Linksys WRT54G3GV2-ST manual Security Firewall, Internet Filter

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Chapter 3

Advanced Configuration

use a WEP key for authentication. Select Shared Key to only use Shared Key authentication.

Basic Rate  The Basic Rate setting is not actually one rate of transmission but a series of rates at which the Router can transmit. The Router will advertise its Basic Rate to the other wireless devices in your network, so they know which rates will be used. The Router will also advertise that it will automatically select the best rate for transmission. The default is Default, when the Router can transmit at all standard wireless rates (1-2Mbps, 5.5Mbps, 11Mbps, 18Mbps, and 24Mbps). Other options are 1-2Mbps, for use with older wireless technology, and All, when the Router can transmit at all wireless rates. The Basic Rate is not the actual rate of data transmission. If you want to specify the Router’s rate of data transmission, configure the Transmission Rate setting.

Transmission Rate  The rate of data transmission should be set depending on the speed of your wireless network. You can select from a range of transmission speeds, or you can select Auto to have the Router automatically use the fastest possible data rate and enable the Auto-Fallback feature. Auto-Fallback will negotiate the best possible connection speed between the Router and a wireless client. The default is Auto.

CTS Protection Mode  The Router will automatically use CTS (Clear-To-Send) Protection Mode when your Wireless-N and Wireless-G products are experiencing severe problems and are not able to transmit to the Router in an environment with heavy 802.11b traffic. This function boosts the Router’s ability to catch all Wireless- N and Wireless-G transmissions but will severely decrease performance. The default is Auto.

Beacon Interval  Enter a value between 1 and 65,535 milliseconds. The Beacon Interval value indicates the frequency interval of the beacon. A beacon is a packet broadcast by the Router to synchronize the wireless network. The default is 100.

DTIM Interval  This value, between 1 and 255, indicates the interval of the Delivery Traffic Indication Message (DTIM). A DTIM field is a countdown field informing clients of the next window for listening to broadcast and multicast messages. When the Router has buffered broadcast or multicast messages for associated clients, it sends the next DTIM with a DTIM Interval value. Its clients hear the beacons and awaken to receive the broadcast and multicast messages. The default is 1.

Fragmentation Threshold  This value specifies the maximum size for a packet before data is fragmented into multiple packets. If you experience a high packet error rate, you may slightly increase the Fragmentation Threshold. Setting the Fragmentation Threshold too low may result in poor network performance. Only minor reduction of the default value is recommended. In most cases, it should remain at its default of 2346.

RTS Threshold  Should you encounter inconsistent data flow, only minor reduction of the default value, 2347, is recommended. If a network packet is smaller than the preset RTS threshold size, the RTS/CTS mechanism will not be enabled. The Router sends Request to Send (RTS) frames to a particular receiving station and negotiates the sending of a data frame. After receiving an RTS, the wireless station responds with a Clear to Send (CTS) frame to acknowledge the right to begin transmission. The RTS Threshold value should remain at its default value of 2347.

Click Save Settings to apply your changes, or click Cancel Changes to cancel your changes.

Security > Firewall

The Firewall screen is used to configure a firewall that can filter out various types of unwanted traffic on the Router’s local network.

Security > Firewall

Firewall

SPI Firewall Protection  To use firewall protection, keep the default, Enabled. To turn off firewall protection, select Disabled.

Internet Filter

Filter Anonymous Internet Requests  This feature makes it more difficult for outside users to work their way into your network. This feature is selected by default. Deselect the feature 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 this feature to filter multicasting. This feature is not selected by default.

Filter Internet NAT Redirection  This feature uses port forwarding to block access to local servers from local networked computers. Select this feature to filter Internet NAT redirection. It is not selected by default.

Wireless-G Router for Mobile Broadband

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Contents User Guide About This Guide Icon DescriptionsOnline Resources Copyright and TrademarksTable of Contents Appendix D Regulatory Information Appendix E Contact InformationChapter Product Overview Top PanelSide Panel Opposite Side Panel with AntennaPlacement Positions Horizontal PlacementVertical Placement Front PanelWall-Mounting Placement Suggested Mounting HardwareAdditional Security Tips Chapter Wireless Security ChecklistGeneral Network Security Guidelines Chapter Advanced Configuration How to Access the Web-Based UtilitySetup Basic Setup Internet SetupStatic IP PPPoENetwork Setup Optional SettingsDhcp Server Settings Router IPNetwork Address Server Settings Dhcp Time SettingDhcp Reservation Clients Already ReservedSetup Mobile Network Mobile Network Connection ModeMobile Network Status Data Card StatusSetup Ddns Setup MAC Address CloneDdns Service DynDNS.orgSetup Advanced Routing MAC Address CloneAdvanced Routing Dynamic Routing RIPWireless Basic Wireless Settings Wireless Wireless SecurityBasic Wireless Settings Wireless SecurityWPA2 Enterprise WPA2 PersonalWPA Enterprise Wireless Wireless MAC Filter WEPWireless MAC Filter Advanced WirelessAccess Restriction Wireless Client ListInternet Filter Security FirewallFirewall Internet Access Policy Security VPN PassthroughWeb Filter VPN PassthroughApplications and Gaming Single Port Forwarding Port Range Forwarding Applications and Gaming Port Range ForwardingSingle Port Forwarding Applications & Gaming Port Range Triggering Applications and Gaming DMZPort Range Triggering Dhcp Client TableQoS Quality of Service WirelessInternet Access Priority Applications and Gaming QoSAdministration Management Router AccessWeb Access ManagementAdministration Log Remote AccessBackup and Restore LogDiagnostics Administration DiagnosticsAdministration Factory Defaults Administration Firmware Upgrade Factory DefaultsUpgrade Firmware Status Mobile NetworkStatus Router Status Local NetworkStatus Wireless Network Wireless NetworkAppendix a Troubleshooting Your computer cannot connect to the InternetWhat do the indicator LEDs signify on the Router? Appendix B Specifications WRT54G3GV2-STExclusions and Limitations Limited WarrantyObtaining Warranty Service Technical Support Safety Notices FCC StatementFCC Radiation Exposure Statement Industry Canada StatementWireless Disclaimer Avis d’Industrie CanadaDansk Danish Miljøinformation for kunder i EU Regulatory Information Norsk Norwegian Miljøinformasjon for kunder i EU Regulatory Information Schedule 1 Linksys Software License Agreement Software in Linksys ProductsSoftware Licenses Schedule PreambleSoftware License Agreement Software License Agreement No Warranty OpenSSL License Original SSLeay LicenseSoftware License Agreement Appendix E Contact Information Sprint Online Resource Sprint Technical Support