* refactor(nixpak): split policy checks into per-app suites
Make hardening/tests/policy.nix a small loader that auto-discovers one suite per app under hardening/tests/policy. Shared checks live in policy-lib.nix and common expectations are generated by mkAppPolicy; app files only declare differences and special cases. The loader also discovers wrappers from hardening/nixpaks and fails when wrapper/suite inventory or check names diverge.
Assisted-by: DeepSeek Harness (deepseek-flash)
* fix(nixpak): reject duplicate per-app policy checks
mkAppPolicy merges generated and custom checks, so an extraChecks key could silently override a standard assertion. Fail explicitly when a per-app check name is defined twice.
Assisted-by: DeepSeek Harness (deepseek-flash)
WeChat and QQ now use native Wayland, so the X11/Wayland clipboard bridge
is no longer needed. Remove the flake input, home-manager module wiring,
lock entries, and stale documentation reference.
Assisted-by: DeepSeek Harness (deepseek-flash)
Merge the three runtime-validation files into one concise record, update the interactive browser and Zoom results, and document the intentional Chromium host-loopback and Brave/Edge no-media exceptions. Tighten the remaining cookie-crypto workaround and the smoke-test prerequisites.
Assisted-by: DeepSeek Harness (deepseek-flash)
Switch to the native deb package from nixpkgs-patched (#560225), remove the AppImage/FHS bwrap layer, and enable native Wayland while keeping the X11 fallback.
Keep only WeChat state under one app-scoped HOME and bind the host Documents and Downloads directories like the other desktop apps. User-selected files also go through the XDG FileChooser portal. Remove the launcher, activation script, and compatibility symlinks.
Assisted-by: DeepSeek Harness (deepseek-flash)
* refactor(nixpak): unify desktop app sandboxes
Move common GUI, portal, and network policy into reusable modules and migrate browsers plus Zoom/WeChat/QQ/Telegram to the same boundary.
Assisted-by: DeepSeek Harness (deepseek-flash)
* fix(nixpak): stop exposing the system D-Bus to apps
* fix(nixpak): bind only the PulseAudio socket
* feat(nixpak): run apps in a new session tied to the launcher
* feat(nixpak): start apps from an allowlisted environment
* feat(nixpak): isolate app networking with pasta
* fix(nixpak): keep Firefox on the host network
Assisted-by: Claude Code (claude-opus-5-5)
nixpkgs' transmission 4.1.4 profile grants rw on the daemon's config directory
but not k, while 4.1.4 takes a fcntl lock on
~/.config/transmission-daemon/lock, so the daemon exited at startup with
"Another process is already using". Include rwk for that one file only.
WA-044, drop once the nixpkgs profile carries the permission.
Assisted-by: Claude Code (claude-opus-5-5)
NixOS copies mode-carrying /etc entries such as authorized_keys.d during
stage-2 activation, which runs before systemd starts. preservation mounted the
persisted /etc/ssh from preservation.target afterwards and hid that copy, so a
key change only took effect on `switch`: revoking a key and rebooting silently
restored the old one.
Prepare the mount in initrd, before activation runs, and cover it with a VM
test that seeds a stale authorized_keys file, reboots, and asserts the declared
key replaced it. The same test fails on that assertion with inInitrd disabled.
Verified on all four hosts: /persistent/etc/ssh/authorized_keys.d/root is now
rewritten at boot instead of keeping the timestamp of the last switch.
Assisted-by: Claude Code (claude-opus-5-5)
The homelab hosts accept root SSH with long-lived file keys, run several
exposed services with almost no systemd sandboxing, and keep no audit trail of
privileged actions. Close those three gaps, weighing each measure against its
cost instead of adopting a policy wholesale.
SSH
- Turn off KbdInteractiveAuthentication: nixpkgs defaults it to true and PAM
then still accepts the Unix password despite PasswordAuthentication = false.
- authorizedKeysInHomedir = false: only keys declared in Nix take effect;
youko keeps Gitea's forced-command file through `Match User gitea`.
- Pin aquamarine's passphrase-free remote-builder keys to
`restrict,command="nix-daemon --stdio --store daemon"`, so builds run in the
system daemon instead of an audited root login session.
systemd sandboxing
- Add the mylib.systemdHardening preset and apply it to the exposed, weakly
sandboxed services: caddy 7.8 -> 1.5, vmalert 8.2 -> 1.4, rustfs 6.6 -> 1.4,
whisper-asr 7.7 -> 1.6. An eval test pins the key restrictions.
- Rejected: a global all-keys policy (<=0.2 score gains on services nixpkgs
already sandboxes) and per-service confinement (bind paths to maintain).
auditd on all four hosts, reusing nixpkgs' loader and unit
- Audit login sessions only: a first `-a never,task -F auid=unset` rule keeps
services out of the per-syscall audit path. A compromised service is
therefore unrecorded until it opens a session.
- Record root commands, credential and host-key access, writes to SSH, account,
PAM, Nix-trust and audit configuration, module loads and session denials.
- Rejected: global denial logging, service-UID watches and
--loginuid-immutable (the kernel already records loginuid changes).
Verified on all four hosts after deployment: zero failed units, k3s 6/6 Ready,
and the exposed services healthy.
Assisted-by: Claude Code (claude-opus-5-5)
Turn on adaptive sync at the output only when a game window opts in, keeping desktop compositing fixed-rate to avoid idle/low-load VRR flicker. The Steam/Proton game rule enables VRR alongside the fullscreen rule.
Assisted-by: DeepSeek Harness (deepseek-flash)
XWayland/Proton windows can commit before they set a title. Excluding empty titles made Phantom Blade Zero miss the fullscreen rule and stay composited. Keep excluding the launcher announcement popup by title.
VRR is intentionally not enabled here: on-demand VRR caused display corruption in this game and is tracked separately.
Assisted-by: DeepSeek Harness (deepseek-flash)
* chore(nix): update nixpkgs to e62746b and fix 26.11 breakage
Bump nixpkgs to e62746b and preservation to 00be7f7, then adapt to the removals and renamed options in the new revision: drop the removed boot.initrd.systemd.enable settings, trim the stale emSign CA blacklist on Linux while keeping it for the older Darwin input, and migrate Avahi publishing to settings.publish. Work around sunshine still setting the legacy Avahi options and keep dsh-nu on its tested Nushell 0.115.1. Patch NUR dsh's pnpm call to pass nodejs = null, and update pyclipsync for the stdenv.hostPlatform.system rename.
* chore(nix): refresh flake inputs for 26.11
- update nixpkgs-darwin to the same e62746b revision as nixpkgs
- make dsh-nu follow main nixpkgs and patch its testedWith manifest for the resolved Nushell
- refresh floating inputs; update lanzaboote, tuios, and ponytail
- drop the nixpkgs-2505 and rust-overlay workarounds
- keep pyclipsync on main and simplify the cross-platform CA blacklist
- adopt home-manager's Nushell loadSessionVariables default
* fix(gitea): use ROOT_URL for nixpkgs 26.11
nixpkgs removed the legacy settings.server.DOMAIN option; the existing ROOT_URL already carries the public URL.
* chore(nix): update dsh-nu to 0.7.0
Assisted-by: DeepSeek Harness (deepseek-flash)
Clarify that minimality means the smallest best-practice change, not a local patch around an upstream defect.
Assisted-by: DeepSeek Harness (deepseek-flash)
The nvidia exporter binds the host's static LAN IPv4, but unlike the node and smartctl exporters it was not ordered after network-online.target. On boot it lost the race with networkd, hit the systemd start limit, and stayed failed until manually restarted.
Update the mysecrets lock to 7f93490, which renames secrets.nix to agenix-rules.nix, drops the deprecated ./ key prefixes for agenix 0.18, and re-encrypts the access-token secret. Update the docs and agenix skill to the new filename and path convention.
k8s-gitops#54 merged and reconciled, a full cold start of all six guests
brought the VIP back without manual action, and a probe from a pod shows
2379 denied while 2381 stays open. SECURITY.md records the fix and the
probe; the workaround row and its TODO entry are gone.
Assisted-by: DeepSeek Harness (gpt-6-astra)
Baseline sysctls, exporter binds and the #399/#400/#401 rules verified
live on 13 hosts; kiali self-escalation and the list-vs-get probe blind
spot recorded; WA-043 registers the k3s-test-1 Cilium/kube-vip bootstrap
cycle (WA-040 is the Root CA blacklist row); the TODO table gains the
cluster-recovery line. The same section records the manual recovery and
its fix in k8s-gitops, plus the 2026-10-24 full cold start that brought
the VIP back without manual action; WA-043 drops when #54 merges.
Assisted-by: DeepSeek Harness (gpt-6-astra)
The 2026-10-22 audit found the live socket on *:9835: #373 bound
node/smartctl in monitoring.nix, but the nvidia exporter enabled in
hardware-nvidia.nix kept the nixpkgs default, so the socket-level
defence-in-depth layer never existed for 9835.
Extend the security-exporters eval check to every enabled exporter's
listenAddress so a future exporter without a bind fails the test.
Assisted-by: DeepSeek Harness (gpt-6-astra)
The etcd client API listens on the masters' static LAN address, and the
pod-source deny lists omitted it. Add 2379 to both nft drop lines and
assert it in the security-k3s-pod-firewall eval test. 2381 (etcd
metrics, scraped by in-cluster monitoring) stays reachable by design.
Pairs with the matching Cilium egressDeny port in k8s-gitops.
Assisted-by: DeepSeek Harness (gpt-6-astra)
Nothing imported it and the riscv64 output was already commented out; riscv64 hosts live in ryan4yin/nixos-config-sbc.
Assisted-by: DeepSeek Harness 0.2.1-rc.2 (deepseek-flash)
The backup unit publishes `restic_backup_last_success_timestamp_seconds` for the node_exporter textfile collector, and a rejected alert now fails the notify unit instead of exiting 0.
Assisted-by: DeepSeek Harness 0.2.1-rc.2 (deepseek-flash)
Reading the host's install script evaluated each guest, which pulls the private secrets input, so
CI could not evaluate the suite at all.
Assisted-by: DeepSeek Harness 0.2.1-rc.2 (deepseek-flash)
Ryan Yin
ryan4yin | 二花