Chapter 3:Accessing Internet
Numbered IP over ATM (IPoA)+NAT Description:
In this deployment environment, we make up a private IP network of 192.168.1.1. NAT function is
enabled (on ADSL Router or use another NAT box connected to hub) to support multiple clients to
access the Router and some public servers (WWW, FTP).
If you apply for multiple IP addresses from your ISP, you can assign these public IP addresses to the
ADSL Router and public server, e.g., Web or FTP server. Typically the first IP is network address,
the second is used as router IP address and the last one is subnet broadcasting. Other remaining IP
addresses can be assigned to PCs on the LAN.
The following example uses the LAN IP address ranging from 10.3.75.49 to 10.3.75.54 and the
subnet mask for LAN is 255.255.255.248. The WAN address is 10.3.70.1, and the subnet mask for
WAN is 255.255.255.252.
Configuration:
1. Start up your browser and type 192.168.1.1 as the address to enter this ADSL web-based
manager.
2. Go to Quick Start -Quick Setup. Uncheck Auto Scan Internet Connection (PVC). Type in
the VCI and VPI value. Then click the Next button.
VPI – 0
VCI – 32
3. On the Configure Internet Connection -Connection Type page, select the IP over ATM
(IPoA) then click the Next button.
4. In the WAN I P Se tt in gs page, select Use the following IP address and type in the IP address,
subnet mask and gateway that you got from ISP. Then, select Use the following DNS Server
Address. Type in the Primary DNS server and Secondary DNS server.
WAN IP Address: 10.3.70.1
WAN Subnet Mask: 255.255.255.252
Primary DNS server: 168.95.1.1
Secondary DNS server: 168.95.192.1
5. Check the Enable NAT box. And click Next.
6. In the Configure LAN side Settings page, type in the IP address and subnet mask for your