courier_..._selinux(8)

✨ NAME ✨

okay bestie, welcome to the courier_authdaemon_selinux manual page (that's courier_..._selinux(8) for short) — this is the SELinux Policy for the courier_authdaemon processes, and it's literally the glow-up your security needs. 💅

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💖 DESCRIPTION 💖

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

the courier_authdaemon processes execute with the courier_authdaemon_t SELinux type. you can check if you have these processes running by executing the ps command with the -Z qualifier. it's giving "who's online" energy, fr fr.

for example:

ps -eZ | grep courier_authdaemon_t

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🚪 ENTRYPOINTS 🚪

the courier_authdaemon_t SELinux type can be entered via the courier_authdaemon_exec_t file type. think of it as the VIP door to the domain. 🫶

the default entrypoint paths for the courier_authdaemon_t domain are the following:

• /usr/lib/courier/authlib/.*
• /usr/bin/authdaemond

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🧬 PROCESS TYPES 🧬

SELinux defines process types (domains) for each process running on the system. it's giving main character energy for every single process.

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

policy governs the access confined processes have to files. SELinux courier_authdaemon policy is very flexible allowing users to setup their courier_authdaemon processes in as secure a method as possible. lowkey obsessed with how customizable this is.

the following process types are defined for courier_authdaemon:

• courier_authdaemon_t

Note: semanage permissive -a courier_authdaemon_t can be used to make the process type courier_authdaemon_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so it's like, not a full pass, just a warning shot. 💀

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🔘 BOOLEANS 🔘

SELinux policy is customizable based on least access required. courier_authdaemon policy is extremely flexible and has several booleans that allow you to manipulate the policy and run courier_authdaemon with the tightest access possible. it's giving "customize your privacy settings" but for daemons. ✨

• daemons_dontaudit_scheduling — if you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on this boolean. Enabled by default.

setsebool -P daemons_dontaudit_scheduling 1

• fips_mode — if you want to allow all domains to execute in fips_mode, you must turn on this boolean. Enabled by default.

setsebool -P fips_mode 1

• nis_enabled — if you want to allow system to run with NIS, you must turn on this boolean. Disabled by default.

setsebool -P nis_enabled 1

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📁 MANAGED FILES 📁

the SELinux process type courier_authdaemon_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 like, you can't just waltz in without the right creds, bestie. 🙈

• 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

• courier_spool_t

/var/spool/courier(/.*)?
/var/spool/authdaemon(/.*)?

• courier_var_run_t

/run/courier(/.*)?

• faillog_t

/var/log/btmp.*
/run/faillock(/.*)?
/var/log/faillog.*
/var/log/tallylog.*

• 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

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🏷️ FILE CONTEXTS 🏷️

SELinux requires files to have an extended attribute to define the file type. it's like a permanent name tag for your files. 🎀

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

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

🌸 STANDARD FILE CONTEXT 🌸

SELinux defines the file context types for the courier_authdaemon, 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. it's giving "move it and relabel it" realness. 💅

semanage fcontext -a -t courier_authdaemon_exec_t '/srv/courier_authdaemon/content(/.*)?'
restorecon -R -v /srv/mycourier_authdaemon_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. so like, the /.* is doing the heavy lifting and we love her for it. 😭

the following file types are defined for courier_authdaemon:

• courier_authdaemon_exec_t

set files with the courier_authdaemon_exec_t type, if you want to transition an executable to the courier_authdaemon_t domain. it's literally the icon that gets you into the VIP domain. 🔥

paths:

/usr/lib/courier/authlib/.*, /usr/bin/authdaemond

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. no shortcuts, bestie — permanent changes require the full trio. 🫶

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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. point-and-click energy for when you're feeling fancy. ✨

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✍️ AUTHOR ✍️

this manual page was auto-generated using sepolicy manpage. so like, no human author to thank, but the tool ate. 💅

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👀 SEE ALSO 👀

selinux(8), courier_authdaemon(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8) — go check these out if you want the full lore. iykyk. 🌈

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courier_authdaemon · 26-10-06 · courier_..._selinux(8)

that's the whole manual, bestie — go secure those courier authdaemon processes and slay. 😘💖