Belkin Router F6D4230-4 User Manual
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49Enhanced Wireless Router sectionstable of c ontents12345789106 UsIng THE WEb- bas Ed ad Van CEd Us ER InTER faCE setting M aC address Control The MAC address filter is a powerful security feature that allows you to specify which computers are allowed on the wireless network � note: This list applies only to wireless computers� This list can be configured so any computer attempting to access the wireless 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) to which you want to allow network access� 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 � setting up an a llow access l ist 1� Select the “Allow” radio button (1) to begin setting up a list of computers allowed to connect to the wireless network � 2� Next, in the “MAC Address” field that is blank (3), type in the MAC address of the wireless computer you want to be able to access the wireless network, then click “
50Enhanced Wireless Router sectionstable of c ontents12345789106 UsIng THE WEb- bas Ed ad Van CEd Us ER InTER faCE setting up a d eny access l ist The “Deny Access” list lets you specify computers that you DO NOT want to access the network � Any computer in the list will not be allowed access to the wireless network� All others will� (1)(2) (3) (5) (4) 1� Select the “Deny” radio button (2) to begin setting up a list of computers to be denied access to the wireless network � 2� Next, in the “MAC Address” field that is blank (3), type in the MAC address of the wireless computer you want to deny access to the wireless network, then click “
51Enhanced Wireless Router sectionstable of c ontents12345789106 UsIng THE WEb- bas Ed ad Van CEd Us ER InTER faCE 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 �
52Enhanced Wireless Router sectionstable of c ontents12345789106 UsIng THE WEb- bas Ed ad Van CEd Us ER InTER faCE Configuring Internal f orwarding 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 s ettings into the Virtual s erver 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 �
53Enhanced Wireless Router sectionstable of c ontents12345789106 UsIng THE WEb- bas Ed ad Van CEd Us ER InTER faCE setting Client IP f ilters The Router can be configured to restrict access to the Internet, email, 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 “80” 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” � (3)(2)(1)(4)(7) (5) (8) (6) (9)
54Enhanced Wireless Router sectionstable of c ontents12345789106 UsIng THE WEb- bas Ed ad Van CEd Us ER InTER faCE 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” �
55Enhanced Wireless Router sectionstable of c ontents12345789106 UsIng THE WEb- bas Ed ad Van CEd Us ER InTER faCE Using dynamic dns The Dynamic DNS service allows you to alias a dynamic IP address to a static host name in any of the many domains DynDNS �org offers, allowing your network computers to be more easily accessed from various locations on the Internet � DynDNS�org provides this service, for up to five host names, free to the Internet community � The Dynamic DNSSM service is ideal for a home website, file server, or to make it easy to access your home PC and stored files while you’re at work � Using the service can ensure that your host name always points to your IP address, no matter how often your ISP changes it� When your IP address changes, your friends and associates can always locate you by visiting yourname�dyndns �org instead! To register free for your Dynamic DNS host name, please visit http://www �dyndns� org� setting up the Router’s d ynamic dns Update Client You must register with DynDNS �org’s free update service before using this feature � Once you have your registration, follow the directions below 1� Select DynDNS as the “DDNS Service” (1)� 2� Enter your DynDNS �org user name in the “User Name” field (2)� 3 � Enter your DynDNS �org password in the “Password” field (3)� 4 � Enter the DynDNS �org domain name you set up with DynDNS �org in the “Domain Name” field (4)� 5 � Click “Update Dynamic DNS” (5) to update your IP address � Whenever your IP address assigned by your ISP changes, the Router will automatically update DynDNS �org’s servers with your new IP address � You can also do this manually by clicking the “Update Dynamic DNS” button (5)� (1) (2) (3) (4) (5)
56Enhanced Wireless Router sectionstable of c ontents12345789106 UsIng THE WEb- bas Ed ad Van CEd Us ER InTER faCE 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 your Router’s security level� Utilities The “Utilities” screen lets you manage different parameters of the Router and perform certain administrative functions � 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)
57Enhanced Wireless Router sectionstable of c ontents12345789106 UsIng THE WEb- bas Ed ad Van CEd Us ER InTER faCE Restarting the Router Sometimes it may be necessary to restart or reboot the Router if it begins working improperly � Restarting or rebooting the Router will NOT delete any of your configuration settings � Restarting the Router to Restore normal operation 1� Click the “Restart Router” button � 2� The following message will appear � Click “OK”� 3� The following message will appear � Restarting the Router can take up to 60 seconds� It is important not to turn off the power to the Router during the restart � 4� A 60-second countdown will appear on the screen � When the countdown reaches zero, the Router will be restarted � The Router home page should appear automatically� If not, type in the Router’s address (default = 192�168 �2 �1) into the navigation bar of your browser �
58Enhanced Wireless Router sectionstable of c ontents12345789106 UsIng THE WEb- bas Ed ad Van CEd Us ER InTER faCE Restoring f actory default settings Using this option will restore all of the settings in the Router to the factory (default) settings � It is recommended that you back up your settings before you restore all of the defaults � 4� A 60-second countdown will appear on the screen � When the countdown reaches zero, the Router’s defaults will be restored � The Router home page should appear automatically� If it does not, type in the Router’s address (default = 192�168 �2 �1) into the navigation bar of your browser � 3� The following message will appear � Restoring the defaults includes restarting the Router� It can take up to 60 seconds � It is important not to turn the power to the Router off during the restart � 2� The following message will appear � Click “OK” � 1� Click the “Restore Defaults” button �