Linksys BEFSR81 manual Filter IP Address Range, Filter Port Range, Filter MAC Address

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EtherFast Cable/DSL Router with 8-Port Switch

Filter IP Address Range

To set up a filter using IP addresses, enter the range of IP addresses you wish to filter in the Start and End fields. Users who have filtered IP addresses will not be able to access the Internet at all. If you only want to filter one IP address instead of a range of IP addresses, enter the same value into both fields. For instance, if you wish to filter the PC with the IP address of 192.168.1.5, enter 5 into both fields on one line: 192.168.1.5 ~ 192.168.1.5.

Filter Port Range

To filter users by network port number, select the protocol you want to filter, TCP, UDP, or Both, in the Protocol drop-down box. Enter the port numbers you want to filter in the Start and End fields. Users connected to the Router will no longer be able to access any port number listed there.

Filter MAC Address

This feature blocks computers with specific MAC addresses from going out to the Internet. For information on obtaining a MAC address, go to “Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter.” To set the MAC filter, click the Edit MAC Filter Setting button.

•Edit MAC Filter Setting. Click the Edit MAC Filter Setting button to display Figure 7-16. Select the range of MAC address entries in the drop-down box. In each mac field, enter the MAC address you want to filter. Click the Apply button before closing the window. To cancel changes, click the Undo button.

Block WAN Requests

Use these features to enhance your network’s security and filter multicasting.

•Block Anonymous Internet Requests. This keeps your network from being “pinged” or detected and reinforces your network security by hiding your network ports, so it is more difficult for intruders to work their way into your network. Select Enabled to block anonymous Internet requests, or Disabled to allow anonymous Internet requests.

•Filter Multicast. Multicasting allows for multiple transmissions to specific recipients at the same time. If multicasting is permitted, then the Router will allow IP multicast packets to be forwarded to the appropriate computers. Select Enabled to filter multicasting, or Disabled to disable this feature.

When finished making your changes on this tab, click the Save Settings button to save these changes, or click the Cancel Changes button to undo your changes. For further help on this tab, click the Help button.

Chapter 7: Using The Router’s Web-based Utility

Figure 7-15: Filter

Figure 7-16: MAC Filter Setting

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Filter

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Contents Cable/DSL Router How to Use this Guide Copyright and TrademarksWord definition Table of Contents Common Problems and Solutions Frequently Asked Questions Appendix a TroubleshootingAppendix B Upgrading Firmware Ethernet AdapterBack Panel List of FiguresDdns Disabled Welcome IntroductionWhat’s in this Guide? EtherFast Cable/DSL Router with 8-Port Switch Networking Basics An Introduction to LANsUse of IP Addresses Networking Basics Use of IP Addresses Getting to Know the Router Reset Button Reset button can be used in one of two waysFront Panel Overview Connecting the RouterConnect a PC Connection InstructionsConfiguring Windows 98 and Millennium PCs Configuring the PCsConfiguring Windows XP PCs Configuring Windows 2000 PCsInternet Protocol TCP/IP for Windows XP Instructions Configuring the RouterStatic IP Obtain an IP Automatically or DhcpRAS PPPoEPptp Heart Beat SignalSetup Using The Router’s Web-based UtilityNavigating the Utility SecurityAdministration Quick and Easy AdministrationApplications & Gaming StatusInternet Setup Basic SetupPPPoE RAS for SingTelPptp Heart Beat SignalNetwork Setup Optional SettingsRouter IP Ddns Network Address Server Settings DhcpMAC Address Clone DynDNS.orgTZO.com MAC Clone Advanced Routing14 Routing Table FilterFilter Port Range Filter IP Address RangeFilter MAC Address Block WAN RequestsVPN Passthrough Port Range ForwardingPort Range Port Triggering Triggered RangeForwarded Range 20 UPnP Forwarding UPnP ForwardingDMZ QoS QoSApplication-based QoS Local Router Access Router AccessManagement Port-based QoSIdentification Remote Router AccessUPnP Log25 Incoming Log Table Factory DefaultsUpgrade Firmware Firmware UpgradeRouter Information31 Local Network Local NetworkCommon Problems and Solutions Appendix a TroubleshootingFor Windows 98 and Millennium For WindowsFor Windows XP For Windows 98 and Millennium EtherFast Cable/DSL Router with 8-Port Switch Need to set up a server behind my Router Am not able to access the Router’s Web-based Utility SetupTCP Application Start and End Protocol IP Address EnabledCan’t get the Internet game, server, or application to work Need to upgrade the firmware To start over, I need to set the Router to factory defaultFor Microsoft Internet Explorer 5.0 or higher For Netscape 4.7 or higherMy DSL service’s PPPoE is always disconnecting Firmware upgrade failedNeed to use port triggering Where is the Router installed on the network? Frequently Asked QuestionsIs IPSec Passthrough supported by the Router? Does the Router support IPX or AppleTalk?How can I block corrupted FTP downloads? Will the Router function in a Macintosh environment? What is DMZ Hosting?Is the Router cross-platform compatible? How many ports can be simultaneously forwarded?How do I get mIRC to work with the Router? How can I check whether I have static or Dhcp IP addresses?Appendix B Upgrading Firmware Figure B-1 Upgrade FirmwareWindows 2000 or XP Instructions Windows 98 or Me InstructionsFigure C-3 MAC Address/Physical Address For the Router’s Web-based UtilityAppendix D Windows Help Shared ResourcesNetwork Neighborhood/My Network Places Appendix E Glossary EtherFast Cable/DSL Router with 8-Port Switch EtherFast Cable/DSL Router with 8-Port Switch EtherFast Cable/DSL Router with 8-Port Switch EtherFast Cable/DSL Router with 8-Port Switch EtherFast Cable/DSL Router with 8-Port Switch Eight 10/100 RJ-45 Switched Ports Appendix F SpecificationsStandards PortsLimited Warranty Appendix G Warranty InformationFCC Statement Appendix H Regulatory InformationAppendix I Contact Information Need to contact Linksys?Information section in this Guide
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BEFSR81 specifications

The Linksys BEFSR81 is a highly regarded router that stands as a staple in home networking solutions. With its robust set of features, it has catered to both casual users and technology enthusiasts alike. The BEFSR81 is primarily known for its versatile connectivity options, making it a popular choice for users looking to connect multiple devices without compromising speed or reliability.

One of the standout features of the Linksys BEFSR81 is its ability to support up to eight Ethernet ports, allowing for extensive wired connections. This is particularly beneficial for users with multiple devices that require stable internet access, such as gaming consoles, desktop computers, and smart home devices. Additionally, the router supports advanced networking features, including DHCP server capabilities and network address translation (NAT), further optimizing performance and security.

In terms of security, the BEFSR81 offers stateful packet inspection firewalls and support for Wi-Fi Protected Access (WPA) encryption, ensuring that users' data and privacy are well-protected. It also includes features like MAC address filtering, which allows users to create a whitelist of devices permitted to access the network, bolstering security even further.

The Linksys BEFSR81 adopts a user-friendly interface that simplifies the setup process, making it accessible for individuals with varying levels of technical expertise. Users can manage their network settings effortlessly via the web-based management interface, enabling them to configure passwords, adjust settings, and monitor network activity.

Moreover, the BEFSR81 supports Quality of Service (QoS) features that prioritize bandwidth for certain applications, ensuring that streaming services, online gaming, and video conferencing perform optimally without lag. This is particularly advantageous in households with numerous users engaging in data-intensive activities simultaneously.

Overall, the Linksys BEFSR81 remains a reliable choice for those seeking a well-rounded router that combines a feature-rich design with robust performance. Whether for home office use, casual browsing, or intensive gaming, the BEFSR81 meets the demands of modern networking needs, ensuring a seamless and secure internet experience for its users.
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