slpd_selinux(8)

💅 slpd_selinux — the SELinux glow-up for slpd ✨

Okay bestie, so this is the manual page for the SELinux policy that governs the slpd processes — and it's lowkey iconic. It's from the slpd_selinux part of the manual set, and we're gonna walk through it together, no gatekeeping. 🫶

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🌸 NAME 🌸

slpd_selinux — Security Enhanced Linux Policy for the slpd processes. Periodt.

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🎀 DESCRIPTION 🎀

Security-Enhanced Linux secures the slpd processes via flexible mandatory access control. That's the whole vibe — MAC, but make it fashion. 💅

The slpd processes execute with the slpd_t SELinux type. And like, you can totally check if you have these processes running by executing the ps command with the -Z qualifier.

For example:

ps -eZ | grep slpd_t

It's giving detective energy, honestly. 🔍

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🦋 ENTRYPOINTS 🦋

The slpd_t SELinux type can be entered via the slpd_exec_t file type.

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

/usr/bin/slpd

One path, one destiny. Main character energy fr. ⭐

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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 slpd policy is very flexible, allowing users to setup their slpd processes in as secure a method as possible.

The following process types are defined for slpd:

slpd_t

Note: semanage permissive -a slpd_t can be used to make the process type slpd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. So like, it's chill about denying but it's still gonna snitch in the logs. 😭

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✨ BOOLEANS ✨

SELinux policy is customizable based on least access required — the "give them only what they need" philosophy, and honestly goals. 💖 The slpd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run slpd with the tightest access possible.

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

Three booleans, three little switches. Flip responsibly, bestie. 🎛️

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🧚 MANAGED FILES 🧚

The SELinux process type slpd_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. And remember — the processes UID still need to have DAC permissions. No skipping the basics, no cap.

🌈 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

🌈 krb5_host_rcache_t

/var/tmp/krb5_0.rcache2
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0

🌈 root_t

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

🌈 slpd_var_run_t

/run/slpd.pid

That's a lot of types but like, she contains multitudes. 🦋

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🍓 FILE CONTEXTS 🍓

SELinux requires files to have an extended attribute to define the file type. Fancy, right? 💅

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 slpd policy is very flexible, allowing users to setup their slpd processes in as secure a method as possible.

🌸 STANDARD FILE CONTEXT 🌸

SELinux defines the file context types for the slpd. 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 slpd_exec_t '/srv/slpd/content(/.*)?'
restorecon -R -v /srv/myslpd_content

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

The following file types are defined for slpd:

• slpd_exec_t — Set files with the slpd_exec_t type, if you want to transition an executable to the slpd_t domain.
• slpd_initrc_exec_t — Set files with the slpd_initrc_exec_t type, if you want to transition an executable to the slpd_initrc_t domain.
• slpd_log_t — Set files with the slpd_log_t type, if you want to treat the data as slpd log data, usually stored under the /var/log directory.
• slpd_var_run_t — Set files with the slpd_var_run_t type, if you want to store the slpd files under the /run or /var/run directory.

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 or it's gonna bite. 💀

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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. For when you want to point and click instead of typing, we respect both. 🫶

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⭐ AUTHOR ⭐

This manual page was auto-generated using sepolicy manpage. Not me being auto-generated and still having more personality than half the manpages out there. 😭

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💖 SEE ALSO 💖

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

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And that's the whole page, bestie — slay! 💅✨

This iconic little page came from the slpd source, dated 26-10-06, and it's the slpd_selinux(8) entry in the manual. Go forth and label things correctly. 🎀🦋💜