postfix_smtp_selinux(8)

1postfix_smtp_selinux(8)   SELinux Policy postfix_smtp  postfix_smtp_selinux(8)
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NAME

6       postfix_smtp_selinux  -  Security  Enhanced  Linux Policy for the post‐
7       fix_smtp processes
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DESCRIPTION

10       Security-Enhanced Linux secures the postfix_smtp processes via flexible
11       mandatory access control.
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13       The  postfix_smtp  processes  execute  with  the postfix_smtp_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_smtp_t
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ENTRYPOINTS

24       The   postfix_smtp_t   SELinux  type  can  be  entered  via  the  post‐
25       fix_smtp_exec_t file type.
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27       The default entrypoint paths for the postfix_smtp_t domain are the fol‐
28       lowing:
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30       /usr/libexec/postfix/lmtp,                   /usr/libexec/postfix/smtp,
31       /usr/libexec/postfix/scache
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PROCESS TYPES

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

54       SELinux policy is customizable based on least access  required.   post‐
55       fix_smtp  policy  is  extremely  flexible and has several booleans that
56       allow you to manipulate the policy and run postfix_smtp with the tight‐
57       est access possible.
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61       If you want to allow all domains to use other domains file descriptors,
62       you must turn on the allow_domain_fd_use boolean. Enabled by default.
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64       setsebool -P allow_domain_fd_use 1
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68       If you want to allow confined applications to run  with  kerberos,  you
69       must turn on the allow_kerberos boolean. Enabled by default.
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71       setsebool -P allow_kerberos 1
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75       If  you want to allow sysadm to debug or ptrace all processes, you must
76       turn on the allow_ptrace boolean. Disabled by default.
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78       setsebool -P allow_ptrace 1
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82       If you want to allow system to run with  NIS,  you  must  turn  on  the
83       allow_ypbind boolean. Disabled by default.
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85       setsebool -P allow_ypbind 1
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89       If  you  want to allow all domains to have the kernel load modules, you
90       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
91       default.
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93       setsebool -P domain_kernel_load_modules 1
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97       If you want to allow all domains to execute in fips_mode, you must turn
98       on the fips_mode boolean. Enabled by default.
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100       setsebool -P fips_mode 1
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104       If you want to enable reading of urandom for all domains, you must turn
105       on the global_ssp boolean. Disabled by default.
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107       setsebool -P global_ssp 1
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111       If  you  want to allow confined applications to use nscd shared memory,
112       you must turn on the nscd_use_shm boolean. Enabled by default.
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114       setsebool -P nscd_use_shm 1
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MANAGED FILES

119       The SELinux process type postfix_smtp_t can manage files  labeled  with
120       the  following  file types.  The paths listed are the default paths for
121       these file types.  Note the processes UID still need to have  DAC  per‐
122       missions.
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124       anon_inodefs_t
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127       initrc_tmp_t
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129
130       mnt_t
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132            /mnt(/[^/]*)
133            /mnt(/[^/]*)?
134            /rhev(/[^/]*)?
135            /media(/[^/]*)
136            /media(/[^/]*)?
137            /etc/rhgb(/.*)?
138            /media/.hal-.*
139            /net
140            /afs
141            /rhev
142            /misc
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144       postfix_prng_t
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146            /etc/postfix/prng_exch
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148       postfix_smtp_tmp_t
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151       postfix_spool_maildrop_t
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153            /var/spool/postfix/defer(/.*)?
154            /var/spool/postfix/deferred(/.*)?
155            /var/spool/postfix/maildrop(/.*)?
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157       postfix_spool_t
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159            /var/spool/postfix.*
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161       postfix_var_run_t
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163            /var/spool/postfix/pid/.*
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165       tmp_t
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167            /tmp
168            /usr/tmp
169            /var/tmp
170            /tmp-inst
171            /var/tmp-inst
172            /var/tmp/vi.recover
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174

FILE CONTEXTS

176       SELinux requires files to have an extended attribute to define the file
177       type.
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179       You can see the context of a file using the -Z option to ls
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181       Policy governs the access  confined  processes  have  to  these  files.
182       SELinux  postfix_smtp  policy  is very flexible allowing users to setup
183       their postfix_smtp processes in as secure a method as possible.
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185       STANDARD FILE CONTEXT
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187       SELinux defines the file context types for  the  postfix_smtp,  if  you
188       wanted  to store files with these types in a diffent paths, you need to
189       execute the semanage command to sepecify alternate  labeling  and  then
190       use restorecon to put the labels on disk.
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192       semanage  fcontext  -a -t postfix_smtpd_tmp_t '/srv/mypostfix_smtp_con‐
193       tent(/.*)?'
194       restorecon -R -v /srv/mypostfix_smtp_content
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196       Note: SELinux often uses regular expressions  to  specify  labels  that
197       match multiple files.
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199       The following file types are defined for postfix_smtp:
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203       postfix_smtp_exec_t
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205       -  Set  files with the postfix_smtp_exec_t type, if you want to transi‐
206       tion an executable to the postfix_smtp_t domain.
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209       Paths:
210            /usr/libexec/postfix/lmtp,              /usr/libexec/postfix/smtp,
211            /usr/libexec/postfix/scache
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214       postfix_smtp_tmp_t
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216       -  Set  files  with  the  postfix_smtp_tmp_t type, if you want to store
217       postfix smtp temporary files in the /tmp directories.
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221       postfix_smtpd_exec_t
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223       - Set files with the postfix_smtpd_exec_t type, if you want to  transi‐
224       tion an executable to the postfix_smtpd_t domain.
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228       postfix_smtpd_tmp_t
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230       -  Set  files  with  the postfix_smtpd_tmp_t type, if you want to store
231       postfix smtpd temporary files in the /tmp directories.
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235       Note: File context can be temporarily modified with the chcon  command.
236       If  you want to permanently change the file context you need to use the
237       semanage fcontext command.  This will modify the SELinux labeling data‐
238       base.  You will need to use restorecon to apply the labels.
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COMMANDS

242       semanage  fcontext  can also be used to manipulate default file context
243       mappings.
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245       semanage permissive can also be used to manipulate  whether  or  not  a
246       process type is permissive.
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248       semanage  module can also be used to enable/disable/install/remove pol‐
249       icy modules.
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251       semanage boolean can also be used to manipulate the booleans
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254       system-config-selinux is a GUI tool available to customize SELinux pol‐
255       icy settings.
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AUTHOR

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