|Before you start|
Route traffic from the Cloudflare dashboard
When you create an Argo Tunnel, Cloudflare generates a subdomain of
cfargotunnel.com with the UUID of the created Tunnel. You can treat that subdomain as if it were an origin target in the Cloudflare dashboard.
Unlike publicly routable IP addresses, the subdomain will only proxy traffic for a DNS record in the same Cloudflare account. If someone discovers your subdomain UUID, they will not be able to create a DNS record in another account or system to proxy traffic to the address.
- Navigate to the Cloudflare DNS tab.
- Create a new CNAME record and input the subdomain of your Tunnel into the Target field.
- Click Save.
The DNS record is distinct from the state of the Tunnel. You can create DNS records that point to a Tunnel that is not currently running. If the Tunnel stops running, the DNS record will not be deleted. If you point the DNS record to a Tunnel not currently running visitors will see a 1016 error message.
Additionally, you can create multiple DNS records that point to the same Tunnel subdomain. If you are routing traffic from multiple hostnames to multiple services, you will need to create a CNAME entry for each hostname. The CNAME entries will share the same target.
Route traffic from the command line
You can create DNS records from
cloudflared, which will provision a CNAME record that points to the subdomain of a specific Tunnel. The result is the same as creation from the dashboard above.
To do so, run the following command.
$ cloudflared tunnel route dns <UUID or NAME> www.app.com
The command will create a CNAME record that points to the Tunnel subdomain, but will not proxy traffic if the Tunnel is not currently running.
Note: this command requires the
Optional: Configure additional Cloudflare settings
The application will default to the Cloudflare settings of the hostname in your account that includes the Argo Tunnel DNS record, including and . You can changes these settings for your hostname in Cloudflare's dashboard.