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

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USING THE WEB-BASED ADVANCED USER INTERFACE

Configuring Internal Forwarding Settings

The Virtual Servers function will allow you to route external (Internet) calls for

services such as a web server (port 80), FTP server (Port 21), or other

applications through your Router to your internal network. Since your internal

computers are protected by a firewall, computers outside your network (over the

Internet) cannot get to them because they cannot be “seen”. A list of common

applications has been provided in case you need to configure the Virtual Server

function for a specific application. If your application is not listed, you will need

to contact the application vendor to find out which port settings you need.

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”.

Manually Entering Settings into the Virtual Server

To manually enter settings, enter the IP address in the space provided for the

internal (server) machine, the port(s) required to pass (use a comma between

multiple ports), select the port type (TCP or UDP), and click “Apply Changes”. You can

only pass one port per internal IP address. Opening ports in your firewall can pose a

security risk. You can enable and disable settings very quickly. It is recommended

that you disable the settings when you are not using a specific application.

Page 42 / 72

USING THE WEB-BASED ADVANCED USER INTERFACE

Setting Client IP Filters

The Router can be configured to restrict access to the Internet, e-mail, or other

network services at specific days and times. Restriction can be set for a single

computer, a range of computers, or multiple computers.

To restrict Internet access to a single computer for example, enter the IP address of

the computer you wish to restrict access to in the IP fields

(1)

. Next, enter “88” in

both the port fields

(2)

. Select “Both”

(3)

. Select “Block”

(4)

. You can also select

“Always” to block access all of the time. Select the day to start on top

(5)

, the

time to start on top

(6)

, the day to end on the bottom

(7)

, and the time to stop

(8)

on the bottom. Select “Enable”

(9)

. Click “Apply Changes”. The computer at the

IP address you specified will now be blocked from Internet access at the times you

specified. Note: Be sure you have selected the correct time zone under “Utilities>

System Settings> Time Zone”.

(1)

(2)

(9)

(3)

(4)

(7)

(8)

(3)

(5)

Page 43 / 72

USING THE WEB-BASED ADVANCED USER INTERFACE

Setting MAC Address Filtering

The MAC address filter is a powerful security feature that allows you to specify

which computers are allowed on the network. Any computer attempting to access

the network that is not specified in the filter list will be denied access. When you

enable this feature, you must enter the MAC address of each client (computer) on

your network to allow network access to each. The “Block” feature lets you turn on

and off access to the network easily for any computer without having to add and

remove the computer’s MAC address from the list.

To enable this feature, select “Enable MAC Address Filtering”

(1)

. Next, enter the

MAC address of each computer on your network by clicking in the space provided

(2)

and entering the MAC address of the computer you want to add to the list. Click

“Add”

(3)

, then “Apply Changes” to save the settings. To delete a MAC address from

the list, simply click “Delete” next to the MAC address you wish to delete. Click

“Apply Changes” to save the settings.

NOTE:

You will not be able to delete the MAC address of the computer you are using

to access the Router's administrative functions (the computer you are using now).

(3)

(1)

(2)

Page 44 / 72

USING THE WEB-BASED ADVANCED USER INTERFACE

Enabling the Demilitarized Zone (DMZ)

The DMZ feature allows you to specify one computer on your network to be placed

outside of the firewall. This may be necessary if the firewall is causing problems with

an application such as a game or video conferencing application. Use this feature on

a temporary basis. The computer in the DMZ is NOT protected from hacker attacks.

To put a computer in the DMZ, enter the last digits of its IP address in the IP field

and select “Enable”. Click “Apply Changes” for the change to take effect. If you are

using multiple static WAN IP addresses, it is possible to select which WAN IP

address the DMZ host will be directed to. Type in the WAN IP address you wish the

DMZ host to direct to, enter the last two digits of the IP address of the DMZ host

computer, select “Enable” and click “Apply Changes”.

Page 45 / 72

USING THE WEB-BASED ADVANCED USER INTERFACE

Blocking an ICMP Ping

Computer hackers use what is known as “pinging” to find potential victims on the

Internet. By pinging a specific IP address and receiving a response from the IP

address, a hacker can determine that something of interest might be there. The

Router can be set up so it will not respond to an ICMP ping from the outside. This

heightens the level of security of your Router.

To turn off the ping response, select “Block ICMP Ping”

(1)

and click “Apply

Changes”. The Router will not respond to an ICMP ping.

(1)

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