dtoro
edac189aa7
- 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.
88 lines
4.6 KiB
Markdown
88 lines
4.6 KiB
Markdown
# Network
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Physical and logical network topology for the homelab.
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## Why
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The homelab runs on a dedicated internal subnet (`192.168.8.0/24`) isolated from the main household LAN (`192.168.178.0/24`). Isolation is enforced at Proxmox: LXC/VM traffic is bridged only on the internal `vmbr0` bridge; Proxmox routes packets out to Fritz!Box via `vmbr1`. The main LAN cannot reach homelab services directly without a Fritz!Box static route (which is configured to allow inbound).
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Fritz!OS 8.x does not support second IP networks on LAN ports, so Proxmox (`hubris`) acts as the subnet router rather than the Fritz!Box.
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## Hardware
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| Device | Role |
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|---|---|
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| Fritz!Box 7590 | Main router / ISP gateway (`192.168.178.1`) |
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| SODOLA 5-Port 2.5Gbit Managed | Homelab switch — flat L2, all ports native |
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| hubris (Proxmox) | Subnet router — routes between `192.168.8.0/24` and `192.168.178.0/24` |
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## Topology
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```
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ISP
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└── Fritz!Box 7590 (192.168.178.1)
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│ static route: 192.168.8.0/24 → 192.168.178.10
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│
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└── SODOLA 5-Port 2.5Gbit
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├── Port 1 uplink → Fritz!Box LAN
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├── Port 2 hubris eno1 → vmbr1 (192.168.178.10)
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├── Port 3 [device]
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├── Port 4 [device]
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└── Port 5 spare
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hubris internal bridges:
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vmbr1 192.168.178.10/24 eno1 (uplink, DHCP-reserved) gateway 192.168.178.1
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vmbr0 192.168.8.77/24 no physical port (internal)
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192.168.8.1/24 alias — LXC default gateway
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├── all 16 LXCs
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└── HAOS VM
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```
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## Subnets
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| Subnet | Gateway | Purpose |
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|---|---|---|
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| `192.168.178.0/24` | `192.168.178.1` | Household LAN — laptops, phones, Fritz!Box DHCP |
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| `192.168.8.0/24` | `192.168.8.1` (Proxmox `vmbr0` alias) | Homelab — all LXCs and VMs |
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## DHCP
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- **Household (`192.168.178.x`)**: Fritz!Box built-in DHCP. Proxmox `vmbr1` has a reservation: MAC `84:47:09:6b:e7:58` → `192.168.178.10`.
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- **Homelab (`192.168.8.x`)**: Technitium on [CT 107](../containers/107-dns.md) at `192.168.8.2`. Range `192.168.8.241–192.168.8.254`, gateway `192.168.8.1`, DNS `192.168.8.2`.
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Static IPs span `.101–.239` (all LXCs, VMs, and workstations). DHCP pool narrowed to `.241–.254` (2026-06-03) to avoid overlap and IP conflicts.
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## DNS
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Split-horizon DNS for `*.hubris.network` served by Technitium on [CT 107](../containers/107-dns.md) at `192.168.8.2:53`. See [dns.md](dns.md) for full detail.
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## Routing
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Proxmox has `net.ipv4.ip_forward=1` (already enabled by PVE). Packets from LXCs on `vmbr0` destined for the internet exit via `vmbr1` → Fritz!Box. Fritz!Box masquerades all outbound WAN traffic. Fritz!Box has a static route (`192.168.8.0/24 → 192.168.178.10`) so return traffic reaches the LXCs.
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No NAT on Proxmox — traffic flows without double-NAT.
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## Remote access
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- **NetBird mesh** — primary path for remote administration. Authenticated via [Authentik on the VPS](../vps/).
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- **Tailscale** — legacy, being phased out. See [mesh.md](mesh.md).
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## Related
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- [DNS](dns.md) — split-horizon config and entry list
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- [Ingress](ingress.md) — public entry points via VPS traefik
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- [Mesh](mesh.md) — NetBird / Tailscale VPN overlay
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- [hosts/hubris.md](../hosts/hubris.md) — Proxmox host (vmbr0/vmbr1 config)
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- [CT 107 — dns](../containers/107-dns.md) — Technitium DNS + DHCP server
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## Changelog
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### 2026-06-03 — DHCP pool narrowed to `.241–.254`
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Previous pool `.100–.240` overlapped with all static LXCs/VMs (` .101–.239`), creating IP conflict risk (DHCP could hand out an IP that a static service expects). Shrunk pool to `.241–.254` via Technitium API. No services re-IP'd. 11 stale DHCP leases in `.101–.110` will expire naturally. **Open:** ZimaOS (VM 100) holds DHCP lease `.103` but inventory expects `.195` — needs static IP set inside VM. See [plan](../plans/2026-06-03-dhcp-pool-exclude-static-ips.md).
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### 2026-06-02 — Executed migration; Proxmox as subnet router
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Fritz!OS 8.x does not support second IP networks on LAN ports, so the final design uses Proxmox as the router: `vmbr1` (eno1 → SODOLA → Fritz!Box) is the uplink at `192.168.178.10`; `vmbr0` is a portless internal bridge with `192.168.8.1` alias as the LXC gateway. Technitium DHCP enabled for `192.168.8.100–240`. Caddy service unit was missing and recreated. See [migration plan](../plans/2026-06-01-slate-ax-to-sodola-migration.md).
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### 2026-06-01 — Initial network doc; Slate AX retired; SODOLA switch added
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Replaced the GL.iNet Slate AX sub-router with the SODOLA 5-Port 2.5Gbit managed switch. Eliminated double-NAT. See [migration plan](../plans/2026-06-01-slate-ax-to-sodola-migration.md).
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