Small helper script to quickly switch the local port used by a Cloudflare Tunnel and start the tunnel with a single command.

The script:

1. Updates the service: http://localhost:<port> line in your Cloudflare config.
2. Prints the effective port and hostname.
3. Kills any running cloudflared processes.
4. Starts the specified tunnel with the updated config.

Create an alias:

1. echo 'alias port-forward="$HOME/.cloudflared/run-tunnel.sh"' >> ~/.bashrc (or your path to the script)
2. source ~/.bashrc

Then use:

• port-forward 3000

• Linux (tested on Ubuntu).
• bash
• cloudflared
• A configured named tunnel (e.g. localhost-tunnel).
• Config file at:

~/.cloudflared/config.yml

With structure similar to:

tunnel: localhost-tunnel
credentials-file: /home/USER/.cloudflared/<uuid>.json

ingress:
  - hostname: localhost.hasso.tech
    service: http://localhost:3000
  - service: http_status:404

Replace hasso.tech / localhost.hasso.tech with your own zone and hostname.

1. In your zone (e.g. hasso.tech) go to: Rules → Cache Rules → Create rule.
2. Rule name: no-cache localhost
3. When incoming requests match:
   • Condition:
     • Field: Hostname
     • Operator: equals
     • Value: localhost.hasso.tech ← your hostname
4. Then… (action):
   • Action: Cache
   • Setting: Bypass cache (or Cache level: Bypass in the old UI)
5. Save and ensure the rule is Enabled.