FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
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Article Id 194079

Description

If the external modem has difficulty connecting to a remote modem, use the following tips to verify that the modem and connection is working correctly.

 

Note.

The installed modem must be able to understand standard Hayes AT commands.

The issue may be the capability and reliability of the modem to connect to the remote modem. Fortinet has tested KeySpan and Wiretek USB-to-serial converters versions 1.1 and 2.0 USB-to-Modem adapters.

 

If the modem dials but does not connect, there may be a compatibility issue between the modem and the remote modem attempted to connect to.

Disconnect the modem from the FortiGate, and try connecting using the preferred communication software, such as HyperTerminal or ProComm and configure it to manually dial your provider.
 
If a driver is installed for this modem on the computer, the modem may receive an initialization AT string through the driver without the intervention and/or knowledge.

When the modem is connected to the FortiGate, this initialization string is not sent to the modem.

 

If this string is required in order to obtain a successful modem connection, configure the modem so that the AT register values are preset upon power-up.

 

To determine whether the modem is by configured properly to connect to a remote modem.

 

1) Power-cycle the modem, and communicate to it directly using the COM port.
Do not select a modem type within the serial communication software.

 

2) Establish a modem connection manually by typing the ATDTxxx command, where xxx represents the phone number.

 

3) Confirm a successful PAP PPP connection, for example, Windows Dial-Up Networking from the PC.

 

If the connection is successful, the modem is configured properly. Connect the modem to the FortiGate unit, and retest.

 

If there is a problem after completing the steps above contact Fortinet Technical Support for further help.

 

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