systemd_..._selinux(8)

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

🦋 systemd_..._selinux(8) — the SELinux Policy page for systemd_networkd, bestie ✨

okay so the manual name here is systemd_networkd_selinux(8), and this whole page is about the Security Enhanced Linux Policy for the systemd_networkd processes. Let’s get into it 💅💖

🎀 NAME 🎀

  • systemd_networkd_selinux — Security Enhanced Linux Policy for the systemd_networkd processes. Periodt 🫶

✨ DESCRIPTION ✨

Security-Enhanced Linux secures the systemd_networkd processes via flexible mandatory access control. Iconic behavior honestly 🌸

The systemd_networkd processes execute with the systemd_networkd_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 systemd_networkd_t

🌈 ENTRYPOINTS 🌈

The systemd_networkd_t SELinux type can be entered via the systemd_networkd_exec_t file type.

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

/usr/lib/systemd/systemd-networkd

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system, bestie.

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

Policy governs the access confined processes have to files. SELinux systemd_networkd policy is very flexible, allowing users to set up their systemd_networkd processes in as secure a method as possible 🔥

The following process types are defined for systemd_networkd:

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

🍓 BOOLEANS 🍓

SELinux policy is customizable based on least access required. systemd_networkd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run systemd_networkd with the tightest access possible ✨

  • daemons_dontaudit_scheduling — 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
  • fips_mode — 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
  • nis_enabled — 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

🦋 MANAGED FILES 🦋

The SELinux process type systemd_networkd_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, 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

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

systemd_networkd_tmpfs_t — no paths listed in the original, bestie 🙈

systemd_networkd_var_lib_t

/var/lib/systemd/network(/.*)?

systemd_networkd_var_run_t

/run/systemd/netif(/.*)?

💜 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 systemd_networkd policy is very flexible, allowing users to set up their systemd_networkd processes in as secure a method as possible 🫶

🌸 STANDARD FILE CONTEXT 🌸

SELinux defines the file context types for systemd_networkd. 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.

The page shows it like this:

semanage fcontext -a -t systemd_networkd_exec_t
'/srv/systemd_networkd/content(/.*)?'
restorecon -R -v /srv/mysystemd_networkd_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. Iykyk 😭

The following file types are defined for systemd_networkd:

  • systemd_networkd_exec_t — Set files with the systemd_networkd_exec_t type if you want to transition an executable to the systemd_networkd_t domain.
  • systemd_networkd_tmpfs_t — Set files with the systemd_networkd_tmpfs_t type if you want to store systemd networkd files on a tmpfs file system.
  • systemd_networkd_unit_file_t — Set files with the systemd_networkd_unit_file_t type if you want to treat the files as systemd networkd unit content.
  • systemd_networkd_var_lib_t — Set files with the systemd_networkd_var_lib_t type if you want to store the systemd networkd files under the /var/lib directory.
  • systemd_networkd_var_run_t — Set files with the systemd_networkd_var_run_t type if you want to store the systemd networkd 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. 💅

🧚 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.

🎀 AUTHOR 🎀

This manual page was auto-generated using sepolicy manpage . 🫶

🌟 SEE ALSO 🌟

Go read: selinux(8), systemd_networkd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8), systemd_network_generator_selinux(8) ✨

That’s the whole page, bestie 💖 Source/version: systemd_networkd; date: 26-10-06; manual: systemd_..._selinux(8). Byeee 👑💅

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