FortiGate Administration Guide - FirewallShop.com

Configuring the modem interface
System Network
Phone Number
User Name
Password
To configure the modem in Redundant mode, see “Redundant mode
configuration” on page 104.
To configure the modem in Standalone mode, see “Standalone mode
configuration” on page 105.
Redundant mode configuration
The phone number required to connect to the dialup account. Do
not add spaces to the phone number. Make sure to include
standard special characters for pauses, country codes, and other
functions as required by your modem to connect to your dialup
account.
The user name (maximum 63 characters) sent to the ISP.
The password sent to the ISP.
The modem interface in redundant mode backs up a selected ethernet interface. If
that ethernet interface disconnects from its network, the modem automatically
dials the configured dialup accounts. When the modem connects to a dialup
account, the FortiGate unit routes IP packets normally destined for the selected
ethernet interface to the modem interface.
The FortiGate unit disconnects the modem interface and switches back to the
ethernet interface when the ethernet interface can again connect to its network.
You can set a holddown timer which delays switching back to the ethernet
interface to ensure it is stable and fully active before switching the traffic.
There is an optional timeout setting, after which the modem will disconnect if there
is no network activity. This is useful in saving money on dialup connection
charges.
For the FortiGate unit to be able to switch from an ethernet interface to the modem
you must select the name of the interface in the modem configuration and
configure a ping server for that interface. You must also configure firewall policies
for connections between the modem interface and other FortiGate interfaces.
Note: Do not add policies for connections between the modem interface and the ethernet
interface that the modem is backing up.
To configure redundant mode
1 Go to System > Network > Modem.
2 Select Redundant mode.
3 Enter the following information:
Mode
Redundant for
Holddown timer
Redial Limit
Dialup Account 1
Dialup Account 2
Dialup Account 3
Redundant
From the list, select the interface to back up.
Enter the number of seconds to continue using the modem after the
interface is restored.
Enter the maximum number of times to retry if the ISP does not
answer.
Enter the ISP phone number, user name and password for up to
three dialup accounts.
4 Select Apply.
FortiGate Version 3.0 MR5 Administration Guide
104 01-30005-0203-20070830