SMC Networks SMC7401BRA manual NAT Configuration

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WEB-BASED MANAGEMENT

NAT Configuration

NAT (Network Address Translation) and NAPT (Network Address and Port Translation) convert IP addresses on a private network (designated as “internal” or “Local Area Network” (LAN) to global IP addresses that can forward packets to another registered network (designated as “external” or “Wide Area Network” (WAN), with all traffic passing through the firewall.

NAT/NAPT re-writes the IP headers of internal packets going out, making it appear that they all came from the firewall, and enables multiple PCs on the LAN to access the Internet for the cost of one Internet account and one IP address. Reply packets coming back are re-translated and forwarded to the appropriate internal machine/port. Thus, internal machines are allowed to connect to the outside world. However, external machines cannot find the internal machines since they are aware of only one IP address, that of the firewall. By protecting the single network firewall, the entire internal network can be protected.

NAPT is a special case of NAT, where many IP numbers are hidden behind a number of addresses. In contrast to the original NAT, the number of connections is not limited to that number. With NAPT, an almost arbitrary number of connections is multiplexed using TCP port information.

NAT and NAPT can also secure your network from direct attack by hackers and provide more flexible management by allowing you to change

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Contents Port Broadband Router with Built-in Adsl Modem Page Adsl Router User Guide Page Limited Warranty Limited Warranty FCC Part FCC Class BIii Industry Canada Class B CompliancesEC Conformance Declaration Class B Japan Vcci Class BTaiwan Bsmi Class a Australia AS/NZS 3548 1995 Class B Table of Contents Configuring Client TCP/IP ViiiCables TroubleshootingSpecifications GlossaryTable of Contents Chapter Introduction Features and Benefits Features and Benefits Networking Concepts AdslRoute Determination BridgingRouting Accessing a Remote Site Network ApplicationsAccessing the Internet Transparent Bridged NetworkRouted Network Introduction Chapter Installation Package ContentsLED Indicators Hardware DescriptionRear Panel Rear PanelSystem Requirements Installing a Full-rate Connection Phone Line ConfigurationConnect the System Installing a Splitterless Connection Installing the Barricade without a SplitterConnect the Adsl Line Connect the Power AdapterConnect to the Barricade’s Ethernet Port Connect to the Barricade’s USB Port Web-Based Configuration and Monitoring Logging into the SystemNavigating the Web Browser Interface Making Configuration Changes Setup WizardMenu Overview MenuDescriptionMenu Description Configuration Settings Parameter DescriptionConfiguration Settings Parameter Default Description Asynchronous Transfer Mode ATM Protocol EncapsulationWEB-BASED Management Protocol Multiplexing LAN Configuration Settings NAT Configuration NAT Napt NAT Session Name Configuration Virtual Server Bridge Filtering TypeReboot DNSAdmin Privilege WAN StatusPPP Status TCP Status Route Table Learned MAC Addr Adsl Configuration RIP Configuration RIPAdmin Privilege Password Configuration Misc ConfigurationAdmin Privilege DMZ Other Miscellaneous Functions Status Customer Software Interface customization version Version This screen shows the signal status on the Adsl line Head end Corresponds to a 1 is part of the network/subnet Configure TCP/IP Settings Windows 95/98/MeConfiguring Client TCP/IP Windows 95/98/ME Disable Http Proxy Internet ExplorerObtain IP Settings from Your Adsl Router NetscapeWindows Windows TCP/IP Configuration Setting Obtain IP Settings from Your Barricade Windows NT Windows NT TCP/IP Configuration Setting Disable Http Proxy Configuring Your Macintosh Computer Configuring Your Macintosh Computer Disable Http Proxy Uncheck all checkboxes and click OK Obtain IP Settings from Your Barricade Appendix a Troubleshooting Diagnosing LED IndicatorsTroubleshooting Troubleshooting Chart Troubleshooting Wiring Conventions Ethernet CableRJ-45 Port Pin AssignmentsStraight-Through Wiring Crossover WiringFigure B-2. RJ-11 Connector Pin Numbers Adsl CableStandards Conformance Interface SpecificationsService Type Data RateAdvanced Features EthernetPhysical Characteristics ManagementWarranty Asymmetric Digital Subscriber Line Adsl Glossary-1Bandwidth Dynamic Host Configuration Protocol Dhcp Challenge-Handshake Authentication Protocol ChapDSL Access Multiplexer Dslam Glossary-2Glossary-3 Glossary-4 Glossary-5 Glossary-6 Rate Adaptive Adsl Radsl Quality of Service QoSGlossary-7 RFCGlossary-8 Virtual Path Glossary-9Virtual Host Virtual ServerGlossary-10 For Technical SUPPORT, Call

SMC7401BRA specifications

SMC Networks SMC7401BRA is a versatile ADSL router that combines high-speed internet access with advanced networking features. Designed for home and small office environments, this router offers a reliable solution for users seeking seamless connectivity and robust performance.

One of the standout features of the SMC7401BRA is its compatibility with ANSI T1.413 and G.dmt standards, ensuring it can support a variety of ADSL broadband connections. This router can provide speeds of up to 8 Mbps for downloads and up to 1 Mbps for uploads, making it suitable for activities such as streaming, online gaming, and video conferencing. Its capability to handle multiple connections simultaneously ensures that all users in the network enjoy efficient internet access without significant drop in speed.

The SMC7401BRA is equipped with a built-in 4-port Ethernet switch, allowing users to connect multiple devices directly via Ethernet cables. This convenience is further enhanced by the inclusion of a WAN port, which facilitates connection to an external broadband modem. Additionally, the device offers a USB port for connecting peripheral devices, enhancing the utility of the router in various networking scenarios.

Security is a crucial consideration for any networking device, and the SMC7401BRA does not fall short in this aspect. It features a built-in firewall, which provides protection against unauthorized access, while also supporting various protocols such as VPN pass-through and NAT, ensuring secure data transmission. Furthermore, users can take advantage of the router's support for both WEP and WPA encryption protocols to safeguard their wireless communications.

Installation and configuration of the SMC7401BRA is straightforward, aided by its user-friendly web-based interface. This makes it accessible for users with varying levels of technical expertise. The router also includes features such as DHCP server support, which simplifies IP address management within the network.

In terms of design, the SMC7401BRA is compact and features a sleek chassis that can blend seamlessly into home or office environments. Its reliable performance, combined with its array of features, makes the SMC Networks SMC7401BRA an excellent choice for anyone in need of a dependable ADSL router that can meet the demands of modern internet usage. Whether for casual browsing or more intensive applications, it delivers the performance and security that users expect from a quality networking device.
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