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docs: DHCP pool narrowed to .241-.254; ZimaOS IP drift documented

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- network.md: updated pool range, fixed 'below .100' claim, added changelog
- 107-dns.md: updated pool range, fixed 'below .100' claim, added changelog
- 100-zimaos.md: documented IP drift (.195→.103) and Caddy 502
- plan: .hermes/plans/2026-06-03_223218-dhcp-pool-exclude-static-ips.md

DHCP scope changed via Technitium API. No static IPs changed. Old leases
(.101-.110) expire naturally by 2026-06-04.
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authentik Default Admin
2026-06-03 22:50:33 +02:00
parent 4c4cfb56cd
commit edac189aa7
4 changed files with 257 additions and 5 deletions
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containers/107-dns.md
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@@ -34,12 +34,12 @@ Authoritative split-horizon DNS for `hubris.network` on the LAN/mesh, plus recur
## DHCP
Technitium also runs a DHCP server for the homelab subnet (enabled 2026-06-02):
- **Scope:** `homelab` — `192.168.8.100 – 192.168.8.240`
- **Scope:** `homelab` — `192.168.8.241 – 192.168.8.254`
- **Gateway:** `192.168.8.1` (Proxmox `vmbr0` alias)
- **DNS:** `192.168.8.2` (self)
- **Lease time:** 24 h
Replaces the DHCP that was previously served by the Slate AX router. Static-IP LXCs (below `.100`) are unaffected.
Replaces the DHCP that was previously served by the Slate AX router. Static-IP LXCs (`.101–.239`) are excluded from the pool. Pool narrowed from `.100–.240` to `.241–.254` on 2026-06-03 to eliminate IP conflict risk.
## Related
- [124 — authentik](124-authentik.md) — retired host of the old dnsmasq
@@ -48,6 +48,9 @@ Replaces the DHCP that was previously served by the Slate AX router. Static-IP L
## Changelog
### 2026-06-03 — DHCP pool narrowed to `.241–.254`
Previous pool `.100–.240` overlapped with all static LXCs/VMs (`.101–.239`). Shrunk via API (`/api/dhcp/scopes/set`). 11 stale DHCP leases in `.101–.110` remain until natural expiry (2026-06-04). See [plan](../plans/2026-06-03-dhcp-pool-exclude-static-ips.md).
### 2026-06-03 — dns-sync added (Technitium → NetBird managed zone)
This Technitium became the single DNS authoring source; `/opt/dns-sync/sync.py` (cron */10) reconciles named A-records into the NetBird managed zone via the API. Fixed previously-broken mesh names (`sso`, `nfs-export`, `mcp`, `secrets`) by adding them to the managed zone; reaped obsolete `files`/`photos-new`. See [dns.md](../infrastructure/dns.md).