rhgb_selinux(8)

💅 rhgb_selinux(8) — the SELinux policy for rhgb, explained bestie-to-bestie

okay so this is the rhgb_selinux page from the rhgb manual section 8, and it's literally all about how SELinux babysits the rhgb processes. grab a lil snack, we're getting into it 🍓

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✨ NAME ✨

rhgb_selinux — Security Enhanced Linux Policy for the rhgb processes

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🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the rhgb processes via flexible mandatory access control. yes bestie, mandatory — not the vibes-based kind, the enforced kind 💅

The rhgb processes execute with the rhgb_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.

For example:

ps -eZ | grep rhgb_t

that's it, that's the vibe check 🔥

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🦋 ENTRYPOINTS 🦋

The rhgb_t SELinux type can be entered via the rhgb_exec_t file type.

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

/usr/bin/rhgb

one path, one icon, main character energy 👑

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🎀 PROCESS TYPES 🎀

SELinux defines process types (domains) for each process running on the system

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

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

The following process types are defined for rhgb:

rhgb_t

Note: semanage permissive -a rhgb_t can be used to make the process type rhgb_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it stops blocking stuff but it's still gonna be in your notifications being messy 😭

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💖 BOOLEANS 💖

SELinux policy is customizable based on least access required. rhgb policy is extremely flexible and has several booleans that allow you to manipulate the policy and run rhgb with the tightest access possible. lowkey obsessed with how tunable this is.

If you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. Enabled by default.

setsebool -P daemons_dontaudit_scheduling 1

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

If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Enabled by default.

setsebool -P nscd_use_shm 1

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🌈 MANAGED FILES 🌈

The SELinux process type rhgb_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 said "you can come in, but your UID still has to have a pass" 🙈

• cluster_conf_t

/etc/cluster(/.*)?

• cluster_var_lib_t

/var/lib/pcsd(/.*)?
/var/lib/cluster(/.*)?
/var/lib/openais(/.*)?
/var/lib/pengine(/.*)?
/var/lib/corosync(/.*)?
/usr/lib/heartbeat(/.*)?
/var/lib/heartbeat(/.*)?
/var/lib/pacemaker(/.*)?

• cluster_var_run_t

/run/crm(/.*)?
/run/cman_.*
/run/rsctmp(/.*)?
/run/aisexec.*
/run/heartbeat(/.*)?
/run/pcsd-ruby.socket
/run/corosync-qnetd(/.*)?
/run/corosync-qdevice(/.*)?
/run/pcsd.socket
/run/corosync.pid
/run/cpglockd.pid
/run/rgmanager.pid
/run/cluster/rgmanager.sk

• rhgb_tmpfs_t — no default paths listed for this one, it's mysterious like that 🧚
• root_t

/sysroot/.aleph-version.json
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp

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⭐ FILE CONTEXTS ⭐

SELinux requires files to have an extended attribute to define the file type.

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

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

💜 STANDARD FILE CONTEXT 💜

SELinux defines the file context types for the rhgb, if you wanted to store files with these types in a different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk.

semanage fcontext -a -t rhgb_exec_t '/srv/rhgb/content(/.*)?'
restorecon -R -v /srv/myrhgb_content

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

The following file types are defined for rhgb:

• rhgb_exec_t — Set files with the rhgb_exec_t type, if you want to transition an executable to the rhgb_t domain.
• rhgb_tmpfs_t — Set files with the rhgb_tmpfs_t type, if you want to store rhgb files on a tmpfs file system.

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. temporary vs permanent, know the difference bestie, it's giving consequences 💀

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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. a whole GUI, for the girlies who don't do terminal ✨

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🎀 AUTHOR 🎀

This manual page was auto-generated using sepolicy manpage . — yes the robot wrote it, but I'm the one explaining it to you 💖

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🔥 SEE ALSO 🔥

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

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and that's the whole page, bestie, you ate it up 💅

okay so the sign-off: this one's from rhgb, version/date 26-10-06, and it lives at rhgb_selinux(8) in section 8 of the manual. go forth and label responsibly 🦋🌸💖