opendnssec_selinux(8)

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

💅 opendnssec_selinux(8) — the SELinux Policy for opendnssec, bestie edition 🎀

okay so real talk: this is section 8 of the manual, all about SELinux Policy opendnssec, and it's literally just the glow-up guide for how SELinux treats your opendnssec processes. no cap, it's more interesting than it sounds. let's go ✨

✨ NAME ✨

opendnssec_selinux — Security Enhanced Linux Policy for the opendnssec processes 🫶

🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the opendnssec processes via flexible mandatory access control. yes bestie, that means SELinux is the bouncer at the club and it's checking everyone's vibe before they touch anything 💅

The opendnssec processes execute with the opendnssec_t SELinux type. wanna check if you've got these processes running? just run the ps command with the -Z qualifier. iconic. here's the example, copy it exactly:

ps -eZ | grep opendnssec_t

🦋 ENTRYPOINTS 🦋

The opendnssec_t SELinux type can be entered via the opendnssec_exec_t file type. that's the doorway, the main character entrance, iykyk 🚪✨

The default entrypoint paths for the opendnssec_t domain are literally these:

/usr/bin/ods-signer, /usr/bin/ods-control, /usr/bin/ods-signerd,
/usr/bin/ods-enforcerd

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. every process gets its own little label, it's giving assigned seating at a wedding 💐

You can see the context of a process using the -Z option to ps. that's the whole trick, fr fr.

Policy governs the access confined processes have to files. SELinux opendnssec policy is very flexible allowing users to setup their opendnssec processes in as secure a method as possible. tightest access possible = the goal 🔥

The following process types are defined for opendnssec:

  • opendnssec_t
💀 Note: semanage permissive -a opendnssec_t can be used to make the process type opendnssec_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so it stops blocking but keeps snitching, basically 🙈

🍓 BOOLEANS 🍓

SELinux policy is customizable based on least access required. opendnssec policy is extremely flexible and has several booleans that allow you to manipulate the policy and run opendnssec with the tightest access possible. little toggles, big power 💅

  • 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

🌈 PORT TYPES 🌈

SELinux defines port types to represent TCP and UDP ports. ports have labels too, they're not just numbers bestie, they have lore 🧚

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

The following port types are defined for opendnssec:

  • opendnssec_port_t

Default Defined Ports:

tcp 15354
udp 15354

🔥 MANAGED FILES 🔥

The SELinux process type opendnssec_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. oh and this list is LONG, hydrate before reading, we're not skipping a single one 🫶

  • 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
  • named_cache_t
/var/lib/softhsm(/.*)?
/var/lib/unbound(/.*)?
/var/lib/named/data(/.*)?
/var/lib/named/slaves(/.*)?
/var/lib/named/dynamic(/.*)?
/var/lib/named/chroot/var/tmp(/.*)?
/var/lib/named/chroot/var/named/data(/.*)?
/var/lib/named/chroot/var/named/slaves(/.*)?
/var/lib/named/chroot/var/named/dynamic(/.*)?
  • opendnssec_conf_t
/etc/opendnssec(/.*)?
  • opendnssec_tmp_t — lol this one has no default paths listed, it's a mystery even to me 💀
  • opendnssec_var_run_t
/run/opendnssec(/.*)?
  • opendnssec_var_t
/var/opendnssec(/.*)?
  • 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. yes, files have aura, and the aura is stored as metadata ✨

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

🎀 STANDARD FILE CONTEXT 🎀

SELinux defines the file context types for the opendnssec, 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. relabeling arc, we love to see it 💅

semanage fcontext -a -t opendnssec_exec_t
'/srv/opendnssec/content(/.*)?'
restorecon -R -v /srv/myopendnssec_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies rise 🌸

The following file types are defined for opendnssec:

  • opendnssec_conf_t — Set files with the opendnssec_conf_t type, if you want to treat the files as opendnssec configuration data, usually stored under the /etc directory.
  • opendnssec_exec_t — Set files with the opendnssec_exec_t type, if you want to transition an executable to the opendnssec_t domain.

Paths:

/usr/bin/ods-signer, /usr/bin/ods-control, /usr/bin/ods-signerd,
/usr/bin/ods-enforcerd
  • opendnssec_tmp_t — Set files with the opendnssec_tmp_t type, if you want to store opendnssec temporary files in the /tmp directories.
  • opendnssec_unit_file_t — Set files with the opendnssec_unit_file_t type, if you want to treat the files as opendnssec unit content.

Paths:

/usr/lib/systemd/system/ods-signerd.service,
/usr/lib/systemd/system/ods-enforcerd.service
  • opendnssec_var_run_t — Set files with the opendnssec_var_run_t type, if you want to store the opendnssec files under the /run or /var/run directory.
  • opendnssec_var_t — Set files with the opendnssec_var_t type, if you want to store the opendn files under the /var directory. (yes, the page really says "opendn" there — copying it exactly, not my typo, i promise 😭)
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 = chcon, permanent = the whole semanage fcontext + restorecon combo, periodt 🔥

⭐ 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 like clicking 🖱️✨

🧚 AUTHOR 🧚

This manual page was auto-generated using sepolicy manpage . (so if anything's weird, blame the generator, not me 💀)

🌟 SEE ALSO 🌟

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

and that's the whole page bestie!! 🫶 mwah 💋

this little legend was brought to you by opendnssec, dated 26-10-06, living its best life at opendnssec_selinux(8) — go forth and label responsibly 👑

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