Chapter 10 – Configuring PPP and Modem
Chapter 10 – C onfiguri ng PPP and Mode m
Introduc tion
This chapter familiarizes the user with:
•Configu ring PP P Clien t
•Configu ring PP P Server
•Configu ring Di al in co nsole
•Viewin g status

Modem F undamentals

The modem allows connections to be made over standard telephone lines. PPP is
used to run network traffic over a modem link.

PPP Mode Fundamentals

PPP (Point-to-Point Protocol) is a protocol for linking two systems over a serial line.
As your PPP connection is established a PPP interface will be created. The name will
be “ppp0”. Use this interface name in firewall rules.
Authenti cation, Add resses and DNS Servers
PPP authentication utilizes PAP or CHAP. Your ISP will provide you with a user-ID
and password along with a phone number which you will enter in the GUI. The
authentication process will assign a local IP address and addresses of the ISPs DNS
servers to the router. You should use these DNS servers unless you wish to provide
your own.
You will obtain either a dynamic or static IP from your ISP. Firewall configuration
should be performed as is appropriate.
When the Modem Con nects
The modem may be configured to connect at boot time.
LED Des ignations
The RuggedRouter provides a pair of LEDs to indicate information about the modem
PPP connection.
PPP-Link will be green when the modem PPP link is established. It will flash while a
connection is being established, or a console dial in session is active.
PPP-Data will flash green when there is traffic on the PPP link.
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