Actiontec electronic GT701A user manual Electronic Security

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Appendix c Computer Security

Electronic Security

Here are two methods to secure your computer electronically.

Network Address Translation

If a local area network and a PPP connection to the ISP using dynamic IP addresses through a DHCP server are being used, Network Address Translation (NAT) is being used. NAT provides a very basic level of security.

Firewalls

The safest way to prevent attacks on the computer is through a firewall – a hard- ware device or software program that protects the computer from unauthorized access by controlling who can access your computer and by monitoring the trans- missions between the computer and the Internet

Windows XP has a built-in firewall. For more information, select Help and Support Center from the Help menu. Search for Internet Connection Firewall.

If Windows 98 SE, Me, NT 4.0, or 2000 is running on the computer, consider install- ing a firewall. Hardware and software firewall products are changing rapidly as more homes and businesses establish high-speed digital connections between their local area networks and the Internet.

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Contents DSL Modem Table of Contents Troubleshooting Using UtilitiesSetting Up a Network Setting Up Static IP on the ComputerPackage Contents Introduction1Features Minimum System RequirementsIntroduction Power Light Getting to Know the ModemDSL Light USB Light Internet LightEthernet Light Phone PortPower Switch Power PortReset Switch USB PortSetting Up Modem Connecting a Computer to the ModemPage Setting Up the Modem Page Setting Up the Modem Page Setting Up the Modem Page Setting Up the Modem Page Setting Up the Modem Page Setting Up the Modem Page Setting Up the Modem Installing Phone Filters Setting Up the Modem Page Setting Up the Modem Setting Up the DSL Connection Setting Up the Modem Page Setting Up the Modem Page Performing a Basic Setup Basic SetupPage Changing the Admin User Name and Password Click Save and Restart at the bottom of the screen Using Advanced Setup Accessing Advanced SetupTo access the Web Configurator’s Advanced Setup screens WAN IP Address Transparent Bridging PPP Auto Connect PPP Auto Connect onEncapsulation PPPoA only Specify a Static IP Address LAN IP Address Dhcp ServerBeginning IP Address Ending IP AddressDomain Name Services BlockingLease Time DNS Dynamic or StaticWebsite Blocking Remote Management Application Layer Gateway and Port Forwarding DMZ Hosting Firewall HighMedium LowDynamic Routing NAT Network Address Translation Static RoutingUPnP Universal Plug and Play Time ZoneRemote Syslog Capture Viewing Modem’s Status General StatusPage Routing Table ARP TableWAN Status LAN Status Active User ListThis page left intentionally blank Using Utilities Web Activity LogSystem Log DSL Settings Restore Default Settings Upgrade FirmwareSetting Up a Network EthernetPage Setting Up a Network Page Setting Up a Network USB Setting Up a Network Page Setting Up a Network Page Cannot Use the Internet TroubleshootingTroubleshooting Physical ConnectionsWhich protocols does the Modem support? Frequently Asked QuestionsConnection to the Internet Which connection speeds does the Modem support?How do I find out which IP address my computer is using? Is the Modem flash-upgradeable? How do I do it?What is the valid IP range I can use for my home network? Will my Xbox work with the Modem?Yes, if the application is designed to run over a network How many computers can be connected through the Modem? What is the default username for the Modem?What is NAT and how does it protect my network? Does the Modem function as a firewall?This page left intentionally blank Reference Locating Computer InformationLocating Windows Operating System Files Appendix a Reference Click Search Setting Up Static IP On the Computer Windows 98 SEPage 192.168.0.2 Windows Me Enter the following address in the Subnet mask text boxAppendix b Setting Up Static IP on the Computer 192.168.0.2 Windows Page Appendix b Setting Up Static IP on the Computer 192.168.0.2 Windows XP Page Appendix b Setting Up Static IP on the Computer 192.168.0.2 Comparing DSL Service with a Dial-Up Modem Computer SecurityModem Security Computer SecurityInternet Browsers Electronic Security 100 WAN PPP, DHCP, Static IP Specifications dGeneral Full-rate Adsl InterfaceLED Indicators Power, DSL, Internet, Ethernet, USBEnvironmental Access Point Glossary104 Ssid 106 Non-Windowsf System Setup Classic108 Appendix f Non-Windows Setup 110 Regulatory Compliance Notices ModificationsClass B Equipment Miscellaneous Legal Notices All other names are the property of their respective ownersLimited Warranty 113114 Limited Warranty 116