Linksys WRT54G3G-VN manual Security Tab Firewall, Block WAN Requests

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Wireless-G Router for Mobile Broadband

The Security Tab - Firewall

Firewall

Firewall Protection. Enable this feature to employ Stateful Packet Inspection (SPI) for more detailed review of data packets entering your network environment.

Block WAN Requests

Block Anonymous Internet Requests. Use this feature to prevent your network from being “pinged,” or detected, by other Internet users. The Block WAN Request feature also reinforces your network security by hiding your network ports. Both functions of the Block WAN Request feature make it more difficult for outside users to work their way into your network. This feature is enabled by default. Remove the checkmark 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. This feature is enabled by default. Remove the checkmark to disable this feature.

Filter Internet NAT Redirection. This feature uses port forwarding to block access to local servers from local networked computers. Click the checkbox to filter Internet NAT redirection, or remove the checkmark to disable this feature.

Filter IDENT (Port 113). This feature keeps port 113 from being scanned by devices outside of your local network. This feature is enabled by default. Remove the checkmark to disable this feature.

Change these settings as described here, and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes.

Chapter 5: Configuring the Wireless-G Router for Mobile Broadband

Figure 5-30: Security Tab - Firewall

34

The Security Tab - Firewall

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Contents 802 GHz .11g Wireless- G Word definition How to Use This User GuideCopyright and Trademarks Table of Contents Appendix B Wireless Security Appendix a TroubleshootingCommon Problems and Solutions Frequently Asked Questions Appendix C Upgrading Firmware Appendix D Windows HelpRouter’s Ports List of Figures17 Setup Tab Advanced Routing Router 51 Status Tab Wireless Welcome IntroductionWhat’s in this User Guide? Wireless-G Router for Mobile Broadband Ad-Hoc versus Infrastructure Mode Planning Your Wireless NetworkSsid service set identifier your wireless network’s name Network TopologyPlanning Your Wireless Network Network Layout Router’s Ports Getting to Know the Wireless-G Router for Mobile BroadbandRouter’s LEDs are located on the Router’s other side panel Router’s LEDsRouter’s Data Card Slot Overview Connecting the Wireless-G Router for Mobile BroadbandConnect Your Computer Hardware Installation for Connection to Your Broadband Modem Connect the Power Diagram for Connection to Another Router Hardware Installation for Connection to Another RouterConnect Your Computer Stand Option Placement Options11 Measurement between Wall-Mount Slots Wall-Mount OptionPassword Screen Configuring the Wireless-G Router for Mobile BroadbandMobile Network Setup Setup Tab Basic SetupInternet Setup StatusStatic IP Connection Type L2TP Connection Type Optional SettingsRouter IP Network SetupNetwork Address Server Settings Dhcp 11 Time Setting Time SettingMobile Network Connection Mode Setup Tab Mobile NetworkMobile Network Status Data Card StatusTZO.com Setup Tab DdnsDynDNS.org MAC Clone Setup Tab MAC Address CloneAdvanced Routing Setup Tab Advanced RoutingDynamic Routing Static RoutingWireless Network Wireless Tab Basic Wireless SettingsWireless Security Wireless Tab Wireless SecurityAES 25 Wireless Tab Wireless Security Radius Wireless MAC Filter Wireless Tab Wireless MAC FilterAdvanced Wireless Wireless Tab Advanced Wireless SettingsWireless-G Router for Mobile Broadband Block WAN Requests Security Tab FirewallFirewall Internet Access Access Restrictions Tab Internet AccessTo create an Internet Access policy Security Tab VPN Passthrough33 Internet Policy Summary Port Range Forward Applications and Gaming Tab Port Range ForwardPort Triggering Applications & Gaming Tab Port TriggeringTriggered Range Forwarded RangeApplications and Gaming Tab DMZ Wired QoSApplications and Gaming Tab QoS Device PriorityApplication Priority Wireless QoSEthernet Port Priority UPnP Administration Tab ManagementRouter Password Log Administration Tab LogTraceroute Test Administration Tab DiagnosticsPing Test Administration Tab Config Management Administration Tab Factory DefaultsAdministration Tab Firmware Upgrade 48 Status Tab Mobile Network Status Tab Mobile NetworkInternet Status Tab RouterRouter Information Local Network Status Tab Local NetworkWireless Status Tab WirelessNeed to set a static IP address on a PC Appendix a TroubleshootingCommon Problems and Solutions Wireless-G Router for Mobile Broadband Wireless-G Router for Mobile Broadband TCP Application Start and End Protocol IP Address EnabledCan’t get the Internet game, server, or application to work My DSL service’s PPPoE is always disconnecting To start over, I need to set the Router to factory defaultNeed to upgrade the firmware Power LED keeps flashing Where is the Router installed on the network? Frequently Asked QuestionsIs IPSec Pass-Through supported by the Router? Does the Router support IPX or AppleTalk?How can I avoid corrupted FTP downloads? If all else fails in the installation, what can I do?How will I be notified of new Router firmware upgrades? What are the advanced features of the Router? What is DMZ Hosting?Will the Router function in a Macintosh environment? Is the Router cross-platform compatible?What is the Ieee 802.11b standard? What is the Ieee 802.11g standard?What Ieee 802.11g features are supported? What Ieee 802.11b features are supported?What is roaming? What is infrastructure mode?What is ISM band? What is Spread Spectrum?What is WEP? What is DSSS? What is FHSS? And what are their differences?What is a MAC Address? How do I reset the Router?How do I connect to the mobile network? What do the indicator LEDs signify on the Router?Whom should I call if there is a question or problem? How do I know which mobile network I am using?Security Threats Facing Wireless Networks Appendix B Wireless SecuritySecurity Precautions Appendix B Wireless Security Wireless-G Router for Mobile Broadband Appendix C Upgrading Firmware Figure C-1 Upgrade FirmwareNetwork Neighborhood/My Network Places Appendix D Windows HelpShared Resources For the Router’s Web-based Utility Windows 2000 or XP InstructionsFigure E-4 MAC Address Filter List Appendix F Glossary Wireless-G Router for Mobile Broadband Wireless-G Router for Mobile Broadband Wireless-G Router for Mobile Broadband Wireless-G Router for Mobile Broadband Appendix G Specifications FCC, IC-03, CE, Wi-Fi 802.11b, 802.11g, WPA Appendix H Warranty Information Appendix I Regulatory Information Wireless-G Router for Mobile Broadband Wireless-G Router for Mobile Broadband Wireless-G Router for Mobile Broadband Wireless-G Router for Mobile Broadband Wireless-G Router for Mobile Broadband Wireless-G Router for Mobile Broadband