virtnwfilterd_selinux(8)

💖 virtnwfilterd_selinux(8) 💖

okay bestie, welcome to the virtnwfilterd_selinux page — that's section 8 of the manual, and it's literally all about the SELinux policy for the virtnwfilterd processes. grab a snack, we're getting into it 🍓

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✨ NAME ✨

virtnwfilterd_selinux — the Security Enhanced Linux Policy for the virtnwfilterd processes. that's it, that's the whole name section. iconic.

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🦋 DESCRIPTION 🦋

so, Security-Enhanced Linux secures the virtnwfilterd processes via flexible mandatory access control. yes ma'am, mandatory. not vibes-based, actually enforced 💅

the virtnwfilterd processes execute with the virtnwfilterd_t SELinux type. you can check if you've got these processes running by executing the ps command with the -Z qualifier.

for example:

ps -eZ | grep virtnwfilterd_t

go off, ps. 🫶

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🚪 ENTRYPOINTS 🚪

the virtnwfilterd_t SELinux type can be entered via the virtnwfilterd_exec_t file type.

the default entrypoint paths for the virtnwfilterd_t domain are:

/usr/bin/virtnwfilterd

one path. one legend. that's the door, bestie 🚪✨

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👑 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. the SELinux virtnwfilterd policy is very flexible, allowing users to setup their virtnwfilterd processes in as secure a method as possible. highkey obsessed with how configurable this is.

the following process types are defined for virtnwfilterd:

• virtnwfilterd_t

Note: semanage permissive -a virtnwfilterd_t can be used to make the process type virtnwfilterd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it's chill about it now, but it's still watching 👀 — those AVC messages keep coming, no cap.

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🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. the virtnwfilterd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run virtnwfilterd with the tightest access possible. tightest access possible is the aesthetic, fr fr 🔥

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

two booleans, both already on. we love a low-effort slay ✨

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📁 MANAGED FILES 📁

the SELinux process type virtnwfilterd_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 — SELinux can't cover for that, bestie, that's not its job.

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

root_t

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

(yes, / is in there. it's giving main character energy. of course the root directory made the list 💀)

virt_log_t

/var/log/log(/.*)?
/var/log/vdsm(/.*)?
/var/log/libvirt(/.*)?
/var/log/virtqemud.log
/var/log/virtproxyd.log
/var/log/virtsecretd.log
/var/log/virtnetworkd.log
/var/log/virtnodedevd.log
/var/log/virtstoraged.log
/var/log/virtnwfilterd.log
/var/log/virtinterfaced.log
/run/lock/xl

look at all those virt*d log files. a whole friend group. virtnwfilterd.log is in there too, obviously, it said "not me being logged" 😭

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🗂️ 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. the SELinux virtnwfilterd policy is very flexible, allowing users to setup their virtnwfilterd processes in as secure a method as possible.

🌈 STANDARD FILE CONTEXT 🌈

SELinux defines the file context types for the virtnwfilterd. 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 virtnwfilterd_var_run_t '/srv/virtnwfilterd/content(/.*)?'
restorecon -R -v /srv/myvirtnwfilterd_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies rise 🙈

the following file types are defined for virtnwfilterd:

virtnwfilterd_exec_t

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

virtnwfilterd_t

• Set files with the virtnwfilterd_t type, if you want to treat the files as virtnwfilterd data.

virtnwfilterd_var_run_t

• Set files with the virtnwfilterd_var_run_t type, if you want to store the virtnwfilterd files under the /run or /var/run directory.

Paths:

/run/libvirt/nwfilter(/.*)?, /run/libvirt/nwfilter-binding(/.*)?,
/run/virtnwfilterd.pid, /run/virtnwfilterd-binding.pid,
/run/libvirt/virtnwfilterd-sock, /run/libvirt/virtnwfilterd-sock-
ro, /run/libvirt/virtnwfilterd-admin-sock

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. chcon is giving temporary-fix energy, semanage fcontext is the committed relationship 💜

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🛠️ 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.

that's the whole toolbox. semanage really said "I contain multitudes" 💅

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✍️ AUTHOR ✍️

this manual page was auto-generated using sepolicy manpage. a robot wrote this. and honestly? it ate. 🤖✨

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👀 SEE ALSO 👀

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

like, go read those too. iykyk 🦋

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and that's the page, bestie!! 🎉 this one came from the virtnwfilterd source, dated 26-10-06, and yes — the version string is literally virtnwfilterd and the page name is virtnwfilterd_selinux(8), matching right back up top. mwah 💋 slay, go secure some processes 🫶💖