What configuration changes can help bring an IPsec tunnel phase 1 up between two FortiGate devices? (Choose two)

The choice of setting port2 as the interface on the Remote-FortiGate is significant because the interface selected for the IPsec tunnel must match the endpoint configuration. Each FortiGate device needs to have a properly configured interface that will be used for the IPsec tunnel to ensure that the traffic can navigate through the correct paths. If port2 is the designated interface for the tunnel, then configuring it accurately on the remote device is essential for establishing a successful phase 1 connection.

Additionally, adjusting the pre-shared key settings reinforces the security and authentication mechanisms needed for the IKE negotiation process. The pre-shared key must match on both FortiGate devices to establish a trust relationship during the tunnel initiation. If there is a mismatch in pre-shared keys, the tunnel will not come up, as both devices will fail the authentication step of the tunnel negotiation.

While the other options might affect connectivity, they are not foundational to establishing the basic tunnel connection as the selected choices are.