1ndc_selinux(8) SELinux Policy ndc ndc_selinux(8)
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6 ndc_selinux - Security Enhanced Linux Policy for the ndc processes
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9 Security-Enhanced Linux secures the ndc processes via flexible manda‐
10 tory access control.
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12 The ndc processes execute with the ndc_t SELinux type. You can check if
13 you have these processes running by executing the ps command with the
14 -Z qualifier.
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16 For example:
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18 ps -eZ | grep ndc_t
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23 The ndc_t SELinux type can be entered via the ndc_exec_t file type.
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25 The default entrypoint paths for the ndc_t domain are the following:
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27 /usr/sbin/r?ndc
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30 SELinux defines process types (domains) for each process running on the
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33 You can see the context of a process using the -Z option to ps
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35 Policy governs the access confined processes have to files. SELinux
36 ndc policy is very flexible allowing users to setup their ndc processes
37 in as secure a method as possible.
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39 The following process types are defined for ndc:
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41 ndc_t
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43 Note: semanage permissive -a ndc_t can be used to make the process type
44 ndc_t permissive. SELinux does not deny access to permissive process
45 types, but the AVC (SELinux denials) messages are still generated.
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49 SELinux policy is customizable based on least access required. ndc
50 policy is extremely flexible and has several booleans that allow you to
51 manipulate the policy and run ndc with the tightest access possible.
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55 If you want to allow users to resolve user passwd entries directly from
56 ldap rather then using a sssd server, you must turn on the authlo‐
57 gin_nsswitch_use_ldap boolean. Disabled by default.
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59 setsebool -P authlogin_nsswitch_use_ldap 1
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63 If you want to allow all daemons the ability to read/write terminals,
64 you must turn on the daemons_use_tty boolean. Disabled by default.
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66 setsebool -P daemons_use_tty 1
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70 If you want to deny any process from ptracing or debugging any other
71 processes, you must turn on the deny_ptrace boolean. Enabled by
72 default.
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74 setsebool -P deny_ptrace 1
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78 If you want to allow any process to mmap any file on system with
79 attribute file_type, you must turn on the domain_can_mmap_files bool‐
80 ean. Enabled by default.
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82 setsebool -P domain_can_mmap_files 1
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86 If you want to allow all domains write to kmsg_device, while kernel is
87 executed with systemd.log_target=kmsg parameter, you must turn on the
88 domain_can_write_kmsg boolean. Disabled by default.
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90 setsebool -P domain_can_write_kmsg 1
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94 If you want to allow all domains to use other domains file descriptors,
95 you must turn on the domain_fd_use boolean. Enabled by default.
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97 setsebool -P domain_fd_use 1
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101 If you want to allow all domains to have the kernel load modules, you
102 must turn on the domain_kernel_load_modules boolean. Disabled by
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105 setsebool -P domain_kernel_load_modules 1
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109 If you want to allow all domains to execute in fips_mode, you must turn
110 on the fips_mode boolean. Enabled by default.
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112 setsebool -P fips_mode 1
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116 If you want to enable reading of urandom for all domains, you must turn
117 on the global_ssp boolean. Disabled by default.
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119 setsebool -P global_ssp 1
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123 If you want to allow confined applications to run with kerberos, you
124 must turn on the kerberos_enabled boolean. Enabled by default.
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126 setsebool -P kerberos_enabled 1
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130 If you want to allow system to run with NIS, you must turn on the
131 nis_enabled boolean. Disabled by default.
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133 setsebool -P nis_enabled 1
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137 If you want to allow confined applications to use nscd shared memory,
138 you must turn on the nscd_use_shm boolean. Disabled by default.
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140 setsebool -P nscd_use_shm 1
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145 SELinux requires files to have an extended attribute to define the file
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148 You can see the context of a file using the -Z option to ls
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150 Policy governs the access confined processes have to these files.
151 SELinux ndc policy is very flexible allowing users to setup their ndc
152 processes in as secure a method as possible.
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154 The following file types are defined for ndc:
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158 ndc_exec_t
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160 - Set files with the ndc_exec_t type, if you want to transition an exe‐
161 cutable to the ndc_t domain.
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165 Note: File context can be temporarily modified with the chcon command.
166 If you want to permanently change the file context you need to use the
167 semanage fcontext command. This will modify the SELinux labeling data‐
168 base. You will need to use restorecon to apply the labels.
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172 semanage fcontext can also be used to manipulate default file context
173 mappings.
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175 semanage permissive can also be used to manipulate whether or not a
176 process type is permissive.
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178 semanage module can also be used to enable/disable/install/remove pol‐
179 icy modules.
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181 semanage boolean can also be used to manipulate the booleans
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184 system-config-selinux is a GUI tool available to customize SELinux pol‐
185 icy settings.
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189 This manual page was auto-generated using sepolicy manpage .
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193 selinux(8), ndc(8), semanage(8), restorecon(8), chcon(1), sepolicy(8) ,
194 setsebool(8)
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198ndc 19-04-25 ndc_selinux(8)