Linksys WRT310N manual Security Firewall, Internet Filter

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Chapter 3

Advanced Configuration

With Shared Key authentication, the sender and recipient 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 setting 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.

N Transmission Rate  The rate of data transmission should be set depending on the speed of your Wireless-N networking. 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 value 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 value 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 value 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 selection, 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.

Wireless-N Gigabit Router

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Contents Wireless-N Gigabit Router Online Resources Icon DescriptionsCopyright and Trademarks Table of Contents Appendix E Software License Agreement Appendix D Regulatory InformationBack Panel Placement PositionsHorizontal Placement Front PanelSuggested Mounting Hardware Wall-Mounting PlacementAdditional Security Tips General Network Security GuidelinesAutomatic Configuration Dhcp How to Access the Web-Based UtilitySetup Basic Setup Internet SetupPPPoE Static IPTelstra Cable Optional SettingsDhcp Reservation Network SetupDhcp Server Setting Router IPDynDNS.org Setup DdnsTime Setting Ddns ServiceAdvanced Routing Setup MAC Address CloneSetup Advanced Routing MAC Address CloneBasic Wireless Settings Wireless Basic Wireless SettingsRouting Table Method #2 Wireless Wireless SecurityWi-Fi Protected Setup Method #1Security Mode Wireless SecurityRadius Wireless Wireless MAC FilterWireless Client List Wireless MAC FilterAdvanced Wireless Access RestrictionFirewall Security FirewallInternet Filter Web Filter Security VPN PassthroughVPN Passthrough Summary Internet Access PolicyApplications and Gaming Port Range Forwarding Applications and Gaming Single Port ForwardingSingle Port Forwarding Port Range Triggering Applications & Gaming Port Range TriggeringApplications and Gaming DMZ Port Range ForwardingApplications and Gaming QoS QoS Quality of ServiceWireless Internet Access PriorityCategory Management Administration ManagementLog Administration LogAdministration Diagnostics Backup and RestoreFactory Defaults Administration Factory DefaultsAdministration Firmware Upgrade DiagnosticsStatus Local Network Status RouterWireless Network Status Wireless NetworkAppendix a Troubleshooting Appendix B Specifications Obtaining Warranty Service Limited WarrantyExclusions and Limitations Technical Support Industry Canada Statement Safety NoticesFCC Statement FCC Radiation Exposure StatementAvis d’Industrie Canada Wireless DisclaimerDansk Danish Miljøinformation for kunder i EU Regulatory Information Norsk Norwegian Miljøinformasjon for kunder i EU Regulatory Information Software Licenses Software in Linksys ProductsSchedule 1 Linksys Software License Agreement Preamble ScheduleSoftware License Agreement Software License Agreement No Warranty GNU Lesser General Public License Software License Agreement Software License Agreement Software License Agreement No Warranty Original SSLeay License OpenSSL License8100210B-ST