HP OfficeConnect Firewall Series Manuel d'utilisateur télécharger pdf (Page 131)

OfficeConnect Gigabit VPN Firewall User’s Manual Appendix 22. OBTAINING SUPPORT FOR YOUR PRODUCT

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On Windows-based computers, you can execute a ping command from the Start

menu. Click the Start button, and then click Run. In the Open text box, type a

statement such as the following:

ping 192.168.1.1

Click . You can substitute any private IP address on your LAN or a

public IP address for an Internet site, if known.

If the target computer receives the message, a Command Prompt window

displays like that shown in Figure 20.1.

Figure 20.1. Using the ping Utility

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 OfficeConnect

Gigabit VPN Firewall 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.

20.1.2 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 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 . A Command Prompt window displays with a bracket prompt

(>). At the prompt, type the name of the Internet address you are interested in,

such as www.absnews.com.

The window will display the associate IP address, if known, as shown in Figure

20.2.

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HP OfficeConnect Firewall Series Manuel d'utilisateur Page 131