# Network

Physical and logical network topology for the homelab.

## Why

The homelab runs on a dedicated subnet (`192.168.8.0/24`) isolated from the main household LAN (`192.168.178.0/24`). Isolation is enforced at the Fritz!Box level: homelab devices can reach the internet and main LAN can reach homelab services via explicit port forwards, but main LAN cannot initiate arbitrary connections into the homelab subnet.

## Hardware

| Device | Role |
|---|---|
| Fritz!Box 7590 | Main router / ISP gateway, VLAN router between subnets |
| SODOLA 5-Port 2.5Gbit Managed | Homelab switch, all ports in VLAN 10 |

## VLANs

| VLAN | Subnet | Gateway | Devices |
|---|---|---|---|
| 1 (native) | 192.168.178.0/24 | 192.168.178.1 | Household LAN — laptops, phones, APs |
| 10 | 192.168.8.0/24 | 192.168.8.1 | Homelab — Proxmox, all LXCs/VMs |

## Topology

```
ISP
 └── Fritz!Box 7590
      ├── VLAN 1  192.168.178.0/24  (main LAN)
      └── VLAN 10 192.168.8.0/24   (homelab)
           │
           └── SODOLA 5-Port 2.5Gbit
                ├── Port 1  uplink → Fritz!Box
                ├── Port 2  hubris (Proxmox, 192.168.8.77)
                ├── Port 3  [device]
                ├── Port 4  [device]
                └── Port 5  spare
```

## DHCP

Fritz!Box serves DHCP for both VLANs. For VLAN 10 homelab:
- Range: `192.168.8.100 – 192.168.8.240`
- DNS: `192.168.8.2` (Technitium on [CT 107](../containers/107-dns.md))

Most homelab hosts use static IPs below `.100` — DHCP only assigns to new/transient devices.

## DNS

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.

## Port forwarding

All inbound port forwards are on the Fritz!Box directly. The old double-hop (Fritz!Box → Slate AX → homelab) was eliminated when the Slate AX was retired. Target IPs are homelab addresses (`192.168.8.x`).

## Remote access

- **NetBird mesh** — primary path for remote administration. Authenticated via [Authentik on the VPS](../vps/).
- **Tailscale** — legacy, being phased out. See [mesh.md](mesh.md).

## Related

- [DNS](dns.md) — split-horizon config and entry list
- [Ingress](ingress.md) — public entry points via VPS traefik
- [Mesh](mesh.md) — NetBird / Tailscale VPN overlay
- [hosts/hubris.md](../hosts/hubris.md) — Proxmox host
- [CT 107 — dns](../containers/107-dns.md) — Technitium DNS server

## Changelog

### 2026-06-01 — Slate AX retired; SODOLA switch added; Fritz!Box becomes homelab gateway
Replaced the GL.iNet Slate AX sub-router with the SODOLA 5-Port 2.5Gbit managed switch. Fritz!Box 7590 now routes VLAN 10 (`192.168.8.0/24`) directly — no more double-NAT. Gateway `192.168.8.1` is unchanged so no LXC or VM needed reconfiguration. Fritz!Box DHCP for VLAN 10 now hands out `192.168.8.2` (Technitium) as DNS, resolving the outstanding "update router DHCP DNS" item. See [migration plan](../plans/2026-06-01-slate-ax-to-sodola-migration.md).