Cisco Systems BEFSR41 manual Configuring the Router Security Tab Filter

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EtherFast Cable/DSL Router with 4-Port Switch

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 select Disabled to allow multicasting.

Filter Internet NAT Redirection. This feature uses port forwarding to block access to local servers from local networked computers. Select Enabled to filter Internet NAT redirection, or select Disabled to allow Internet NAT redirection.

Filter IDENT (Port 113). This feature keeps port 113 from being scanned by devices outside of your local network. Select Enabled to filter port 113, or select Disabled to allow port 113 to be scanned by devices on the Internet.

When you have finished making changes to this screen, click the Save Settings button to save the changes, or click the Cancel Changes button to undo your changes. Help information is shown on the right-hand side of the screen. For additional help, click More.

Chapter 5: Configuring the Router

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The Security Tab - Filter

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Contents Cable/DSL Router Word definition How to Use this GuideCopyright and Trademarks Table of Contents Common Problems and Solutions Frequently Asked Questions Appendix a TroubleshootingAppendix B Upgrading Firmware Ethernet AdapterBack Panel List of Figures23 Administration Tab Management Welcome IntroductionWhat’s in this Guide? EtherFast Cable/DSL Router with 4-Port Switch Use of IP Addresses Networking BasicsAn Introduction to Local Area Networks Networking Basics Use of IP Addresses Getting to Know the Router Reset Button Reset button can be used in one of two waysFront Panel Using the Setup Wizard Connecting the RouterUsing the Quick Installation or User Guide OverviewExample of a Typical Network Connection InstructionsSecurity Configuring the RouterSetup Administration How to Access the Web-based UtilityApplications & Gaming StatusInternet Setup Setup Tab Basic SetupInternet Connection Type Obtain an IP AutomaticallyPPPoE Static IPRAS Heart Beat Signal Heart Beat SignalPacket a unit of data sent over a network Network SetupOptional Settings Router IP Network Address Server Settings DhcpTZO.com Setup Tab DdnsDynDNS.org MAC Clone Setup Tab MAC Address CloneAdvanced Routing Setup Tab Advanced RoutingDynamic Routing Static Routing14 Routing Table Entry List Filter IP Address Range Security Tab FilterFilter Port Range Filter MAC AddressConfiguring the Router Security Tab Filter VPN Passthrough Security Tab VPNPort Range Applications & Gaming Tab Port Range ForwardingPort Range Forwarding Port Triggering Applications & Gaming Tab Port TriggeringTriggered Range Forwarded RangeUPnP Forwarding Applications & Gaming Tab UPnP ForwardingEtherFast Cable/DSL Router with 4-Port Switch DMZ Applications & Gaming Tab DMZDevice Priority Applications & Gaming Tab QoSEthernet Port Priority Application PriorityEtherFast Cable/DSL Router with 4-Port Switch Router Access Administration Tab ManagementLocal Router Access Remote Router AccessConfiguring the Router Administration Tab Management Log Administration Tab LogFactory Defaults Administration Tab Factory DefaultsUpgrade Firmware Administration Tab Firmware UpgradeInformation Status Tab RouterLocal Network Status Tab Local NetworkCommon Problems and Solutions Appendix a TroubleshootingFor Windows 98 and Millennium Need to set a static IP address on a PCFor Windows XP For WindowsWant to test my Internet connection EtherFast Cable/DSL Router with 4-Port Switch Am not able to access the Router’s Web-based Utility Setup Need to set up a server behind my Router Application Start and End Protocol IP Address EnabledCan’t get the Internet game, server, or application to work For Netscape 4.7 or higher To start over, I need to set the Router to factory defaultFor Microsoft Internet Explorer 5.0 or higher My DSL service’s PPPoE is always disconnecting Need to upgrade the firmwareFirmware upgrade failed Need 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? If all else fails in the installation, what can I do?Does the Router support ICQ send file? Which modems are compatible with the Router? What is DMZ Hosting?Is the Router cross-platform compatible? 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 UtilityNetwork Neighborhood/My Network Places Appendix D Windows HelpShared Resources Appendix E Glossary EtherFast Cable/DSL Router with 4-Port Switch Packet a unit of data sent over a network EtherFast Cable/DSL Router with 4-Port Switch EtherFast Cable/DSL Router with 4-Port Switch Four 10/100 RJ-45 Switched Ports Appendix F SpecificationsModel BEFSR41 ver Standards PortsStorage Humidity Operating HumidityLimited Warranty Appendix G Warranty InformationFCC Statement Appendix H Regulatory InformationInformation section in this Guide Appendix I Contact InformationNeed to contact Linksys?

BEFSR41 specifications

The Cisco Systems BEFSR41 is a versatile and robust broadband router that has gained popularity for its reliability and feature set, catering to both home users and small businesses. This device integrates an 802.3 Ethernet switch with a wide area network (WAN) port, allowing users to connect multiple local area network (LAN) devices to the internet simultaneously.

One of the standout features of the BEFSR41 is its ability to support up to four Ethernet ports, which facilitates easy connection for computers, printers, and other network devices. This multi-port functionality promotes efficient resource sharing within a network, enabling users to share files, printers, and Internet access seamlessly. The router operates using a robust NAT (Network Address Translation) technology, which enhances network security by ensuring that local IP addresses are not exposed directly to the internet.

The BEFSR41 supports DHCP (Dynamic Host Configuration Protocol), allowing for automatic IP address assignment to connected devices, which simplifies the network setup for users. Furthermore, its built-in firewall features help protect against unauthorized access and potential threats from the internet, making it an ideal choice for small office or home office settings. The router also supports port forwarding, allowing users to configure access for specific applications, such as online gaming or video conferencing.

In terms of connectivity, the BEFSR41 is designed for high-speed broadband connections, making it suitable for DSL or cable internet services. The device offers a straightforward setup process, typically involving a web-based interface that simplifies configuration for users of all technical levels. The compact design and ease of installation make it a convenient choice for those looking to enhance their home or office network.

Additionally, the BEFSR41 supports basic Quality of Service (QoS) features, which enable prioritization of traffic for applications that require higher bandwidth or lower latency. Users can configure these settings to ensure that critical applications receive the necessary resources, promoting a smoother experience during activities like streaming or video calls.

Lastly, the Cisco BEFSR41 is known for its durability and longevity, reflecting the high standards associated with Cisco products. Although newer models and technologies have emerged since its launch, the BEFSR41 remains a solid option for users seeking a reliable and efficient router for basic networking needs. Whether for a small business or a home network, this device offers the essential features and functionality to support daily internet activities.
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