SYSTEMD_HOSTNAMED_SELINUX(8)

🎀 systemd_hostnamed_selinux 🎀

Okay so welcome to the systemd_...d_selinux(8) page, bestie! This is all about systemd_hostnamed_selinux and the SELinux policy for the systemd_hostnamed processes. It’s giving security, it’s giving mandatory access control, and we’re gonna go through every last detail. 💅✨

🌸 NAME 🌸

systemd_hostnamed_selinux — Security Enhanced Linux Policy for the systemd_hostnamed processes. Periodt. 💖

💖 DESCRIPTION 💖

Security-Enhanced Linux is out here securing the systemd_hostnamed processes via flexible mandatory access control. No cap. 🫶

The systemd_hostnamed processes execute with the systemd_hostnamed_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_hostnamed_t

🚪 ENTRYPOINTS 🚪

The systemd_hostnamed_t SELinux type can be entered via the systemd_hostnamed_exec_t file type. That’s the doorway, and it’s iconic. 🚪✨

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

• /usr/lib/systemd/systemd-hostnamed

👑 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 systemd_hostnamed policy is very flexible allowing users to setup their systemd_hostnamed processes in as secure a method as possible. 💜

The following process types are defined for systemd_hostnamed:

• systemd_hostnamed_t

Note: semanage permissive -a systemd_hostnamed_t can be used to make the process type systemd_hostnamed_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_hostnamed policy is extremely flexible and has several booleans that allow you to manipulate the policy and run systemd_hostnamed 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. Flip it with 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. Flip it with 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. Flip it with setsebool -P nis_enabled 1.

📂 MANAGED FILES 📂

The SELinux process type systemd_hostnamed_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. 🤓

• 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

🦋 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_hostnamed policy is very flexible allowing users to setup their systemd_hostnamed processes in as secure a method as possible. ✨

🧚 STANDARD FILE CONTEXT 🧚

SELinux defines the file context types for the systemd_hostnamed, 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 systemd_hostnamed_exec_t '/srv/systemd_hostnamed/content(/.*)?'
restorecon -R -v /srv/mysystemd_hostnamed_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. 🧚‍♀️

The following file types are defined for systemd_hostnamed:

• systemd_hostnamed_exec_t — set files with the systemd_hostnamed_exec_t type, if you want to transition an executable to the systemd_hostnamed_t domain.

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 🌈

• selinux(8)
• systemd_hostnamed(8)
• semanage(8)
• restorecon(8)
• chcon(1)
• sepolicy(8)
• setsebool(8)

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Okay bestie, that’s the whole page! Cute little sign-off: source/version systemd_hostnamed, date 26-10-06, manual name systemd_...d_selinux(8). Byeee, go keep those processes secure! 🫶💖