Linksys AG241 manual Security Tab, Firewall

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ADSL2 Gateway with 4-Port Switch

•Subnet Mask. The Subnet Mask (also known as the Network Mask) determines which portion of an IP address is the network portion, and which portion is the host portion.

•Gateway. This IP address should be the IP address of the gateway device that allows for contact between the Gateway and the remote network or host.

•Hop Count. Hop Count is the number of hops to each node until the destination is reached (16 hops maximum). Enter the Hop Count in the field.

•Show Routing Table. Click the Show Routing Table button to open a screen displaying how data is routed through your LAN. For each route, the Destination IP address, Subnet Mask, Gateway, and Interface are displayed. Click the Refresh button to update the information. Click the Close button to return to the previous screen.

When finished making your changes on this tab, click the Save Settings button to save these changes, or click the Cancel Changes button to undo your changes.

The Security Tab

Firewall

When you click the Security tab, you will see the Firewall screen. This screen contains Filters and the option to Block WAN Requests. Filters block specific Internet data types and block anonymous Internet requests. To add Firewall Protection, click Enable. If you do not want Firewall Protection, click Disable.

Additional Filters

•Filter Proxy. Use of WAN proxy servers may compromise the Gateway's security. Denying Filter Proxy will disable access to any WAN proxy servers. To enable proxy filtering, click Enabled.

•Filter Cookies. A cookie is data stored on your computer and used by Internet sites when you interact with them. To enable cookie filtering, click Enabled.

•Filter Java Applets. Java is a programming language for websites. If you deny Java Applets, you run the risk of not having access to Internet sites created using this programming language. To enable Java Applet filtering, click Enabled.

•Filter ActiveX. ActiveX is a programming language for websites. If you deny ActiveX, you run the risk of not having access to Internet sites created using this programming language. To enable ActiveX filtering, click Enabled.

Chapter 5: Configuring the Gateway

Figure 5-13: Routing Table List

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The Security Tab

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Contents ADSL2 Gateway How to Use this Guide Copyright and TrademarksWord definition Table of Contents 2Computer-to-VPN Gateway Network21 Internet Policy Summary Figure B-11 Filter Acton Tab Welcome IntroductionWhat’s in this Guide? ADSL2 Gateway with 4-Port Switch What’s an IP Address? Planning Your NetworkGateway’s Functions IP AddressesWhat is a VPN? Dhcp Dynamic Host Configuration Protocol ServersDynamic IP Addresses VPN Gateway to VPN Gateway Why do I need a VPN?VPN Gateway-to-VPN Gateway Line Getting to Know the ADSL2 Gateway with 4- Port SwitchDSL Connecting the ADSL2 Gateway with 4-Port Switch OverviewConnection to a Computer Adsl Connection Security Configuring the GatewaySetup Access RestrictionsAdministration Applications & GamingStatus Internet Setup How to Access the Web-based UtilitySetup Tab Basic Setup TabStatic IP RFC 1483 Bridged Dynamic IPRFC 2516 PPPoE IPoARFC 2364 PPPoA Bridged Mode OnlyNetwork Setup Optional Settings Required by some ISPsDdns Tab DynDNS.orgTZO.com Advanced Routing Advanced Routing TabFirewall Security TabVPN 15 VPN Manual Advanced VPN Tunnel Setup19 Advanced VPN Tunnel Setup Internet Access Access Restrictions Tab22 List of PCs Applications and Gaming Tab Single Port ForwardingPort Range Forwarding DMZ Port TriggeringApplication-based QoS Advanced QoSAdministration Tab Gateway AccessManagement Reporting UPnPEmail Alerts Diagnostics Backup&RestorePing Test Factory Defaults Firmware UpgradeUpgrade from LAN 36 Reboot RebootInternet Connections Status TabGateway Gateway Information40 DSL Connection DSL ConnectionAppendix a Troubleshooting Common Problems and SolutionsNeed to set a static IP address on a computer Want to test my Internet connection ADSL2 Gateway with 4-Port Switch ADSL2 Gateway with 4-Port Switch TCP UDP Can’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 Gateway to factory defaultNeed to upgrade the firmware Firmware upgrade failed, and/or the Power LED is flashingPower LED flashes continuously Does the Gateway support IPX or AppleTalk? Frequently Asked QuestionsWhere is the Gateway installed on the network? Is IPSec Passthrough supported by the Gateway?Does the Gateway support ICQ send file? Is the Gateway cross-platform compatible? What is DMZ Hosting?What are the advanced features of the Gateway? Will the Gateway function in a Macintosh environment?Can the Gateway act as my Dhcp server? What is a MAC Address?How do I reset the Gateway? How do I get mIRC to work with the Gateway?WAG54G EnvironmentFilter List 1 win-Router How to Establish a Secure IPSec TunnelCreate an IPSec Policy Build Filter ListsFigure B-4 IP Filter LIst Filter List 2 Router -winFigure B-7 IP Filter List Tunnel 1 win-Router Configure Individual Tunnel RulesFigure B-13 Authentication Methods Tunnel 2 Router-win Figure B-16 Tunnel Setting TabFigure B-19 IP Filter List Tab Figure B-22 Preshared Key Figure B-25 Connection Type Assign New IPSec PolicyFigure B-28 VPN Tab Create a Tunnel Through the Web-Based UtilityWindows 98 or Me Instructions Figure C-1 IP Configuration ScreenFigure C-3 MAC Address/Physical Address Windows 2000 or XP InstructionsAppendix D Upgrading Firmware Figure D-1 Upgrade FirmwareAppendix E Glossary ADSL2 Gateway with 4-Port Switch ADSL2 Gateway with 4-Port Switch ADSL2 Gateway with 4-Port Switch ADSL2 Gateway with 4-Port Switch ADSL2 Gateway with 4-Port Switch Appendix F Specifications ADSL2 Gateway with 4-Port Switch FCC Statement Appendix G Regulatory InformationAppendix H Warranty Information Appendix I Contact Information Europe Mail AddressOutside of Europe Mail Address

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