Outgoing PPP over a modem
``A simple outgoing PPP configuration''
shows an example relationship between a bundle and a link device
that would be used to configure a simple outgoing PPP connection
over a modem to a remote access server named Annex.
A simple outgoing PPP configuration
The bundle is configured to use the IP network protocol.
The IP protocol settings associated with the bundle
define IP address negotiation, packet filtering and
routing, VJ header compression, and whether any DNS name
servers that the remote access server advertizes should be used.
The single link device is configured
to use the Link Control Protocol (LCP)
which controls asynchronous control character mapping,
magic number negotiation, and link quality determination.
The remote access server may use one or more of the following methods to
authenticate the incoming user before it will set up the PPP link:
-
the incoming user must execute a chat script that specifies a valid
user name and password to log in (some servers may also require that the
user execute a command such as ppp to start PPP)
-
the incoming user's telephone number (their caller ID)
must match that expected by the server
-
the incoming user must use the
Password Authentication Protocol (PAP)
to supply a valid name and password
-
the incoming user must use the
Challenge-Handshake Authentication Protocol (CHAP)
to prove that they know the secret
that the server associates with their name
NOTE:
The name that the remote access server should authenticate
can be specified in the chat script for login authentication, or it can
be specified in the bundle's configuration as the
override name for both received and transmitted
PAP or CHAP packets.
There must be a remote PAP or CHAP secret
defined for the name in the local authentication database.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 22 April 2004