postfix_smtpd_selinux(8)

1postfix_smtpd_selinux(8) SELinux Policy postfix_smtpd postfix_smtpd_selinux(8)
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NAME

6       postfix_smtpd_selinux  -  Security  Enhanced Linux Policy for the post‐
7       fix_smtpd processes
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DESCRIPTION

10       Security-Enhanced Linux secures the postfix_smtpd processes via  flexi‐
11       ble mandatory access control.
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13       The  postfix_smtpd  processes  execute with the postfix_smtpd_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_smtpd_t
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ENTRYPOINTS

24       The   postfix_smtpd_t  SELinux  type  can  be  entered  via  the  post‐
25       fix_smtpd_exec_t file type.
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27       The default entrypoint paths for the  postfix_smtpd_t  domain  are  the
28       following:
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30       /usr/libexec/postfix/smtpd
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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_smtpd  policy  is  very  flexible allowing users to setup their
40       postfix_smtpd processes in as secure a method as possible.
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42       The following process types are defined for postfix_smtpd:
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44       postfix_smtp_t, postfix_smtpd_t
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46       Note: semanage permissive -a postfix_smtpd_t can be used  to  make  the
47       process  type  postfix_smtpd_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_smtpd policy is extremely flexible and has  several  booleans  that
55       allow  you  to  manipulate  the  policy  and run postfix_smtpd with the
56       tightest access possible.
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60       If you want to allow all domains to execute in fips_mode, you must turn
61       on the fips_mode boolean. Enabled by default.
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63       setsebool -P fips_mode 1
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67       If  you  want  to  allow  system  to run with NIS, you must turn on the
68       nis_enabled boolean. Disabled by default.
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70       setsebool -P nis_enabled 1
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MANAGED FILES

75       The SELinux process type postfix_smtpd_t can manage files labeled  with
76       the  following  file types.  The paths listed are the default paths for
77       these file types.  Note the processes UID still need to have  DAC  per‐
78       missions.
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80       krb5_host_rcache_t
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82            /var/tmp/krb5_0.rcache2
83            /var/cache/krb5rcache(/.*)?
84            /var/tmp/nfs_0
85            /var/tmp/DNS_25
86            /var/tmp/host_0
87            /var/tmp/imap_0
88            /var/tmp/HTTP_23
89            /var/tmp/HTTP_48
90            /var/tmp/ldap_55
91            /var/tmp/ldap_487
92            /var/tmp/ldapmap1_0
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94       postfix_prng_t
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96            /etc/postfix/prng_exch
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98       postfix_smtpd_tmp_t
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101       postfix_spool_t
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103            /var/spool/postfix.*
104            /var/spool/postfix/defer(/.*)?
105            /var/spool/postfix/flush(/.*)?
106            /var/spool/postfix/deferred(/.*)?
107            /var/spool/postfix/maildrop(/.*)?
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109       postfix_var_run_t
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111            /var/spool/postfix/pid/.*
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FILE CONTEXTS

115       SELinux requires files to have an extended attribute to define the file
116       type.
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118       You can see the context of a file using the -Z option to ls
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120       Policy governs the access  confined  processes  have  to  these  files.
121       SELinux  postfix_smtpd  policy is very flexible allowing users to setup
122       their postfix_smtpd processes in as secure a method as possible.
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124       STANDARD FILE CONTEXT
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126       SELinux defines the file context types for the  postfix_smtpd,  if  you
127       wanted  to store files with these types in a diffent paths, you need to
128       execute the semanage command to sepecify alternate  labeling  and  then
129       use restorecon to put the labels on disk.
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131       semanage  fcontext -a -t postfix_smtpd_tmp_t '/srv/mypostfix_smtpd_con‐
132       tent(/.*)?'
133       restorecon -R -v /srv/mypostfix_smtpd_content
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135       Note: SELinux often uses regular expressions  to  specify  labels  that
136       match multiple files.
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138       The following file types are defined for postfix_smtpd:
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142       postfix_smtpd_exec_t
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144       -  Set files with the postfix_smtpd_exec_t type, if you want to transi‐
145       tion an executable to the postfix_smtpd_t domain.
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149       postfix_smtpd_tmp_t
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151       - Set files with the postfix_smtpd_tmp_t type, if  you  want  to  store
152       postfix smtpd temporary files in the /tmp directories.
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156       Note:  File context can be temporarily modified with the chcon command.
157       If you want to permanently change the file context you need to use  the
158       semanage fcontext command.  This will modify the SELinux labeling data‐
159       base.  You will need to use restorecon to apply the labels.
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COMMANDS

163       semanage fcontext can also be used to manipulate default  file  context
164       mappings.
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166       semanage  permissive  can  also  be used to manipulate whether or not a
167       process type is permissive.
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169       semanage module can also be used to enable/disable/install/remove  pol‐
170       icy modules.
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172       semanage boolean can also be used to manipulate the booleans
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175       system-config-selinux is a GUI tool available to customize SELinux pol‐
176       icy settings.
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AUTHOR

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