funnel-config
Manage Tailscale Funnel routes. Use when configuring tunnels or external HTTPS access.
What this skill does
# Tailscale Funnel Route Management
## Discover Current State
```bash
# Get hostname
tailscale status --json | jq -r '.Self.DNSName' | sed 's/\.$//'
# List all routes
tailscale funnel status
# Check what's listening on which ports
lsof -i -P -n | grep LISTEN | grep -E ':(8080|3000|3030|5000)'
```
## Add a Service Route
```bash
# Root path (only one service can own /)
tailscale funnel --bg <port>
# Sub-path (multiple can coexist)
tailscale serve --bg --set-path /<path> http://localhost:<port>
```
**Rule:** Routes coexist. Adding a root route does NOT remove sub-path routes. Adding a sub-path does NOT remove the root route.
## Remove a Route
```bash
# Remove root
tailscale funnel --https=443 off
# Remove a sub-path
tailscale serve --https=443 --set-path /<path> off
```
## Health Check
After any route change, verify both local and external:
```bash
HOSTNAME=$(tailscale status --json | jq -r '.Self.DNSName' | sed 's/\.$//')
# Local
curl -s --max-time 5 http://127.0.0.1:<port>/health
# External (proves funnel works end-to-end)
curl -s --max-time 10 "https://${HOSTNAME}/<path>" -o /dev/null -w "%{http_code}\n"
```
## Troubleshooting
| Symptom | Cause | Fix |
|---------|-------|-----|
| External returns nothing | Funnel not active | `tailscale funnel --bg <port>` |
| External returns 502 | Service not running on that port | Start the service, check `lsof -i :<port>` |
| Route disappeared after restart | Funnel routes persist, but `tailscale serve` routes may not | Re-add with `tailscale serve --bg --set-path ...` |
| New route killed existing service | Won't happen — routes coexist | Verify with `tailscale funnel status` |
| GitHub webhooks not arriving | Hostname mismatch or funnel off | Check `tailscale funnel status`, compare with webhook URL |
## Principles
- One service per path. Never route two services to the same path.
- Prefer sub-paths for non-primary services to avoid root conflicts.
- Always verify with external curl after changes — local success doesn't prove funnel works.
- Funnel requires Tailscale Funnel to be enabled on the tailnet (ACL policy).
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