Lightning SA MultiCom, User Manual, Page: 60 / 172

Chapter 3 Getting Started
60 MultiCom Firewall User’s Manual
Provider. Additionally you will need to enter the IP Address and Subnet Mask of
your broadband modem. This information is available from your Internet Service
Provider.
The PPTP setting causes the MultiCom Firewall to automatically and regularly
demand its IP configuration from a PPTP server connected through the WAN
interface using a username and password. All needed Internet parameters such as
the MultiCom Firewall’s IP address, IP subnet, default gateway, and external
DNS servers will be automatically requested directly from the ISP using the
PPTP protocol.
It is important to know the existing IP configuration of the modem offering a
PPTP server because the MultiCom Firewall WAN interface mst be on the same
subnetwork as the Ethernet interface of the modem. This creates 2 networks, one
between the MultiCom Firewall and the broadband modem and one between the
MultiCom Firewall and the local network. By default this PPTP Setup Panel
configures your WAN interface’s network to be 10.0.0.1/255.0.0.0, expects to
find the broadband modem at IP address 10.0.0.138, and changes the LAN
interface to 192.168.1.1/255.255.255.0. Although this is a very common
configuration it may not be the way your broadband modem is configured. Be
sure to verify
CAUTION - Saving a PPTP configuration using Easy-Setup will
change the default IP address of the MultiCom Firewall’s LAN
interface. This change requires you to reboot your computer after
using the Easy-Setup wizard
1. Select
PPPoE
in the Connection Type box and click the “Next” button to see
the following Easy Setup configuration option page. This is where you enter
in your username and password, modem IP Address, WAN IP Address and
Subnet Mask.