1postfix_postdrop_selinux(S8E)Linux Policy postfix_postdproosptfix_postdrop_selinux(8)
2
6 postfix_postdrop_selinux - Security Enhanced Linux Policy for the post‐
7 fix_postdrop processes
8
10 Security-Enhanced Linux secures the postfix_postdrop processes via
11 flexible mandatory access control.
12 The postfix_postdrop processes execute with the postfix_postdrop_t
14 SELinux type. You can check if you have these processes running by exe‐
15 cuting the ps command with the -Z qualifier.
16 For example:
18 ps -eZ | grep postfix_postdrop_t
20
24 The postfix_postdrop_t SELinux type can be entered via the post‐
25 fix_postdrop_exec_t file type.
26 The default entrypoint paths for the postfix_postdrop_t domain are the
28 following:
29 /usr/sbin/postdrop
31
33 SELinux defines process types (domains) for each process running on the
34 system
35 You can see the context of a process using the -Z option to ps
37 Policy governs the access confined processes have to files. SELinux
39 postfix_postdrop policy is very flexible allowing users to setup their
40 postfix_postdrop processes in as secure a method as possible.
41 The following process types are defined for postfix_postdrop:
43 postfix_postdrop_t
45 Note: semanage permissive -a postfix_postdrop_t can be used to make the
47 process type postfix_postdrop_t permissive. SELinux does not deny
48 access to permissive process types, but the AVC (SELinux denials) mes‐
49 sages are still generated.
50
53 SELinux policy is customizable based on least access required. post‐
54 fix_postdrop policy is extremely flexible and has several booleans that
55 allow you to manipulate the policy and run postfix_postdrop with the
56 tightest access possible.
57 If you want to allow users to resolve user passwd entries directly from
61 ldap rather then using a sssd server, you must turn on the authlo‐
62 gin_nsswitch_use_ldap boolean. Disabled by default.
63 setsebool -P authlogin_nsswitch_use_ldap 1
65 If you want to allow all domains to execute in fips_mode, you must turn
69 on the fips_mode boolean. Enabled by default.
70 setsebool -P fips_mode 1
72 If you want to allow confined applications to run with kerberos, you
76 must turn on the kerberos_enabled boolean. Enabled by default.
77 setsebool -P kerberos_enabled 1
79 If you want to allow system to run with NIS, you must turn on the
83 nis_enabled boolean. Disabled by default.
84 setsebool -P nis_enabled 1
86 If you want to allow confined applications to use nscd shared memory,
90 you must turn on the nscd_use_shm boolean. Disabled by default.
91 setsebool -P nscd_use_shm 1
93
97 The SELinux process type postfix_postdrop_t can manage files labeled
98 with the following file types. The paths listed are the default paths
99 for these file types. Note the processes UID still need to have DAC
100 permissions.
101 anon_inodefs_t
103 arpwatch_tmp_t
106 postfix_spool_t
109 /var/spool/postfix.*
111 /var/spool/postfix/defer(/.*)?
112 /var/spool/postfix/flush(/.*)?
113 /var/spool/postfix/deferred(/.*)?
114 /var/spool/postfix/maildrop(/.*)?
115 postfix_var_run_t
117 /var/spool/postfix/pid/.*
119 uucpd_spool_t
121 /var/spool/uucp(/.*)?
123 /var/spool/uucppublic(/.*)?
124
127 SELinux requires files to have an extended attribute to define the file
128 type.
129 You can see the context of a file using the -Z option to ls
131 Policy governs the access confined processes have to these files.
133 SELinux postfix_postdrop policy is very flexible allowing users to set‐
134 up their postfix_postdrop processes in as secure a method as possible.
135 STANDARD FILE CONTEXT
137 SELinux defines the file context types for the postfix_postdrop, if you
139 wanted to store files with these types in a diffent paths, you need to
140 execute the semanage command to sepecify alternate labeling and then
141 use restorecon to put the labels on disk.
142 semanage fcontext -a -t postfix_postdrop_t '/srv/mypostfix_post‐
144 drop_content(/.*)?'
145 restorecon -R -v /srv/mypostfix_postdrop_content
146 Note: SELinux often uses regular expressions to specify labels that
148 match multiple files.
149 The following file types are defined for postfix_postdrop:
151 postfix_postdrop_exec_t
155 - Set files with the postfix_postdrop_exec_t type, if you want to tran‐
157 sition an executable to the postfix_postdrop_t domain.
158 postfix_postdrop_t
162 - Set files with the postfix_postdrop_t type, if you want to treat the
164 files as postfix postdrop data.
165 Note: File context can be temporarily modified with the chcon command.
169 If you want to permanently change the file context you need to use the
170 semanage fcontext command. This will modify the SELinux labeling data‐
171 base. You will need to use restorecon to apply the labels.
172
175 semanage fcontext can also be used to manipulate default file context
176 mappings.
177 semanage permissive can also be used to manipulate whether or not a
179 process type is permissive.
180 semanage module can also be used to enable/disable/install/remove pol‐
182 icy modules.
183 semanage boolean can also be used to manipulate the booleans
185 system-config-selinux is a GUI tool available to customize SELinux pol‐
188 icy settings.
189
192 This manual page was auto-generated using sepolicy manpage .
193
196 selinux(8), postfix_postdrop(8), semanage(8), restorecon(8), chcon(1),
197 sepolicy(8), setsebool(8)
198postfix_postdrop 19-05-30 postfix_postdrop_selinux(8)