psad_selinux(8)

💜 psad_selinux — the SELinux glow-up for your psad processes 💜

okay so bestie, this is the psad_selinux(8) manual page, and it's literally all about how SELinux keeps the psad processes in check. no cap, it's giving "mandatory access control but make it cute." 🎀

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✨ NAME ✨

psad_selinux — the Security Enhanced Linux Policy for the psad processes. periodt. 💅

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🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the psad processes via flexible mandatory access control. it's like a bouncer for your processes, but make it kernel-level. 🔥

The psad processes execute with the psad_t SELinux type. you can check if you have these processes running by executing the ps command with the -Z qualifier. yes, -Z is the icon ✨

For example:

ps -eZ | grep psad_t

run it, thank me later 🫶

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🦋 ENTRYPOINTS 🦋

The psad_t SELinux type can be entered via the psad_exec_t file type. that's the door, bestie 🚪

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

/usr/bin/psad

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👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. every process gets its own lil vibe check 🌈

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

Policy governs the access confined processes have to files. SELinux psad policy is very flexible, allowing users to setup their psad processes in as secure a method as possible. tightest access possible, but make it customizable 💖

The following process types are defined for psad:

• psad_t

Note: semanage permissive -a psad_t can be used to make the process type psad_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 but it still snitches 😭 keep that in mind fr fr

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💀 BOOLEANS 💀

SELinux policy is customizable based on least access required. psad policy is extremely flexible and has several booleans that allow you to manipulate the policy and run psad with the tightest access possible. booleans are the little on/off switches of the SELinux world, iykyk 🎚️

• 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

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🍓 MANAGED FILES 🍓

The SELinux process type psad_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. so yeah, SELinux said "you can come in" but DAC still gets a say 🙈

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

psad_tmp_t

(this one's just vibes, no default paths listed 💫)

psad_var_run_t

/run/psad(/.*)?

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. every file's got a little label on it, like a name tag at a party 🏷️

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

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the psad. 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. no cap, that's the whole workflow 💖

semanage fcontext -a -t psad_exec_t '/srv/psad/content(/.*)?'
restorecon -R -v /srv/mypsad_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies stay winning 🎀

The following file types are defined for psad:

• psad_etc_t — Set files with the psad_etc_t type, if you want to store psad files in the /etc directories.
• psad_exec_t — Set files with the psad_exec_t type, if you want to transition an executable to the psad_t domain.
• psad_initrc_exec_t — Set files with the psad_initrc_exec_t type, if you want to transition an executable to the psad_initrc_t domain.
• psad_tmp_t — Set files with the psad_tmp_t type, if you want to store psad temporary files in the /tmp directories.
• psad_var_lib_t — Set files with the psad_var_lib_t type, if you want to store the psad files under the /var/lib directory.
• psad_var_log_t — Set files with the psad_var_log_t type, if you want to treat the data as psad var log data, usually stored under the /var/log directory.
• psad_var_run_t — Set files with the psad_var_run_t type, if you want to store the psad 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 bestie 😭

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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.

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💜 AUTHOR 💜

This manual page was auto-generated using sepolicy manpage. (yes, the robots wrote it, and they ate 🔥)

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🌟 SEE ALSO 🌟

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

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and that's the whole page, bestie 🫶 this was psad from the SELinux policy collection, page psad_selinux(8), dated 26-10-06. go forth and label responsibly 💅✨