1postfix_qmgr_selinux(8) SELinux Policy postfix_qmgr postfix_qmgr_selinux(8)
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6 postfix_qmgr_selinux - Security Enhanced Linux Policy for the post‐
7 fix_qmgr processes
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10 Security-Enhanced Linux secures the postfix_qmgr processes via flexible
11 mandatory access control.
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13 The postfix_qmgr processes execute with the postfix_qmgr_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_qmgr_t
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24 The postfix_qmgr_t SELinux type can be entered via the post‐
25 fix_qmgr_exec_t file type.
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27 The default entrypoint paths for the postfix_qmgr_t domain are the fol‐
28 lowing:
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30 /usr/libexec/postfix/(n)?qmgr
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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_qmgr policy is very flexible allowing users to setup their
40 postfix_qmgr processes in as secure a method as possible.
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42 The following process types are defined for postfix_qmgr:
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44 postfix_qmgr_t
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46 Note: semanage permissive -a postfix_qmgr_t can be used to make the
47 process type postfix_qmgr_t permissive. SELinux does not deny access to
48 permissive process types, but the AVC (SELinux denials) messages are
49 still generated.
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53 SELinux policy is customizable based on least access required. post‐
54 fix_qmgr policy is extremely flexible and has several booleans that al‐
55 low you to manipulate the policy and run postfix_qmgr with the tightest
56 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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75 The SELinux process type postfix_qmgr_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_qmgr_tmp_t
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97 postfix_spool_t
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99 /var/spool/postfix.*
100 /var/spool/postfix/defer(/.*)?
101 /var/spool/postfix/flush(/.*)?
102 /var/spool/postfix/deferred(/.*)?
103 /var/spool/postfix/maildrop(/.*)?
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105 postfix_var_run_t
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107 /var/spool/postfix/pid/.*
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111 SELinux requires files to have an extended attribute to define the file
112 type.
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114 You can see the context of a file using the -Z option to ls
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116 Policy governs the access confined processes have to these files.
117 SELinux postfix_qmgr policy is very flexible allowing users to setup
118 their postfix_qmgr processes in as secure a method as possible.
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120 STANDARD FILE CONTEXT
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122 SELinux defines the file context types for the postfix_qmgr, if you
123 wanted to store files with these types in a diffent paths, you need to
124 execute the semanage command to specify alternate labeling and then use
125 restorecon to put the labels on disk.
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127 semanage fcontext -a -t postfix_qmgr_tmp_t '/srv/mypostfix_qmgr_con‐
128 tent(/.*)?'
129 restorecon -R -v /srv/mypostfix_qmgr_content
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131 Note: SELinux often uses regular expressions to specify labels that
132 match multiple files.
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134 The following file types are defined for postfix_qmgr:
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138 postfix_qmgr_exec_t
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140 - Set files with the postfix_qmgr_exec_t type, if you want to transi‐
141 tion an executable to the postfix_qmgr_t domain.
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145 postfix_qmgr_tmp_t
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147 - Set files with the postfix_qmgr_tmp_t type, if you want to store
148 postfix qmgr temporary files in the /tmp directories.
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152 Note: File context can be temporarily modified with the chcon command.
153 If you want to permanently change the file context you need to use the
154 semanage fcontext command. This will modify the SELinux labeling data‐
155 base. You will need to use restorecon to apply the labels.
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159 semanage fcontext can also be used to manipulate default file context
160 mappings.
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162 semanage permissive can also be used to manipulate whether or not a
163 process type is permissive.
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165 semanage module can also be used to enable/disable/install/remove pol‐
166 icy modules.
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168 semanage boolean can also be used to manipulate the booleans
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171 system-config-selinux is a GUI tool available to customize SELinux pol‐
172 icy settings.
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176 This manual page was auto-generated using sepolicy manpage .
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180 selinux(8), postfix_qmgr(8), semanage(8), restorecon(8), chcon(1), se‐
181 policy(8), setsebool(8)
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185postfix_qmgr 23-02-03 postfix_qmgr_selinux(8)