Which phase 1 setting can be configured to match users to their respective dial-up VPN tunnels?

The correct answer is the Peer ID setting. In the context of dial-up VPN tunnels using IPsec, the Peer ID is crucial for identifying different user tunnels. The Peer ID acts as a unique identifier for a peer or remote client attempting to establish a connection. When a user connects through a dial-up VPN, the FortiGate device can use the Peer ID to match the user’s credentials and configurations to the respective tunnel they are trying to access.

By configuring the Peer ID to correspond with user accounts or descriptions, the FortiGate firewall can effectively manage and authenticate each tunnel connection, ensuring that users are directed to their correct VPN profiles. This becomes especially important in environments where multiple users might connect concurrently, and differentiating them is necessary to maintain security and connectivity.

While other settings like Authentication Method or Pre-Shared Key are essential for securing the connection and verifying user credentials, they do not specifically tailor the tunnel per user like the Peer ID does. The Local ID serves a complementary role but does not specifically relate to matching users to individual tunnels in the same way as the Peer ID.