Fortinet FortiGate 60B - Manual (Page 37)

Configuring the modem interface Selecting a modem mode
FortiGate-60B FortiOS 3.0 MR6 Install Guide
01-30006-0446-20080910
37
Configuring the modem interface
This chapter describes the modem interface configuration options. The FortiGate
unit supports the modem interface only when running in NAT/Route mode.
You can configure the modem interface for stand alone mode, the direct
connection to the Internet, or for redundant mode, to act as a backup connection
to the Internet, should the primary connection fail.
This chapter includes the following topics:
• Selecting a modem mode
• Configuring modem settings
• Configuring the modem using the CLI
• Adding a Ping Server
• Adding firewall policies for modem connections
• Administrative access through the modem port
• Configuring the PCMCIA modem card
Selecting a modem mode
The modem interface can work in one of two modes: redundant and stand alone
mode.
To select an operational mode for the modem interface
1 Go to System > Network > Modem.
2 Select Enable modem.
3 Select Redundant for the mode.
To select an operational mode using the CLI, type:
config system modem
set status enable
set status mode redundant
end
Redundant mode
The redundant modem interface is a backup to the external interface connected to
the Internet. If the Ethernet connection goes down for whatever reason, the
modem automatically dials the configured dial-up account(s). When the modem
connects to a dial-up account, the FortiGate unit routes IP packets normally
destined for the selected Ethernet interface to the modem interface. During this
time, the FortiGate unit pings the Ethernet connection to check when it is back
online.