Unnumbered Ip Over Atm (Ipoa)+Nat - Siemens SL2-141 User Manual

Unnumbered IP over ATM (IPoA)+NAT

Description:
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.
In such circumstance, we enable NAT function but not assign any WAN IP.
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 IP Settings page, select None for WAN IP address settings. Then, select Use the
following DNS Server Address. Type in the Primary DNS server and Secondary DNS server.
Click Next for next page.
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
LAN.
Primary IP Address: 192.168.1.1
Subnet mask: 255.255.255.0
Chapter 3:Accessing Internet
63