Belkin F5D5231-4 Router Manual PDF (Setup & Configuration Guide)

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USING THE WEB-BASED ADVANCED USER INTERFACE

3. DHCP Server

The DHCP server function makes setting up a network very easy by assigning IP

addresses to each computer on the network automatically. The default setting is

“On”. The DHCP server can be turned OFF if necessary, however, in order to do so

you must manually set a static IP address for each computer on your network. To

turn off the DHCP server, select “Off” and click “Apply Changes”.

4. IP Pool

The range of IP addresses set aside for dynamic assignment to the computers on

your network. The default is 2–100 (99 computers). If you want to change this

number, you can do so by entering a new starting and ending IP address and

clicking on “Apply Changes”. The DHCP server can assign 100 IP addresses

automatically. This means that you cannot specify an IP address pool larger than

100 computers. For example, starting at 50 means you have to end at 150 or

lower so as not to exceed the 100-client limit. The starting IP address must be

lower in number than the ending IP address.

5. Lease Time

The length of time the DHCP server will reserve the IP address for each computer.

We recommend that you leave the lease time set to “Forever”. The default setting

is “Forever”, meaning that any time a computer is assigned an IP address by the

DHCP server, the IP address will not change for that particular computer. Setting

lease times for shorter intervals such as one day or one hour frees IP addresses

after the specified period of time. This also means that a particular computer’s IP

address may change over time. If you have set any of the other advanced

features of the Router such as DMZ or client IP filters, these are dependent on

the IP address. For this reason, you will not want the IP address to change.

6. Local Domain Name

The default setting is “Belkin”. You can set a local domain name (network name)

for your network. There is no need to change this setting unless you have a

specific advanced need to do so. You can name the network anything you want

such as “MY NETWORK”.

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USING THE WEB-BASED ADVANCED USER INTERFACE

Viewing the DHCP Client List Page

You can view a list of the computers (known as clients), which are connected to

your network. You are able to view the IP address

(1)

of the computer, the host

name

(2)

(if the computer has been assigned one), and the MAC address

(3)

of

the computer’s network interface card (NIC). Pressing the “Refresh”

(4)

button

will update the list. If there have been any changes, the list will be updated.

(1)

(2)

(3)

(4)

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USING THE WEB-BASED ADVANCED USER INTERFACE

Configuring the Firewall

Your Router is equipped with a firewall that will protect your network from a

wide array of common hacker attacks including:

• IP Spoofing

• Land Attack

• Ping of Death (PoD)

• Denial of Service (DoS)

• IP with zero length

• Smurf Attack

• TCP Null Scan

• SYN flood

• UDP flooding

• Tear Drop Attack

• ICMP defect

• RIP defect

• Fragment flooding

The firewall also masks common ports that are frequently used to attack

networks. These ports appear to be “Stealth” meaning that for all intents and

purposes, they do not exist to a would-be hacker. You can turn the firewall

function off if needed, however, it is recommended that you leave the firewall

enabled. Disabling the firewall protection will not leave your network completely

vulnerable to hacker attacks, but it is recommended that you leave the

firewall enabled.

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USING THE WEB-BASED ADVANCED USER INTERFACE

Configuring the Port Forwarding Settings

Application gateways let you select ports to be open for certain applications to

work properly with the Network Address Translation (NAT) feature of the Router.

A list of popular applications has been included to choose from. You can select

an application from the drop-down list and the proper settings will be

programmed into the Router. If the application you want to set up for is not

here, check the “Virtual Servers” page by clicking “Virtual Servers” on the left

side of the screen. If you cannot find your application in either the “Application

Gateways” screen or the “Virtual Servers” screen, you will need to check with the

application vendor to determine which ports need to be configured. You can

manually input this port information into the Router.

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USING THE WEB-BASED ADVANCED USER INTERFACE

Choosing an Application

Select your application from the drop-down list. Click “Add”. The settings will be

transferred to the next available space in the screen. Click “Apply Changes” to

save the setting for that application. To remove an application, select the

number of the row that you want to remove then click “Clear”. To remove an

application, select the number of the row that you want to remove then

click “Clear”.

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