syslogd_selinux(8)

Hey bestie! 💖 Welcome to syslogd_selinux(8) — the SELinux Policy for syslogd processes. I’m gonna walk you through this like we’re decoding the group chat, but make no mistake: every path, boolean, port, and command is staying exactly where it belongs. ✨

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🌸 NAME 🌸

syslogd_selinux — Security Enhanced Linux Policy for the syslogd processes. That’s the whole name vibe, periodt. 💅

🦋 DESCRIPTION 🦋

Security-Enhanced Linux secures the syslogd processes via flexible mandatory access control. These syslogd processes run with the syslogd_t SELinux type.

Wanna check if you’ve got these processes running? Run ps with the -Z qualifier, like this:

ps -eZ | grep syslogd_t

✨ ENTRYPOINTS ✨

The syslogd_t SELinux type can be entered via the syslogd_exec_t file type. The default entrypoint paths for the syslogd_t domain are these, bestie:

/usr/bin/metalog, /usr/bin/syslogd, /usr/bin/minilogd, /usr/bin/rsyslogd, /usr/bin/syslog-ng, /usr/lib/systemd/systemd-journald, /usr/lib/systemd/systemd-kmsg-syslogd

🎀 PROCESS TYPES 🎀

SELinux defines process types — aka 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 syslogd policy is very flexible and lets users set up their syslogd processes in as secure a method as possible.

The following process types are defined for syslogd:

• syslogd_t
• syslogd_unconfined_script_t

Note: semanage permissive -a syslogd_t can be used to make the process type syslogd_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. The syslogd policy is extremely flexible and has several booleans that let you manipulate the policy and run syslogd with the tightest access possible. Slay. 💅

• daemons_dontaudit_scheduling — if you want to dontaudit all daemons scheduling requests (setsched, sys_nice), turn this on. Enabled by default. setsebool -P daemons_dontaudit_scheduling 1
• fips_mode — if you want to allow all domains to execute in fips_mode, turn this on. Enabled by default. setsebool -P fips_mode 1
• kerberos_enabled — if you want to allow confined applications to run with kerberos, turn this on. Enabled by default. setsebool -P kerberos_enabled 1
• logging_syslogd_append_public_content — if you want to allow the syslogd daemon to append public content files, turn this on. Disabled by default. setsebool -P logging_syslogd_append_public_content 1
• logging_syslogd_can_sendmail — if you want to allow the syslogd daemon to send mail, turn this on. Disabled by default. setsebool -P logging_syslogd_can_sendmail 1
• logging_syslogd_list_non_security_dirs — if you want to allow the syslogd daemon to list non security directories, turn this on. Disabled by default. setsebool -P logging_syslogd_list_non_security_dirs 1
• logging_syslogd_run_nagios_plugins — if you want to allow syslogd the ability to call nagios plugins, turn this on. It is turned on by the omprog rsyslog plugin. Disabled by default. setsebool -P logging_syslogd_run_nagios_plugins 1
• logging_syslogd_run_unconfined — if you want to allow syslog to run unconfined scripts, turn this on. Disabled by default. setsebool -P logging_syslogd_run_unconfined 1
• logging_syslogd_use_tty — if you want to allow syslogd the ability to read/write terminals, turn this on. Enabled by default. setsebool -P logging_syslogd_use_tty 1
• nis_enabled — if you want to allow the system to run with NIS, turn this on. Disabled by default. setsebool -P nis_enabled 1

🐚 PORT TYPES 🐚

SELinux defines port types to represent TCP and UDP ports. You can see the types associated with a port by using this command:

semanage port -l

Policy governs the access confined processes have to these ports. SELinux syslogd policy is very flexible and lets users set up their syslogd processes in as secure a method as possible. The following port types are defined for syslogd:

• syslog_tls_port_t — Default Defined Ports:

tcp 6514,10514
udp 6514,10514

• syslogd_port_t — Default Defined Ports:

tcp 601,20514
udp 514,601,20514

🧚 MANAGED FILES 🧚

The SELinux process type syslogd_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. No cap. 🫶

• 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

• logfile — all log files.
• root_t

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

• security_t

/selinux

• syslogd_tmp_t — no default paths listed.
• syslogd_tmpfs_t — no default paths listed.
• syslogd_var_lib_t

/var/lib/r?syslog(/.*)?, /var/lib/syslog-ng(/.*)?, /var/lib/syslog-ng.persist, /var/lib/misc/syslog-ng.persist-?

• syslogd_var_run_t

/run/log(/.*)?, /run/rsyslog(/.*)?, /run/syslog-ng.ctl, /run/syslog-ng(/.*)?, /run/systemd/journal(/.*)?, /run/systemd/journal.[^/]+(/.*)?, /run/metalog.pid, /run/syslogd.pid

• systemd_bootchart_tmpfs_t — no default paths listed.
• systemd_coredump_tmpfs_t — no default paths listed.

💜 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 syslogd policy is very flexible and lets users set up their syslogd processes in as secure a method as possible.

🌸 EQUIVALENCE DIRECTORIES 🌸

syslogd policy stores data with multiple different file context types under the /var/lib/syslog-ng directory. If you would like to store the data in a different directory, you can use the semanage command to create an equivalence mapping. If you wanted to store this data under the /srv directory, you would execute the following command:

semanage fcontext -a -e /var/lib/syslog-ng /srv/syslog-ng
restorecon -R -v /srv/syslog-ng

🎀 STANDARD FILE CONTEXT 🎀

SELinux defines the file context types for syslogd. 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. Iconic. ✨

semanage fcontext -a -t syslogd_exec_t '/srv/syslogd/content(/.*)?'
restorecon -R -v /srv/mysyslogd_content

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

The following file types are defined for syslogd:

• syslogd_exec_t — set files with the syslogd_exec_t type if you want to transition an executable to the syslogd_t domain.

Paths:

/usr/bin/metalog, /usr/bin/syslogd, /usr/bin/minilogd, /usr/bin/rsyslogd, /usr/bin/syslog-ng, /usr/lib/systemd/systemd-journald, /usr/lib/systemd/systemd-kmsg-syslogd

• syslogd_initrc_exec_t — set files with the syslogd_initrc_exec_t type if you want to transition an executable to the syslogd_initrc_t domain.
• syslogd_tmp_t — set files with the syslogd_tmp_t type if you want to store syslogd temporary files in the /tmp directories.
• syslogd_tmpfs_t — set files with the syslogd_tmpfs_t type if you want to store syslogd files on a tmpfs file system.
• syslogd_unconfined_script_exec_t — set files with the syslogd_unconfined_script_exec_t type if you want to transition an executable to the syslogd_unconfined_script_t domain.
• syslogd_unit_file_t — set files with the syslogd_unit_file_t type if you want to treat the files as syslogd unit content.
• syslogd_var_lib_t — set files with the syslogd_var_lib_t type if you want to store the syslogd files under the /var/lib directory.

Paths:

/var/lib/r?syslog(/.*)?, /var/lib/syslog-ng(/.*)?, /var/lib/syslog-ng.persist, /var/lib/misc/syslog-ng.persist-?

• syslogd_var_run_t — set files with the syslogd_var_run_t type if you want to store the syslogd files under the /run or /var/run directory.

Paths:

/run/log(/.*)?, /run/rsyslog(/.*)?, /run/syslog-ng.ctl, /run/syslog-ng(/.*)?, /run/systemd/journal(/.*)?, /run/systemd/journal.[^/]+(/.*)?, /run/metalog.pid, /run/syslogd.pid

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. Don’t skip that step, bestie. 😭

🫶 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.

👑 AUTHOR 👑

This manual page was auto-generated using sepolicy manpage. Not me writing my own lore, just the tool doing its thing. 💫

🌈 SEE ALSO 🌈

selinux(8), syslogd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8), syslogd_unconfined_script_selinux(8)

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💖 That’s the whole manual page, bestie! Source/version tag: syslogd, date 26-10-06, and the page itself is syslogd_selinux(8). Byeee! 💅✨