User`s guide

WAN/LAN

HITRON CGN USER’S GUIDE

4.1.2 LAN IP ADDRESSES AND SUBNETS

IP addresses on the LAN are controlled either by the CGN’s built-in DHCP server

(see

DHCP on page 32), or by you (when you manually assign IP addresses to your

computers).

For more information about IP addresses and subnets in general, see IP Addresses

and Subnets on page 29.

4.1.3 DNS AND DOMAIN SUFFIX

A domain is a location on a network, for instance example.com. On the Internet,

domain names are mapped to the IP addresses to which they should refer by the

Domain Name System. This allows you to enter “www.example.com” into your

browser and reach the correct place on the Internet even if the IP address of the

website’s server has changed.

Similarly, the CGN allows you to define a Domain Suffix to the LAN. When you enter

the domain suffix into your browser, you can reach the CGN no matter what IP

address it has on the LAN.

4.1.4 DEBUGGING (PING AND TRACEROUTE)

The CGN provides a couple of tools to allow you to perform network diagnostics on

the LAN:

Ping: this tool allows you to enter an IP address and see if a computer (or other

network device) responds with that address on the network. The name comes

from the pulse that submarine SONAR emits when scanning for underwater

objects, since the process is rather similar. You can use this tool to see if an IP

address is in use, or to discover if a device (whose IP address you know) is

working properly.

Traceroute: this tool allows you to see the route taken by data packets to get

from the CGN to the destination you specify. You can use this tool to solve

routing problems, or identify firewalls that may be blocking your access to a

computer or service.