185
If the target computer cannot be located, you will receive
the message [Request timed out]. Using the ping command,
you can test whether the path to the ADSL Barricade is
working (using the preconfigured default LAN IP address
192.168.1.1) or another address you assigned.
You can also test whether access to the Internet is
working by typing an external address, such as that for
www.yahoo.com (216.115.108.243). If you do not know the
IP address of a particular Internet location, you can use the
nslookup command, as explained in the following section.
From most other IP-enabled operating systems, you can
execute the same command at a [Command Prompt] or
through a system administration utility.
o
Nslookup
You can use the nslookup command to determine the IP
address associated with an internet site name. You specify
the common name, and the nslookup command looks up the
name in on your DNS server (usually located with your ISP).
If that name is not an entry in your ISP's DNS table, the
request is then referred to another higher-level server, and
so on, until the entry is found. The server then returns the
associated IP address.
On Windows-based computers, you can execute the nslookup
command from the Start menu. Click the [Start] button, and
then click [Run]. In the Open text box, type the following:
nslookup.
Click [OK]. A [Command Prompt-nslookup] window displays
with a bracket prompt (>). At the prompt, type the name
of the internet address your are interested in, such as
www.microsoft.com.
