systemd sandbox scores

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systemd-analyze security, every IbexWall unit

Measured by the packaging phase of the VM matrix (cargo xtask vm-test --phase f10) on Fedora with the installed packages, 2026-11-06. A lower number is a tighter sandbox: below 4 is rated OK by systemd, 4 to 6 MEDIUM, 6 to 9 EXPOSED, above 9 UNSAFE. The score depends on the systemd version, so another distribution can differ by a few tenths. It is documented, not a gate.

The daemon and the services it starts:

ibexwall-dns-failsafe.service: 1.8 OK
ibexwall-dns.service: 1.4 OK
ibexwall-mcp-reload.service: 1.7 OK
ibexwall-mcp.service: 1.7 OK
ibexwall-monitor.service: 2.8 OK
ibexwalld.service: 2.7 OK

The plugins, one unit each (a dynamic user, only the capabilities the manifest declares, a read-only system, no network unless declared):

32 plugin units, from 1.6 to 2.2, all rated OK:

ibexwall-plugin-accounts.service: 1.8 OK
ibexwall-plugin-assistant.service: 1.8 OK
ibexwall-plugin-audit.service: 1.8 OK
ibexwall-plugin-av.service: 1.8 OK
ibexwall-plugin-camera-mic.service: 2.1 OK
ibexwall-plugin-coredump.service: 1.6 OK
ibexwall-plugin-cves.service: 2.2 OK
ibexwall-plugin-dns.service: 1.6 OK
ibexwall-plugin-exposure.service: 1.6 OK
ibexwall-plugin-firewall.service: 1.8 OK
ibexwall-plugin-firmware.service: 1.6 OK
ibexwall-plugin-flatpak-network.service: 1.6 OK
ibexwall-plugin-flatpak-perms.service: 1.9 OK
ibexwall-plugin-hardening.service: 1.6 OK
ibexwall-plugin-integrity.service: 1.8 OK
ibexwall-plugin-isolate.service: 1.6 OK
ibexwall-plugin-modules.service: 1.6 OK
ibexwall-plugin-mounts.service: 1.6 OK
ibexwall-plugin-nts.service: 1.8 OK
ibexwall-plugin-openscap.service: 1.8 OK
ibexwall-plugin-persistence.service: 1.9 OK
ibexwall-plugin-ports.service: 1.6 OK
ibexwall-plugin-posture.service: 1.8 OK
ibexwall-plugin-rootkit.service: 1.8 OK
ibexwall-plugin-session-lock.service: 1.9 OK
ibexwall-plugin-ssh.service: 1.8 OK
ibexwall-plugin-sysctl.service: 1.6 OK
ibexwall-plugin-telemetry.service: 1.6 OK
ibexwall-plugin-updates.service: 1.6 OK
ibexwall-plugin-usb.service: 1.8 OK
ibexwall-plugin-vpn.service: 1.6 OK
ibexwall-plugin-wifi.service: 1.8 OK

The outside scanners run as root over a read-only system because they must read most of it: they are not in the packaged set until the person starts a scan, and their transient or installed scan units (ibexwall-rootkit-scan, ibexwall-openscap-scan, ibexwall-exposure-scan, ibexwall-av-scan) rate poorly by design (rkhunter about 9.0, OpenSCAP about 8.2). The units keep the system read-only and write only to their own state directory.