bcfg2_selinux(8)

📦 version 38.1.87, in centos-stream 9

💖 bcfg2_selinux(8) 💖

Okay bestie, welcome to bcfg2_selinux — the <hotpink>SELinux Policy bcfg2</hotpink> manual page — and we’re about to make mandatory access control feel like a group chat. ✨

🌸 NAME 🌸

bcfg2_selinux — Security Enhanced Linux Policy for the bcfg2 processes. Periodt. 💅

🦋 DESCRIPTION 🦋

Security-Enhanced Linux secures the bcfg2 processes via flexible mandatory access control.

The bcfg2 processes execute with the bcfg2_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 bcfg2_t

That’s your little vibe check for bcfg2 process contexts. 🫶

✨ ENTRYPOINTS ✨

The bcfg2_t SELinux type can be entered via the bcfg2_exec_t file type.

The default entrypoint paths for the bcfg2_t domain are the following:

/usr/sbin/bcfg2-server

Entrypoint path said, “I’m the main character,” and honestly? It ate. 👑

🔥 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 bcfg2 policy is very flexible allowing users to setup their bcfg2 processes in as secure a method as possible.

The following process types are defined for bcfg2:

  • bcfg2_t
Note: semanage permissive -a bcfg2_t can be used to make the process type bcfg2_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

So yes, permissive mode is a thing, but the AVC messages are still gonna be in the chat. 😭

🍓 BOOLEANS 🍓

SELinux policy is customizable based on least access required. bcfg2 policy is extremely flexible and has several booleans that allow you to manipulate the policy and run bcfg2 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

Boolean check: slayed. 🎀

🧚 MANAGED FILES 🧚

The SELinux process type bcfg2_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.

bcfg2_var_lib_t

/var/lib/bcfg2(/.*)?

bcfg2_var_run_t

/var/run/bcfg2-server.pid

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

/var/run/crm(/.*)?
/var/run/cman_.*
/var/run/rsctmp(/.*)?
/var/run/aisexec.*
/var/run/heartbeat(/.*)?
/var/run/pcsd-ruby.socket
/var/run/corosync-qnetd(/.*)?
/var/run/corosync-qdevice(/.*)?
/var/run/pcsd.socket
/var/run/corosync.pid
/var/run/cpglockd.pid
/var/run/rgmanager.pid
/var/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/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd

That’s a whole lot of paths, but we keep every single one. No skipping the “boring” parts in this house. 💖

🌈 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 bcfg2 policy is very flexible allowing users to setup their bcfg2 processes in as secure a method as possible.

🎀 STANDARD FILE CONTEXT 🎀

SELinux defines the file context types for the bcfg2, 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 bcfg2_var_run_t '/srv/mybcfg2_content(/.*)?'
restorecon -R -v /srv/mybcfg2_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.

The following file types are defined for bcfg2:

  • bcfg2_exec_t — Set files with the bcfg2_exec_t type, if you want to transition an executable to the bcfg2_t domain.
  • bcfg2_initrc_exec_t — Set files with the bcfg2_initrc_exec_t type, if you want to transition an executable to the bcfg2_initrc_t domain.
  • bcfg2_unit_file_t — Set files with the bcfg2_unit_file_t type, if you want to treat the files as bcfg2 unit content.
  • bcfg2_var_lib_t — Set files with the bcfg2_var_lib_t type, if you want to store the bcfg2 files under the /var/lib directory.
  • bcfg2_var_run_t — Set files with the bcfg2_var_run_t type, if you want to store the bcfg2 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 labeling: know the difference, bestie. chcon is cute for a quick change; semanage fcontext plus restorecon is the permanent glow-up. 💅

👑 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.

GUI tool in the chat too — iconic. 🖥️✨

💜 AUTHOR 💜

This manual page was auto-generated using sepolicy manpage .

Auto-generated and still serving looks. We love to see it. 💖

🌟 SEE ALSO 🌟

selinux(8), bcfg2(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

Source/version: bcfg2 🌸 date: 26-10-23 🌸 page: bcfg2_selinux(8). That’s the footer vibe, bestie — now go forth and slay your SELinux policy. 💖✨🎀

📦 where this page comes from