# Accessing the Homelab During an Internet Outage

**When your internet goes down, the homelab keeps running.** This guide covers exactly how to reach each service via LAN or Tailscale (which uses peer-to-peer WireGuard — it continues working between nodes that already have keys exchanged, even without the coordination server).

---

## Quick Reference — What Still Works

| Category | Services | Access Method |
|----------|----------|---------------|
| **Streaming** | Plex, Jellyfin, Audiobookshelf | LAN IP or Tailscale IP |
| **Media mgmt** | Sonarr, Radarr, SABnzbd, Prowlarr | LAN IP or Tailscale IP |
| **Photos** | Immich (Atlantis + Calypso) | LAN IP or Tailscale IP |
| **Documents** | Paperless-NGX | LAN IP or Tailscale IP |
| **Passwords** | Vaultwarden | LAN IP or Tailscale IP |
| **Files** | Seafile, Syncthing | LAN IP or Tailscale IP |
| **Notes** | Joplin, BookStack | LAN IP or Tailscale IP |
| **Git/CI** | Gitea, Portainer | LAN IP or Tailscale IP |
| **Monitoring** | Grafana, Prometheus, Uptime Kuma | LAN IP or Tailscale IP |
| **Home Auto** | Home Assistant | LAN IP or Tailscale IP |
| **Dashboard** | Homarr | LAN IP or Tailscale IP |
| **Finance** | Actual Budget | LAN IP or Tailscale IP |
| **Comms** | Mattermost, Matrix (local rooms) | LAN IP or Tailscale IP |
| **Auth** | Authentik SSO | LAN IP or Tailscale IP (fully local) |

**What does NOT work without internet:**
- New downloads (Sonarr/Radarr can't search indexers, SABnzbd can't download)
- Invidious, Piped, Redlib (they ARE the internet)
- YourSpotify, ProtonMail Bridge
- External access via `*.vish.gg` domains (Cloudflare proxy down)
- iOS push notifications via ntfy (ntfy.sh upstream unavailable)
- AI tagging in Hoarder (OpenAI API)

---

## Access Methods

### Method 1 — LAN (same network as Atlantis/Calypso)

You must be physically connected to the home network (Ethernet or WiFi).

| Host | LAN IP | Notes |
|------|--------|-------|
| Atlantis | `192.168.0.200` | Primary NAS — most services |
| Calypso | `192.168.0.250` | Secondary NAS — Gitea, Authentik, Paperless, Immich |
| Homelab VM | `192.168.0.X` | Check router DHCP — runs monitoring, Mattermost |
| Concord NUC | `192.168.0.X` | Check router DHCP |
| Pi-5 | `192.168.0.66` | Uptime Kuma, Glances |
| Guava (TrueNAS) | `192.168.0.100` | NAS shares |
| Home Assistant | `192.168.12.202` (behind MT3000) | HA Green |

### Method 2 — Tailscale / Headscale (any network, any location)

Tailscale uses WireGuard peer-to-peer. **Once nodes have exchanged keys, they communicate directly without needing the coordination server (headscale on Calypso).** An internet outage does not break existing Tailscale sessions.

| Host | Tailscale IP | SSH Alias |
|------|-------------|-----------|
| Atlantis | `100.83.230.112` | `atlantis` |
| Calypso | `100.103.48.78` | `calypso` |
| Homelab VM | `100.67.40.126` | `homelab-vm` |
| Concord NUC | `100.72.55.21` | `nuc` |
| Pi-5 | `100.77.151.40` | `pi-5` |
| Guava | `100.75.252.64` | `guava` |
| Moon | `100.64.0.6` | `moon` |
| Setillo | `100.125.0.20` | `setillo` |
| Seattle VPS | `100.82.197.124` | `seattle-tailscale` |

**MagicDNS** also works on Tailscale: `atlantis.tail.vish.gg`, `calypso.tail.vish.gg`, etc.

> **Note:** If headscale itself needs to restart during an outage, it will now start fine (fixed 2026-03-16 — `only_start_if_oidc_is_available: false`). Existing node sessions survive a headscale restart indefinitely.

---

## Service Access Cheatsheet

### Portainer (container management)
```
LAN:       http://192.168.0.200:10000
Tailscale: http://100.83.230.112:10000
Public:    https://pt.vish.gg  ← requires internet
```

### Gitea (code repos, CI/CD)
```
LAN:       http://192.168.0.250:3052
Tailscale: http://100.103.48.78:3052  or  http://calypso.tail.vish.gg:3052
Public:    https://git.vish.gg  ← requires internet (Cloudflare proxy)
```
> GitOps still works during outage — Portainer pulls from `git.vish.gg` which resolves to Calypso on LAN.

### Plex
```
LAN:       http://192.168.0.200:32400/web
Tailscale: http://100.83.230.112:32400/web
Note:      Plex account login may fail (plex.tv unreachable) — use local account
```

### Jellyfin
```
LAN:       http://192.168.0.200:8096
Tailscale: http://100.83.230.112:8096
```

### Immich (Atlantis)
```
LAN:       http://192.168.0.200:8212
Tailscale: http://atlantis.tail.vish.gg:8212
```

### Immich (Calypso)
```
LAN:       http://192.168.0.250:8212
Tailscale: http://calypso.tail.vish.gg:8212
```

### Paperless-NGX
```
LAN:       http://192.168.0.250:8777
Tailscale: http://100.103.48.78:8777
Public:    https://docs.vish.gg  ← requires internet
SSO:       Still works (Authentik is local)
```

### Vaultwarden
```
LAN:       http://192.168.0.200:4080
Tailscale: http://100.83.230.112:4080
Public:    https://pw.vish.gg  ← requires internet
Note:      Use local login (password + security key) — SSO still works too
```

### Homarr (dashboard)
```
LAN:       http://192.168.0.200:7575
Tailscale: http://100.83.230.112:7575
Note:      Use credentials login if SSO is unavailable
```

### Actual Budget
```
LAN:       http://192.168.0.250:8304
Tailscale: http://100.103.48.78:8304
Public:    https://actual.vish.gg  ← requires internet
Note:      Password login available (OIDC also works since Authentik is local)
```

### Hoarder
```
Tailscale: http://100.67.40.126:3000  (homelab-vm)
Public:    https://hoarder.thevish.io  ← requires internet
```

### Grafana
```
LAN:       http://192.168.0.200:3300
Tailscale: http://100.83.230.112:3300
Public:    https://gf.vish.gg  ← requires internet
```

### Authentik SSO
```
LAN:       http://192.168.0.250:9000
Tailscale: http://100.103.48.78:9000
Public:    https://sso.vish.gg  ← requires internet
Note:      Fully functional locally — all OIDC flows work without internet
```

### Home Assistant
```
LAN:       http://192.168.12.202:8123  (behind GL-MT3000)
Tailscale: http://homeassistant.tail.vish.gg  (via Tailscale)
Note:      Automations and local devices work; cloud integrations may fail
```

### Guava SMB shares (Windows)
```
LAN:       \\192.168.0.100\<sharename>
Note:      Credentials stored in Windows Credential Manager
           User: vish  (see Vaultwarden if password needed)
```

### Uptime Kuma
```
LAN:       http://192.168.0.66:3001  (Pi-5)
Tailscale: http://100.77.151.40:3001
```

### Sonarr / Radarr / Arr suite
```
LAN:       http://192.168.0.200:<port>
           Sonarr:    8989    Radarr:    7878
           Lidarr:    8686    Prowlarr:  9696
           Bazarr:    6767    SABnzbd:   8880
Tailscale: http://100.83.230.112:<port>
Note:      Can still manage library, mark as watched, etc.
           New downloads fail (no indexer access without internet)
```

---

## SSH Access During Outage

All hosts have SSH key-based auth. From any machine on LAN or Tailscale:

```bash
# Atlantis (Synology DSM)
ssh -p 60000 vish@192.168.0.200        # LAN
ssh atlantis                            # Tailscale (uses ~/.ssh/config)

# Calypso (Synology DSM)
ssh -p 62000 Vish@192.168.0.250        # LAN  (capital V)
ssh calypso                             # Tailscale

# Homelab VM
ssh homelab@100.67.40.126              # Tailscale only (no LAN port forward)

# Concord NUC
ssh nuc                                 # Tailscale

# Pi-5
ssh pi-5                                # Tailscale (vish@100.77.151.40)

# Guava (TrueNAS)
ssh vish@192.168.0.100                 # LAN
ssh guava                               # Tailscale

# Moon (remote)
ssh moon                                # Tailscale only (100.64.0.6)
```

---

## NPM / Reverse Proxy

NPM runs on Calypso (`192.168.0.250`, port 81 admin UI). During an internet outage, NPM itself keeps running and continues to proxy internal traffic. SSL certs remain valid for up to 90 days — cert renewal requires internet (Let's Encrypt + Cloudflare DNS).

For LAN access you don't go through NPM at all — use the direct host:port addresses above.

---

## Tailscale Not Working?

If Tailscale connectivity is lost during an outage:

1. **Check if headscale is up on Calypso:**
   ```bash
   ssh -p 62000 Vish@192.168.0.250 "sudo /usr/local/bin/docker ps | grep headscale"
   ```

2. **Restart headscale if needed** (it will start even without internet now):
   ```bash
   ssh -p 62000 Vish@192.168.0.250 "sudo /usr/local/bin/docker restart headscale"
   ```

3. **Force re-auth on a node:**
   ```bash
   sudo tailscale up --login-server=https://headscale.vish.gg:8443
   # headscale.vish.gg resolves via LAN since it's unproxied (direct home IP)
   ```

4. **If headscale.vish.gg DNS fails** (DDNS not updated yet), use the direct IP:
   ```bash
   sudo tailscale up --login-server=http://192.168.0.250:8080
   ```

---

## DDNS / External Access Recovery

When internet comes back after an outage, DDNS updaters on Atlantis automatically update Cloudflare within ~5 minutes. No manual action needed.

If your external IP changed during the outage and you need to update manually:
```bash
# Check current external IP
curl https://ipv4.icanhazip.com

# Check what Cloudflare has for a domain
dig +short headscale.vish.gg A

# If they differ, restart the DDNS updater on Atlantis to force immediate update
ssh atlantis "sudo /var/packages/REDACTED_APP_PASSWORD/usr/bin/docker restart \
  dyndns-updater-stack-ddns-vish-unproxied-1 \
  dyndns-updater-stack-ddns-vish-proxied-1 \
  dyndns-updater-stack-ddns-thevish-proxied-1 \
  dyndns-updater-stack-ddns-thevish-unproxied-1"
```

---

## Related Docs

- [Common Issues](common-issues.md) — Tailscale routing, SMB problems
- [Guava SMB Incident](guava-smb-incident-2026-03-14.md) — Tailscale subnet route issues
- [Offline Password Access](offline-password-access.md) — If Vaultwarden itself is down
- [Disaster Recovery](disaster-recovery.md) — Full hardware failure scenarios
- [SSO/OIDC Status](../admin/sso-oidc-status.md) — Which services have local login fallback

---

**Last updated:** 2026-03-16
