nagios_...selinux(8)

🌸 nagios_...selinux(8) — the SELinux policy for nagios_system_plugin 💅

okay bestie, so this is the nagios_...selinux(8) page, and it's literally all about SELinux Policy nagios_system_plugin. grab a snack, we're getting into mandatory access control together 🫶

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✨ NAME ✨

nagios_system_plugin_selinux — the Security Enhanced Linux Policy for the nagios_system_plugin processes 🎀

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🦋 DESCRIPTION 🦋

Security-Enhanced Linux secures the nagios_system_plugin processes via flexible mandatory access control. no cap, that's the whole vibe.

The nagios_system_plugin processes execute with the nagios_system_plugin_t SELinux type. wanna check if you've got these processes running? just run the ps command with the -Z qualifier. it's giving detective energy 🔍

For example:

ps -eZ | grep nagios_system_plugin_t

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🚪 ENTRYPOINTS 🚪

so the nagios_system_plugin_t SELinux type can be entered via the nagios_system_plugin_exec_t file type. that's the doorway, bestie 🚪✨

The default entrypoint paths for the nagios_system_plugin_t domain are the following:

/usr/lib(64)?/nagios/plugins/check_log,
/usr/lib(64)?/nagios/plugins/check_load,
/usr/lib(64)?/nagios/plugins/check_mrtg,
/usr/lib(64)?/nagios/plugins/check_swap,
/usr/lib(64)?/nagios/plugins/check_wave,
/usr/lib(64)?/nagios/plugins/check_procs,
/usr/lib(64)?/nagios/plugins/check_users,
/usr/lib(64)?/nagios/plugins/check_flexlm,
/usr/lib(64)?/nagios/plugins/check_nagios,
/usr/lib(64)?/nagios/plugins/check_nwstat,
/usr/lib(64)?/nagios/plugins/check_overcr,
/usr/lib(64)?/nagios/plugins/check_sensors,
/usr/lib(64)?/nagios/plugins/check_ifstatus,
/usr/lib(64)?/nagios/plugins/check_mrtgtraf,
/usr/lib(64)?/nagios/plugins/check_ifoperstatus

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👑 PROCESS TYPES 👑

SELinux defines process types (aka domains) for each process running on the system. iconic behaviour honestly 💜

You can see the context of a process using the -Z option to ps.

Policy governs the access confined processes have to files. The SELinux nagios_system_plugin policy is very flexible, allowing users to setup their nagios_system_plugin processes in as secure a method as possible. periodt.

The following process types are defined for nagios_system_plugin:

• nagios_system_plugin_t

Note: semanage permissive -a nagios_system_plugin_t can be used to make the process type nagios_system_plugin_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it won't block stuff but it WILL still snitch 😭

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🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. the nagios_system_plugin policy is extremely flexible and has several booleans that allow you to manipulate the policy and run nagios_system_plugin with the tightest access possible. we love a configurable queen 👑

If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

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🍓 MANAGED FILES 🍓

The SELinux process type nagios_system_plugin_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note: the processes UID still need to have DAC permissions — SELinux isn't out here doing your whole job for you, bestie 🙈

• nagios_system_plugin_tmp_t

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🌈 FILE CONTEXTS 🌈

SELinux requires files to have an extended attribute to define the file type. it's giving ✨metadata✨

You can see the context of a file using the -Z option to ls.

Policy governs the access confined processes have to these files. The SELinux nagios_system_plugin policy is very flexible, allowing users to setup their nagios_system_plugin processes in as secure a method as possible.

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for nagios_system_plugin. if you wanted to store files with these types in different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk. ok so like: relabel era 💫

semanage fcontext -a -t nagios_system_plugin_exec_t
'/srv/nagios_system_plugin/content(/.*)?'
restorecon -R -v /srv/mynagios_system_plugin_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies rise 🧚

The following file types are defined for nagios_system_plugin:

• nagios_system_plugin_exec_t — Set files with the nagios_system_plugin_exec_t type, if you want to transition an executable to the nagios_system_plugin_t domain.

Paths:

/usr/lib(64)?/nagios/plugins/check_log,
/usr/lib(64)?/nagios/plugins/check_load,
/usr/lib(64)?/nagios/plugins/check_mrtg,
/usr/lib(64)?/nagios/plugins/check_swap,
/usr/lib(64)?/nagios/plugins/check_wave,
/usr/lib(64)?/nagios/plugins/check_procs,
/usr/lib(64)?/nagios/plugins/check_users,
/usr/lib(64)?/nagios/plugins/check_flexlm,
/usr/lib(64)?/nagios/plugins/check_nagios,
/usr/lib(64)?/nagios/plugins/check_nwstat,
/usr/lib(64)?/nagios/plugins/check_overcr,
/usr/lib(64)?/nagios/plugins/check_sensors,
/usr/lib(64)?/nagios/plugins/check_ifstatus,
/usr/lib(64)?/nagios/plugins/check_mrtgtraf,
/usr/lib(64)?/nagios/plugins/check_ifoperstatus

• nagios_system_plugin_tmp_t — Set files with the nagios_system_plugin_tmp_t type, if you want to store nagios system plugin temporary files in the /tmp directories. 🗂️

Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels. so chcon = cute lil quick fix, semanage fcontext + restorecon = the real deal, iykyk 💅

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💀 COMMANDS 💀

• semanage fcontext can also be used to manipulate default file context mappings.
• semanage permissive can also be used to manipulate whether or not a process type is permissive.
• semanage module can also be used to enable/disable/install/remove policy modules.
• semanage boolean can also be used to manipulate the booleans.
• system-config-selinux is a GUI tool available to customize SELinux policy settings. ooh, a GUI, fancy 🌸

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🧚 AUTHOR 🧚

This manual page was auto-generated using sepolicy manpage. not me being written by a script 😭 still ate tho.

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🔥 SEE ALSO 🔥

selinux(8), nagios_system_plugin(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

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and that's the whole page, bestie 🫶 nagios_system_plugin · version/date 26-10-06 · nagios_...selinux(8) — go forth and label responsibly ✨💖