semanage  fcontext  can also be used to manipulate default file context
275       mappings.
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277       semanage permissive can also be used to manipulate  whether  or  not  a
278       process type is permissive.
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280       semanage  module can also be used to enable/disable/install/remove pol‐
281       icy modules.
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283       semanage boolean can also be used to manipulate the booleans
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285
286       system-config-selinux is a GUI tool available to customize SELinux pol‐
287       icy settings.
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AUTHOR

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