Linksys BEFSR81 manual For the Router’s Web-based Utility, Figure C-3 MAC Address/Physical Address

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EtherFast Cable/DSL Router with 8-Port Switch

3.Write down the Physical Address as shown on your computer screen (Figure C-3); it is the MAC address for your Ethernet adapter. This appears as a series of numbers and letters.

The MAC address/Physical Address is what you will use for MAC address cloning or MAC filtering.

Note: The MAC address is also called the Physical Address.

The example in Figure C-3 shows the Ethernet adapter’s IP address as 192.168.1.100. Your computer may show something different.

For the Router’s Web-based Utility

For MAC filtering, enter the 12-digit MAC address in this format, XXXXXXXXXXXX, WITHOUT the hyphens. See Figure C-4.

For MAC address cloning, enter the 12-digit MAC address in the MAC Address fields provided, two digits per field. See Figure C-5.

Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter

Figure C-3: MAC Address/Physical Address

Figure C-4: MAC Address Filter

Figure C-5: MAC Address Clone

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For the Router’s Web-based Utility

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Contents Cable/DSL Router Copyright and Trademarks How to Use this GuideWord 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 An Introduction to LANs Networking BasicsUse 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 SignalOptional Settings Network SetupRouter IP Ddns Network Address Server Settings DhcpDynDNS.org MAC Address CloneTZO.com MAC Clone Advanced Routing14 Routing Table FilterFilter Port Range Filter IP Address RangeFilter MAC Address Block WAN RequestsPort Range Forwarding VPN PassthroughPort Range Triggered Range Port TriggeringForwarded 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 UtilityShared Resources Appendix D Windows HelpNetwork 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 InformationNeed to contact Linksys? Appendix I Contact InformationInformation 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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