RuggedCom RuggedRouter RX1100 - Manual (Page 100)

12. Configuring PPP And the Embedded Modem
Revision 1.14.3 100 RX1000/RX1100™
12. Configuring PPP And the Embedded Modem
12.1. Introduction
This chapter familiarizes the user with:
• Configuring PPP Client
• Configuring PPP Server
• Configuring Dial in console
• Viewing status
12.1.1. 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.
12.1.1.1. 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.
12.1.1.2. 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.
12.1.1.3. When the Modem Connects
A PPP Client Connection may be configured to connect at boot time.
12.1.1.4. PPP Dial on Demand
The PPP client can be configured to dial only when there is traffic to be transmitted. In order to do
that, the PPP interface must be configured to be the default gateway (on Ruggedrouter, if the PPP