rwho_selinux(8)

💖 rwho_selinux(8) — SELinux Policy rwho 💖

okay so bestie, welcome to the rwho_selinux page (that's section 8 of the manual, iykyk) 🎀 this is the whole entire glow-up of how SELinux handles the rwho processes. grab a snack, we're going in 💅

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✨ NAME ✨

rwho_selinux — Security Enhanced Linux Policy for the rwho processes 🦋

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🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the rwho processes via flexible mandatory access control. literally that's the whole vibe — SELinux is the main character here and it's making sure rwho stays in its lane ✨

the rwho processes execute with the rwho_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 rwho_t

easy peasy, no cap 🫶

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🦋 ENTRYPOINTS 🦋

the rwho_t SELinux type can be entered via the rwho_exec_t file type 🌈

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

/usr/bin/rwhod

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

the following process types are defined for rwho:

rwho_t

Note: semanage permissive -a rwho_t can be used to make the process type rwho_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. 💀 like, it's not a free pass, the receipts still exist ngl

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🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. rwho policy is extremely flexible and has several booleans that allow you to manipulate the policy and run rwho 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

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💜 PORT TYPES 💜

SELinux defines port types to represent TCP and UDP ports 🌐

you can see the types associated with a port by using the following command:

semanage port -l

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

the following port types are defined for rwho:

rwho_port_t

default defined ports:

udp 513

periodt. that's the port 💅

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🌈 MANAGED FILES 🌈

the SELinux process type rwho_t can manage files labeled with the following file types. the paths listed are the default paths for these file types. note the process's UID still needs to have DAC permissions 🔑

• 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

• rwho_spool_t

/var/spool/rwho(/.*)?

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

🍓 STANDARD FILE CONTEXT 🍓

SELinux defines the file context types for rwho. 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 🎀

semanage fcontext -a -t rwho_exec_t '/srv/rwho/content(/.*)?'
restorecon -R -v /srv/myrwho_content

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

the following file types are defined for rwho:

• rwho_exec_t — set files with the rwho_exec_t type if you want to transition an executable to the rwho_t domain 🔥
• rwho_initrc_exec_t — set files with the rwho_initrc_exec_t type if you want to transition an executable to the rwho_initrc_t domain 🦋
• rwho_log_t — set files with the rwho_log_t type if you want to treat the data as rwho log data, usually stored under the /var/log directory 📝
• rwho_spool_t — set files with the rwho_spool_t type if you want to store the rwho files under the /var/spool 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. ⚠️ so like, chcon is the temporary tattoo and semanage fcontext is the real thing, no cap

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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 port can also be used to manipulate the port definitions 🌐

semanage boolean can also be used to manipulate the booleans 🎚️

system-config-selinux is a GUI tool available to customize SELinux policy settings 👑 (yes bestie, there's a GUI, you don't have to live in the terminal forever… but you probably will 💀)

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⭐ AUTHOR ⭐

this manual page was auto-generated using sepolicy manpage. 🤖 iconic behaviour, honestly

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🌸 SEE ALSO 🌸

selinux(8), rwho(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8) 💖

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and that's the whole page bestie!! this was rwho (the policy name up top 🌟) dated 26-10-06, in section rwho_selinux(8) — go forth and label responsibly, mwah 💋🎀✨