1qmail_smtpd_selinux(8) SELinux Policy qmail_smtpd qmail_smtpd_selinux(8)
2
6 qmail_smtpd_selinux - Security Enhanced Linux Policy for the
7 qmail_smtpd processes
8
10 Security-Enhanced Linux secures the qmail_smtpd processes via flexible
11 mandatory access control.
12 The qmail_smtpd processes execute with the qmail_smtpd_t SELinux type.
14 You can check if you have these processes running by executing the ps
15 command with the -Z qualifier.
16 For example:
18 ps -eZ | grep qmail_smtpd_t
20
24 The qmail_smtpd_t SELinux type can be entered via the
25 qmail_smtpd_exec_t file type.
26 The default entrypoint paths for the qmail_smtpd_t domain are the fol‐
28 lowing:
29 /var/qmail/bin/qmail-smtpd
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 qmail_smtpd policy is very flexible allowing users to setup their
40 qmail_smtpd processes in as secure a method as possible.
41 The following process types are defined for qmail_smtpd:
43 qmail_smtpd_t
45 Note: semanage permissive -a qmail_smtpd_t can be used to make the
47 process type qmail_smtpd_t permissive. SELinux does not deny access to
48 permissive process types, but the AVC (SELinux denials) messages are
49 still generated.
50
53 SELinux policy is customizable based on least access required.
54 qmail_smtpd policy is extremely flexible and has several booleans that
55 allow you to manipulate the policy and run qmail_smtpd with the tight‐
56 est access possible.
57 If you want to allow all domains to execute in fips_mode, you must turn
61 on the fips_mode boolean. Enabled by default.
62 setsebool -P fips_mode 1
64 If you want to allow confined applications to run with kerberos, you
68 must turn on the kerberos_enabled boolean. Enabled by default.
69 setsebool -P kerberos_enabled 1
71
75 SELinux requires files to have an extended attribute to define the file
76 type.
77 You can see the context of a file using the -Z option to ls
79 Policy governs the access confined processes have to these files.
81 SELinux qmail_smtpd policy is very flexible allowing users to setup
82 their qmail_smtpd processes in as secure a method as possible.
83 STANDARD FILE CONTEXT
85 SELinux defines the file context types for the qmail_smtpd, if you
87 wanted to store files with these types in a different paths, you need
88 to execute the semanage command to specify alternate labeling and then
89 use restorecon to put the labels on disk.
90 semanage fcontext -a -t qmail_smtpd_exec_t '/srv/qmail_smtpd/con‐
92 tent(/.*)?'
93 restorecon -R -v /srv/myqmail_smtpd_content
94 Note: SELinux often uses regular expressions to specify labels that
96 match multiple files.
97 The following file types are defined for qmail_smtpd:
99 qmail_smtpd_exec_t
103 - Set files with the qmail_smtpd_exec_t type, if you want to transition
105 an executable to the qmail_smtpd_t domain.
106 Note: File context can be temporarily modified with the chcon command.
110 If you want to permanently change the file context you need to use the
111 semanage fcontext command. This will modify the SELinux labeling data‐
112 base. You will need to use restorecon to apply the labels.
113
116 semanage fcontext can also be used to manipulate default file context
117 mappings.
118 semanage permissive can also be used to manipulate whether or not a
120 process type is permissive.
121 semanage module can also be used to enable/disable/install/remove pol‐
123 icy modules.
124 semanage boolean can also be used to manipulate the booleans
126 system-config-selinux is a GUI tool available to customize SELinux pol‐
129 icy settings.
130
133 This manual page was auto-generated using sepolicy manpage .
134
137 selinux(8), qmail_smtpd(8), semanage(8), restorecon(8), chcon(1), se‐
138 policy(8), setsebool(8)
139qmail_smtpd 23-10-20 qmail_smtpd_selinux(8)