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LAN TCP/IP Setup

Specify the following settings:

•

IP Address

. The LAN IP address of the gateway.

•

IP Subnet Mask

. The LAN subnet mask of the gateway. When combined with the IP

address, the IP subnet mask allows a device to know the following:

-

Which other addresses are local to it

-

Which other addresses must be reached through a gateway

DHCP IP Pool

By default, the gateway functions as a DHCP server. This capability allows the gateway to

assign IP, DNS server, and default gateway addresses to all computers connected to the LAN

that is connected to the gateway. The assigned default gateway address is the LAN address

of the gateway. The gateway assigns IP addresses to the attached computers from a pool of

addresses that are specified in this screen. Each pool address is tested before it is assigned

to avoid duplicate addresses on the LAN. For most applications, the default DHCP and

TCP/IP settings of the gateway are satisfactory.

You can specify the pool of IP addresses that can be assigned by setting the starting IP

address and ending IP address. These addresses are part of the same IP address subnet as

the LAN that is connected to the gateway. Using the default addressing scheme, you define a

range between 192.168.0.2 and 192.168.0.254. You can save part of the range for devices

with fixed addresses.

Specify the following settings:

•

Starting IP Address

. Specify the start of the range for the pool of IP addresses in the

same subnet as the gateway.

•

Ending IP Address

. Specify the end of the range for the pool of IP addresses in the

same subnet as the gateway.

The gateway delivers the following parameters to any LAN device that requests DHCP:

•

An IP address from the range that you have defined

•

Subnet mask

•

Gateway IP address (the LAN IP address of the gateway)

•

DNS server address (if you entered a primary DNS address in the Internet Setup screen;

otherwise, the LAN IP address of the gateway)

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Address Reservation

When you specify a reserved IP address for a computer on the LAN, that computer always

receives the same IP address each time it accesses the DHCP server of the gateway. Assign

reserved IP addresses to computers or servers that require permanent IP settings.

1.

Select

ADVANCED > Setup > LAN Setup

.

The following screen displays:

2.

Click the

Add

button.

3.

In the IP Address field, type the IP address to assign to the computer or server. (Choose an

IP address from the LAN subnet of the gateway, such as 192.168.0.x.)

4.

Type the MAC address of the computer or server.

Tip:

If the computer is already on your network, copy its MAC address from

the Attached Devices screen and paste it here.

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5.

Click the

Apply

button.

The reserved address is added to the table.

The reserved address is not assigned until the next time the computer contacts the DHCP

server of the gateway. Reboot the computer or access its IP configuration and force a

DHCP release and renew.



To edit or delete a reserved address entry:

1.

Select the radio button next to a reserved address.

2.

Click the

Edit

or

Delete

button.

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4

4.

Security

Keeping unwanted content out of your network

This chapter explains how to prevent objectionable content from reaching the computers and

other devices that are connected to your network.

This chapter includes the following sections:

•

Keyword Blocking of HTTP Traffic

•

Block Services (Port Filtering)

•

Schedule Blocking

Security

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Keyword Blocking of HTTP Traffic

Use keyword blocking to prevent certain types of HTTP traffic from accessing your network.

1.

Select

ADVANCED >

Security >

Block Sites

.

2.

Select one of the keyword blocking options:

•

Never

. Turn off keyword blocking.

•

Per Schedule

. Turn on keyword blocking according to the Schedule screen settings.

(See

Schedule Blocking

on page

32.)

•

Always

. Turn on keyword blocking.

3.

In the keyword field, enter a keyword or domain and click the

Add URL Keyword

button.

The keyword list supports up to 32 entries. Here are some sample entries:

•

Specify XXX to block http://www.badstuff.com/xxx.html.

•

Specify .com if you want to allow only sites with domain suffixes such as .edu or .gov.

•

Enter a period (

.

) to block all Internet browsing access.

4.

Click the

Apply

button.



To delete a keyword or domain:

1.

Select the keyword that you want to delete from the list.

2.

Click the

Delete URL Keyword

button.

3.

Click the

Apply

button.

4.

Your changes are saved.

You can exempt one trusted computer from blocking and logging. The computer that you

exempt must have a fixed IP address.



To specify a trusted computer:

1.

Select the

Allow trusted IP address to visit blocked sites

check box.