What configuration must be modified to establish a VPN tunnel to a FortiGate hub?

To establish a VPN tunnel to a FortiGate hub, enabling IKEv2 in the IPsec phase 1 settings is crucial because IKEv2 (Internet Key Exchange version 2) offers several advantages over its predecessor, IKEv1, such as improved security features, better handling of network changes, and reduced setup time for VPN connections.

Using IKEv2 allows for a more secure and efficient negotiation of the IPsec security associations. It also supports mobility and multi-homing, which can be particularly beneficial in environments with dynamic IP addresses or multiple network connections. Therefore, having IKEv2 enabled ensures that the tunnel can be established effectively with the appropriate security mechanisms.

Modifying IPsec phase 1 settings is a fundamental step in configuring IPsec VPNs because it governs the initial negotiation parameters—such as the exchange of keys and the authentication method used for the tunnel.