Netgear UTM9S – ProSECURE Unified Threat Management (UTM) Appliance with DSL and Wireless modules 参照マニュアル

If your UTM can obtain an IP address, but an attached PC is unable to load any web pages 
from the Internet:

Your PC might not recognize any DNS server addresses. 

A DNS server is a host on the Internet that translates Internet names (such as 
www.netgear.com) to numeric IP addresses. Typically your ISP provides the addresses of 
one or two DNS servers for your use. You can configure your PC manually with DNS 
addresses, as explained in your operating system documentation.

Your PC might not have the UTM configured as its TCP/IP gateway.

Troubleshoot a TCP/IP Network Using a Ping Utility

Most TCP/IP terminal devices and firewalls contain a ping utility that sends an echo request 
packet to the designated device. The device then responds with an echo reply. You can easily 
troubleshoot a TCP/IP network by using the ping utility in your PC or workstation.

Test the LAN Path to Your UTM

You can ping the UTM from your PC to verify that the LAN path to the UTM is set up correctly.

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From the Windows toolbar, click Start and select Run.

In the field provided, type ping followed by the IP address of the UTM, for example:

Click OK. A message similar to the following should display:

Pinging <IP address> with 32 bytes of data

If the path is working, you will see this message:

Reply from <IP address>: bytes=32 time=NN ms TTL=xxx

If the path is not working, you will see this message:

Request timed out

If the path is not functioning correctly, you could have one of the following problems:

Wrong physical connections

Make sure that the LAN port LED is on. If the LED is off, follow the instructions in 

Check that the corresponding Link LEDs are on for your network interface card 

and for the hub ports (if any) that are connected to your workstation and UTM.