In the dashboard, the workflow to create functional site-to-site connections is similar to the CLI. IKE policies, IPSec policies, and VPN services must first be created and then applied to the IPSec site connections, which completes the tunnel configuration.
From the IKE Policies tab, click on the Add IKE Policy button in the upper right-hand corner of the screen. A window will appear that allows you to create an IKE policy:
Once the IKE policy is configured, click on the blue Add button to create the policy. The resulting policy will be listed on the main VPN page under IKE Policies, as shown in the following screenshot: