1.给设备加电：

FGT 310B

Ver:02060000
SerialNum:FGT-1k310xxxxx
SDRAM Initialization
Scanning PCI Bus...Done.
Total RAM: 256M
Enabling Cache...Done.
Allocating PCI Resources...Done.
Zeroing IRQ Settings...Done.
Checking IRQ Routing Tables...Done.
Enabling Interrupts...Done.
Configuring L2 Cache...Done.
Boot Up, Boot Device Capacity=61MB.
Press any key to display configuration menu...
.
[G]: Get firmware image from TFTP server.
[F]: Format boot device.
[Q]: Quit menu and continue to boot with default firmware.
[H]: Display this list of options.
...

2.在此处注意上面提示：按键，并且会有提示，使用TFTP刷firmware image,接在第10个端口（注：其它型号可能不一样，留意此处）

Enter tftp server address [192.168.1.168]: 172.16.5.99 (输入TFTP服务器的IP地址)
Enter local address [192.168.1.188]: 172.16.5.98 (任意的和TFTP服务器同网段的IP地址)
Enter File Name [image.out]: FGT_310b-build251-FORTINET.out
MAC:00:09:0f:03:01:cb 100Mbps full-duplex
########
Total 8716388 Bytes Data Is Downloaded.
Verifying The CF Image.

Total 32768kB Are Unzipped.
Do You Want To Save The Image ?[Y/n] (这里回答'Y')
Programming The Boot Device Now.
................................
Reading Boot Image 892549 Bytes.
Initializing Firewall ...

(none) login: admin
Password:
Welcome!

比较简单，没什么可说的！重要是下载firmware需要注册的账户才有权限。