Which method allows management access to the FortiGate CLI without network connectivity?

The serial console provides direct, out-of-band management access to the FortiGate Command Line Interface (CLI). This is achieved through a physical connection to the device's console port (typically RJ-45 or DB-9) using a console cable. This method is independent of the device's network configuration, IP addressing, or interface status, making it the fundamental way to access a device for initial setup or for recovery when network access is lost.

A. SSH console requires an active network connection and a configured IP address on a FortiGate interface to establish a session.
B. The CLI console widget is a feature within the FortiGate web-based manager (GUI), which requires network (HTTPS) access to the device.
D. Telnet console, like SSH, is a network protocol that requires an active network connection and a configured IP address to function.

1. Fortinet FortiOS 7.0.0 Administration Guide, Page 100, "Connecting to the FortiGate CLI": "You can access the CLI in two ways: ... A local console connection to the FortiGate console port. This is a direct connection to the FortiGate unit and does not require the network to be running." The guide further details SSH and Telnet as network-based access methods.

2. Fortinet FortiOS 7.0.0 CLI Reference, Page 31, "Accessing the CLI": "You can access the CLI through a direct console connection or through a network connection using SSH or Telnet." This explicitly separates the direct console connection from network-dependent methods.

3. FortiGate-70F Series QuickStart Guide, Page 4, "Basic Connections": The guide instructs the user to "Connect the Console Port to your management computer using the provided console cable" as a primary step for initial configuration, which precedes any network setup.