1hostname_selinux(8) SELinux Policy hostname hostname_selinux(8)
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6 hostname_selinux - Security Enhanced Linux Policy for the hostname pro‐
7 cesses
8
10 Security-Enhanced Linux secures the hostname processes via flexible
11 mandatory access control.
12 The hostname processes execute with the hostname_t SELinux type. You
14 can check if you have these processes running by executing the ps com‐
15 mand with the -Z qualifier.
16 For example:
18 ps -eZ | grep hostname_t
20
24 The hostname_t SELinux type can be entered via the hostname_exec_t file
25 type.
26 The default entrypoint paths for the hostname_t domain are the follow‐
28 ing:
29 /bin/hostname, /usr/bin/hostname
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 hostname policy is very flexible allowing users to setup their hostname
40 processes in as secure a method as possible.
41 The following process types are defined for hostname:
43 hostname_t
45 Note: semanage permissive -a hostname_t can be used to make the process
47 type hostname_t permissive. SELinux does not deny access to permissive
48 process types, but the AVC (SELinux denials) messages are still gener‐
49 ated.
50
53 SELinux policy is customizable based on least access required. host‐
54 name policy is extremely flexible and has several booleans that allow
55 you to manipulate the policy and run hostname with the tightest access
56 possible.
57 If you want to allow all daemons the ability to read/write terminals,
61 you must turn on the daemons_use_tty boolean. Disabled by default.
62 setsebool -P daemons_use_tty 1
64 If you want to deny any process from ptracing or debugging any other
68 processes, you must turn on the deny_ptrace boolean. Enabled by
69 default.
70 setsebool -P deny_ptrace 1
72 If you want to allow any process to mmap any file on system with
76 attribute file_type, you must turn on the domain_can_mmap_files bool‐
77 ean. Enabled by default.
78 setsebool -P domain_can_mmap_files 1
80 If you want to allow all domains write to kmsg_device, while kernel is
84 executed with systemd.log_target=kmsg parameter, you must turn on the
85 domain_can_write_kmsg boolean. Disabled by default.
86 setsebool -P domain_can_write_kmsg 1
88 If you want to allow all domains to use other domains file descriptors,
92 you must turn on the domain_fd_use boolean. Enabled by default.
93 setsebool -P domain_fd_use 1
95 If you want to allow all domains to have the kernel load modules, you
99 must turn on the domain_kernel_load_modules boolean. Disabled by
100 default.
101 setsebool -P domain_kernel_load_modules 1
103 If you want to allow all domains to execute in fips_mode, you must turn
107 on the fips_mode boolean. Enabled by default.
108 setsebool -P fips_mode 1
110 If you want to enable reading of urandom for all domains, you must turn
114 on the global_ssp boolean. Disabled by default.
115 setsebool -P global_ssp 1
117 If you want to allow system to run with NIS, you must turn on the
121 nis_enabled boolean. Disabled by default.
122 setsebool -P nis_enabled 1
124 If you want to allow confined applications to use nscd shared memory,
128 you must turn on the nscd_use_shm boolean. Disabled by default.
129 setsebool -P nscd_use_shm 1
131
135 SELinux requires files to have an extended attribute to define the file
136 type.
137 You can see the context of a file using the -Z option to ls
139 Policy governs the access confined processes have to these files.
141 SELinux hostname policy is very flexible allowing users to setup their
142 hostname processes in as secure a method as possible.
143 STANDARD FILE CONTEXT
145 SELinux defines the file context types for the hostname, if you wanted
147 to store files with these types in a diffent paths, you need to execute
148 the semanage command to sepecify alternate labeling and then use
149 restorecon to put the labels on disk.
150 semanage fcontext -a -t hostname_etc_t '/srv/myhostname_content(/.*)?'
152 restorecon -R -v /srv/myhostname_content
153 Note: SELinux often uses regular expressions to specify labels that
155 match multiple files.
156 The following file types are defined for hostname:
158 hostname_etc_t
162 - Set files with the hostname_etc_t type, if you want to store hostname
164 files in the /etc directories.
165 Paths:
168 /etc/hostname, /etc/machine-info
169 hostname_exec_t
172 - Set files with the hostname_exec_t type, if you want to transition an
174 executable to the hostname_t domain.
175 Paths:
178 /bin/hostname, /usr/bin/hostname
179 Note: File context can be temporarily modified with the chcon command.
182 If you want to permanently change the file context you need to use the
183 semanage fcontext command. This will modify the SELinux labeling data‐
184 base. You will need to use restorecon to apply the labels.
185
188 semanage fcontext can also be used to manipulate default file context
189 mappings.
190 semanage permissive can also be used to manipulate whether or not a
192 process type is permissive.
193 semanage module can also be used to enable/disable/install/remove pol‐
195 icy modules.
196 semanage boolean can also be used to manipulate the booleans
198 system-config-selinux is a GUI tool available to customize SELinux pol‐
201 icy settings.
202
205 This manual page was auto-generated using sepolicy manpage .
206
209 selinux(8), hostname(8), semanage(8), restorecon(8), chcon(1), sepol‐
210 icy(8) , setsebool(8)
211hostname 19-04-25 hostname_selinux(8)