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Chapter 5
WAN Setup
This chapter describes how to configure WAN settings.
5.1 WAN Overview
A WAN (Wide Area Network) is an outside connection to another network or the Internet.
See the Wizard Setup chapter for more information on the fields in the WAN screens.
5.2 PPPoE Encapsulation
The BIPAC-5100S supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE is an IETF
Draft standard (RFC 2516) specifying how a personal computer (PC) interacts with a
broadband modem (DSL, cable, wireless, etc.) connection. The PPPoE option is for a dial-up
connection using PPPoE.
For the service provider, PPPoE offers an access and authentication method that works with
existing access control systems (for example Radius). PPPoE provides a login and
authentication method that the existing Microsoft Dial-Up Networking software can activate,
and therefore requires no new learning or procedures for Windows users.
One of the benefits of PPPoE is the ability to let you access one of multiple network services, a
function known as dynamic service selection. This enables the service provider to easily
create and offer new IP services for individuals.
Operationally, PPPoE saves significant effort for both you and the ISP or carrier, as it requires
no specific configuration of the broadband modem at the customer site.
By implementing PPPoE directly on the BIPAC-5100S (rather than individual computers), the
computers on the LAN do not need PPPoE software installed, since the BIPAC-5100S does
that part of the task. Furthermore, with NAT, all of the LANs’ computers will have access.
5.3 PPTP Encapsulation
Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables secure transfer of
data from a remote client to a private server, creating a Virtual Private Network (VPN) using
TCP/IP-based networks.