Introduction to the Pipeline
How the Pipeline establishes connections
Pipeline Start Here Guide
Preliminary January 30, 1998
1-11
what range of numbers is valid in each octet. When setting up a private network,
you can use the example addresses shown below. If you want to choose different
addresses, choose addresses that fit into the numbering scheme of a Class C
network (small networks with 254 hosts or less).
A Class C address uses a number from 192 to 223 in the first octet of the IP
address, and then any number from 0 to 255 in the following three octets. The
“standard private address” starts with 192.168 in the first two octets. For
example, you can use 192.168.100.1 as the private IP address for your Pipeline.
After choosing an IP address for your Pipeline, use the next address for your
computer. For example, if you use 192.168.100.1 for the Pipeline, use
192.168.100.2 for your computer. (The next computer on your network would
use 192.168.100.3, and the next would use 192.168.100.4, and so on.)
You also need a subnet address for your network devices. If one has not been
assigned to you, you can use a subnet address of 255.255.255.0 or /24, if slash
notation is used, both refer to the same value.
Using Network Address Translation (NAT)
If your ISP dynamically assigns IP addresses, you need to enable Network
Address Translation (NAT). To do so in the QuickStart utility, check NAT to
enable it. To turn NAT on in the on-board software, see “Setting up Network
Address Translation (NAT)” on page 5-11.
When NAT is enabled, every time the Pipeline dials out, it uses the Connection
profile defined as the NAT profile, and sends a DHCP client request asking for
configuration settings, which includes requesting an IP address. The DHCP
server loans the Pipeline an address that is unique on the remote network (which,
in the case of an ISP, is the Internet).
When using NAT, the Pipeline intercepts traffic going out to the wide area
network, and transparently substitutes the loaned IP address for the private
network address used on the local network.
