cyphesis_selinux(8)

📦
version 20250627+git412.dbf877ab7 · 7 versions
, in opensuse-leap 16.0

💅 cyphesis_selinux(8) — the SELinux policy page for cyphesis, bestie edition

Okay so real talk: this is the cyphesis_selinux(8) manual page, and it's all about the SELinux policy that keeps the cyphesis processes on a leash. It's giving "security but make it structured" ✨

🌸 NAME

cyphesis_selinux — Security Enhanced Linux Policy for the cyphesis processes 🎀

✨ DESCRIPTION

Security-Enhanced Linux secures the cyphesis processes via flexible mandatory access control. No cap, that's the whole vibe.

The cyphesis processes execute with the cyphesis_t SELinux type. Wanna check if you've got these processes running? Just run the ps command with the -Z qualifier, bestie.

For example:

ps -eZ | grep cyphesis_t

🚪 ENTRYPOINTS

The cyphesis_t SELinux type can be entered via the cyphesis_exec_t file type. That's the door, fr fr.

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

/usr/bin/cyphesis

👑 PROCESS TYPES

SELinux defines process types (domains) for each process running on the system. It's a whole thing, but a good thing.

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

Policy governs the access confined processes have to files. SELinux cyphesis policy is very flexible, allowing users to setup their cyphesis processes in as secure a method as possible. Iconic behaviour honestly.

The following process types are defined for cyphesis:

  • cyphesis_t
Note: semanage permissive -a cyphesis_t can be used to make the process type cyphesis_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. So like, you're not off the hook — the receipts still exist 💀

🎚️ BOOLEANS

SELinux policy is customizable based on least access required. cyphesis policy is extremely flexible and has several booleans that allow you to manipulate the policy and run cyphesis with the tightest access possible. Tightest access = main character energy 🔥

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 confined applications to run with kerberos, you must turn on the kerberos_enabled boolean. Enabled by default.

setsebool -P kerberos_enabled 1

If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Enabled by default.

setsebool -P nscd_use_shm 1

🔌 PORT TYPES

SELinux defines port types to represent TCP and UDP ports. Cute, right?

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

The following port types are defined for cyphesis:

cyphesis_port_t

Default Defined Ports:

tcp 6767,6769,6780-6799
udp 32771

📂 MANAGED FILES

The SELinux process type cyphesis_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. Yeah — SELinux said "I got it from here," but DAC still checks your ID at the door 🙈

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

cyphesis_var_run_t

/run/cyphesis(/.*)?

root_t

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

🗂️ FILE CONTEXTS

SELinux requires files to have an extended attribute to define the file type. Very extra of it, but okay.

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

🌈 STANDARD FILE CONTEXT

SELinux defines the file context types for the cyphesis. So 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 cyphesis_exec_t '/srv/cyphesis/content(/.*)?'
restorecon -R -v /srv/mycyphesis_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 cyphesis:

cyphesis_exec_t

  • Set files with the cyphesis_exec_t type, if you want to transition an executable to the cyphesis_t domain.

cyphesis_initrc_exec_t

  • Set files with the cyphesis_initrc_exec_t type, if you want to transition an executable to the cyphesis_initrc_t domain.

cyphesis_log_t

  • Set files with the cyphesis_log_t type, if you want to treat the data as cyphesis log data, usually stored under the /var/log directory.

cyphesis_tmp_t

  • Set files with the cyphesis_tmp_t type, if you want to store cyphesis temporary files in the /tmp directories.

cyphesis_var_run_t

  • Set files with the cyphesis_var_run_t type, if you want to store the cyphesis 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 is literally the whole plot twist here 😭

🛠️ 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. A whole GUI, for the girlies who prefer clicking 🫶

✍️ AUTHOR

This manual page was auto-generated using sepolicy manpage. Not me writing my own bio — the machine did it 💀

🔗 SEE ALSO

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

okay that's the whole page bestie, go forth and confine some processes 💖

Sign-off time: this gem is cyphesis, dated 26-10-06, and it lives at cyphesis_selinux(8). Slay. 🎀

📦 where this page comes from