CNet Technology CNIG904S manual Package Contents

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CNet Technology Inc

Introduction

NAT Firewall Protection

The firewall protection provided by the Broadband Router is an intrinsic side effect of NAT (Network Address Translation). All users on the LAN share a single external IP address. From the external viewpoint, there is no network, only a single device.

For internal users, the Broadband Router acts as a “transparent proxy server”, translating the multiple internal IP addresses into a single external IP address.

For external requests, any attempt to connect to local resources are blocked. The Broadband Router will not “reverse translate” from a global IP address to a local IP address.

This type of “natural” firewall provides an impregnable barrier against malicious attacks.

Package Contents

The following items should be included:

•The Broadband Router Unit

•Power Adapter

•Quick Installation Guide

•CD-ROM containing the on-line manual.

If any of the above items are damaged or missing, please contact your dealer as soon as possi- ble.

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Contents Shared Broadband Internet Access User’s GuideTable of Contents Overview General Problems Internet Access Broadband RouterBroadband Router Features LAN FeaturesIntroduction Security Features Internet Access FeaturesConfiguration & Management Advanced Internet FunctionsPackage Contents Physical Details Top Mounted LEDsRear Panel DIP Switches Restore Default IP Address and Clear PasswordDIP Switch Setting Description Choose an Installation Site InstallationInstallation Procedure RequirementsPower Up Connect Adsl or Cable ModemCheck the LEDs Configuration OverviewTo Do this Refer to Configuration Program Connecting to the Broadband RouterPreparation If you cant connect Navigation & Data InputData LAN Screen LAN ConfigurationLAN Screen IP AddressDhcp Server DNS Domain Name ServerRouting Table Tip WAN ConfigurationWAN Direct Connection Data WAN Direct ConnectionIP Address ButtonsAccount WAN PPPoEData WAN PPPoE OptionsData WAN StatusWAN Status Direct Connection WAN StatusWAN Status PPPoE Status DataConnection Log Connection Log Messages Message DescriptionDevice LAN/Device StatusData LAN/Device Status LAN PortStatus PC Configuration TCP/IP SettingsTo check your PCs TCP/IP Settings Using Dhcp Using Specify an IP AddressDNS Tab Win 95/98 Internet Access Configuration Accessing AOLMacintosh Configuration Chapter Using the Broadband Routers Dhcp ServerUsing another Dhcp Server What Dhcp DoesTo Configure your PCs to use Dhcp Broadband Router Configuration Using this ScreenRouting Gateway Routing Table DataDestination InterfaceLocal Router Router ConfigurationRouting Example Other Routers on the Local LANFor the Broadband Routers Routing Table For Router As Default RouteFor Router Bs Default Route Entry 1 SegmentPassword When prompted for the password, leave the User Name blankDevice Options NAT Network Address Translation Remote ManagementTo connect from a remote PC via the Internet Advanced Internet Advanced Internet ScreenSpecial Applications Screen Using a Special ApplicationSpecial Internet Applications At any time, only one 1 PC can use each Special ApplicationConfiguration Data from Service Provider IP Address seen by Internet Users Virtual ServersRemote PC Types of Virtual ServersType Virtual Server ConfigurationWAN IP Address LAN IP AddressTo Delete a defined Server User Defined Virtual ServersTo Modify Edit a defined Server To List all ServersConnecting to the Virtual Servers DetailsConfiguring the DMZ DMZ ScreenFeature EnableEnable DMZ DataAccess Control To use this featureOperations To Change Access for an Existing GroupSecurity Groups To Define a Security GroupAccess Rights Internet Access for this Group Packet Filter TableTo Delete an Existing PC PCsTo Add a New PC To Change an Existing PCs DetailsFilters Port No TCP PacketsTCP Filters UDP FiltersTroubleshooting General ProblemsInternet Access Specifications Broadband Router