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doc: make every LAN instance static, record the FTTH fallout

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Follow-up to a7f1ac6. The Archer C7's DHCP reservations did not carry
over to the FTTH box, so anything still on DHCP was one lease renew away
from moving — as blocky already demonstrated by taking LAN DNS with it.
jellyfin-server and jellyfin-client are now static too; homeassistant
stays dynamic on purpose (it never had a reservation).

Records three things that cost time to find:

- jellyfin-client can never use netplan: the kiosk raw.lxc bind-mounts
  the host /run/udev read-only, so netplan generate fails and config
  silently does not regenerate at boot. It uses systemd-networkd now.
- LAPTOP719974 and patate also lost their reserved addresses.
- ks4 cannot serve as an IPv6 exit: it has a global v6 address and a
  default v6 route but no working v6 egress, so extending the torrent
  tunnel to ::/0 is not an option. IPv6 stays disabled in the container.

Also notes the C7 + LTE box kept as fallback: only the gateway differs.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Julien Lutran
2026-09-16 10:33:17 +02:00
co-authored by Claude Opus 5
parent a7f1ac691e
commit 7e6b8f2848
2 changed files with 46 additions and 22 deletions
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nas/README.md
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@@ -34,7 +34,7 @@ Storage + backup host on the LAN, added 2026-08.
|---|---|---|---|
| blocky | 192.168.0.254 | — | unprivileged, autostart; DNS ad-blocker for the LAN. Moved from nuc 2026-08-30 so it survives nuc being powered off |
| privoxy | 192.168.0.11 | — | unprivileged, autostart; filtering HTTP proxy, listens on **:3128** (not privoxy's default 8118); static config in `/etc/systemd/network/eth0.network` (`Gateway=192.168.0.1`), `DNS=192.168.0.254`. Moved from nuc 2026-08-30 |
| [transmission-bt](transmission-bt.md) | 192.168.0.7 | ✅ | unprivileged, autostart; always-on WireGuard full tunnel → ks4 (egress = 193.70.35.17, kill switch: no default route in `main`, wg-quick's `fwmark`/`suppress_prefixlength` rules send traffic to table 51820 — **`netplan apply` wipes those rules, so always `systemctl restart wg-quick@wg0` after it**); **IPv6 disabled** (`/etc/sysctl.d/99-no-ipv6.conf`) since the tunnel is `AllowedIPs = 0.0.0.0/0` only and the FTTH box's native IPv6 RA bypassed the kill switch entirely; `/export/media` disk device (`shift=true`), downloads to `/media/downloads`; web UI :9091 (LAN only). Moved from nuc 2026-08-30 |
| [transmission-bt](transmission-bt.md) | 192.168.0.7 | ✅ | unprivileged, autostart; always-on WireGuard full tunnel → ks4 (egress = 193.70.35.17, kill switch: no default route in `main`, wg-quick's `fwmark`/`suppress_prefixlength` rules send traffic to table 51820 — **`netplan apply` wipes those rules, so always `systemctl restart wg-quick@wg0` after it**); **IPv6 disabled** (`/etc/sysctl.d/99-no-ipv6.conf`) since the tunnel is `AllowedIPs = 0.0.0.0/0` only and the FTTH box's native IPv6 RA bypassed the kill switch entirely. Extending the tunnel to `::/0` is **not currently possible**: ks4 has a global v6 address and a default v6 route but **no working v6 egress** (verified 2026-09-16 — both ICMP and TCP to the v6 internet fail while v4 is fine), so it cannot act as a v6 exit. Fix OVH v6 on ks4 first if v6 peers are ever wanted; `/export/media` disk device (`shift=true`), downloads to `/media/downloads`; web UI :9091 (LAN only). Moved from nuc 2026-08-30 |
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