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Chapter 11 - Configuring PPP and Modem
Chapter 11 - Configuring PPP and Modem
Introduction
This chapter familiarizes the user with:
• Configuring PPP Client
• Configuring PPP Server
• Configuring Dial in console
• Viewing status
PPP and Modem Fundamentals
RuggedRouter may be equipped with an internal modem or with a serial card, which
will allow connection to an external modem. A modem allows connections to be made
over standard telephone lines. PPP (the Point-to-Point Protocol) is used to establish a
network connection over a modem link.
PPP Interface
When a PPP connection is established, a network interface is created in the system.
The interface name for both internal and external modem connections is ppp0. Refer
to this interface name when configuring firewall rules.
Authentication, Addresses and DNS Servers
PPP authentication will, automatically, use either of the PAP or CHAP protocols.
In order to create a PPP client connection in Webmin, you will need to obtain a user
ID and password along with a telephone number from the operator of the PPP server
that you will be dialing. The operator might be an Internet Service Provider or a
system administrator within your organization.
The authentication process will provide a local IP address for use on the PPP interface
and optionally the addresses of the DNS servers and a default gateway address to use.
You should generally use these addresses unless you need to provide your own.
The PPP interface's IP address, obtained from the PPP server, can be either a dynamic
or a static IP address. Firewall configuration should be performed as is appropriate.
In the case of a PPP server configuration, you must configure the parameters
described above for incoming PPP client connections.
When the Modem Connects
A PPP Client Connection may be configured to connect at boot time.
LED Designations
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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