How do I configure Internet access for my LAN using NAT?
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User’s Guide: Version 1.2
How do I configure Internet access for my LAN using NAT?
Using NAT, or Network Address Translation, the V!CAS can connect
your LAN to the Internet using a single IP address. This IP address can be
a static address or dynamically assigned by your Internet Service Provid-
er (ISP) at connection time. The beauty of using NAT is that you don’t
need an official IP address for every host on the LAN and NAT provides
you a built-in firewall that protects your LAN from intruders.
Before you begin
You’ll need the following information provided by your ISP.
• Your ISP’s ISDN telephone number.
• The PPP ID of the system your V!CAS will dial into.
• The V!CAS’ PPP Password.
• An IP address (not needed if assigned dynamically).
Configure it
Configure ISP interface
Configure a new ISDN interface for your ISP. Here you’ll need to set:
Partner Name
<ISP Name>
Encapsulation
PPP
Identify by Calling Number
<yes or no>
PPP Authentication Protocol
PAP and CHAP
Partner PPP ID
<PPP ID of ISP’s system>
PPP Password
<PPP password assigned by ISP>
Under
set
ISDN Number
<your ISP’s ISDN telephone number>
Direction
outgoing
Under
configure your IP address.
If your address is assigned dynamically all you need to do here is set
IP Transit Network to “dynamic”. Otherwise set the fields as follows:
IP Transit Network
yes
Local ISDN IP Address
<V!CAS’ static IP Address>
Partner ISDN IP Address
<V!CAS’ static IP Address>
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(p. 41)
ADD
WAN P
ARTNER
ISDN N
UMBERS
IP
