Billion Electric Company BIPAC-5100S user manual How NAT Works, NAT Application

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address (the inside global address) back to the inside local address before forwarding it to the original inside host. Note that the IP address (either local or global) of an outside host is never changed.

The global IP addresses for the inside hosts can be either static or dynamically assigned by the ISP. In addition, you can designate servers, for example, a web server and a telnet server, on your local network and make them accessible to the outside world. With no servers defined, your BIPAC-5100S filters out all incoming inquiries, thus preventing intruders from probing your network. For more information on IP address translation, refer to RFC 1631, The IP Network Address Translator (NAT).

6.1.3 How NAT Works

Each packet has two addresses – a source address and a destination address. For outgoing packets, the ILA (Inside Local Address) is the source address on the LAN, and the IGA (Inside Global Address) is the source address on the WAN. For incoming packets, the ILA is the destination address on the LAN, and the IGA is the destination address on the WAN. NAT maps private (local) IP addresses to globally unique ones required for communication with hosts on other networks. It replaces the original IP source address (and TCP or UDP source port numbers for Many-to-One and Many-to-Many Overload NAT mapping) in each packet and then forwards it to the Internet. The BIPAC-5100S keeps track of the original addresses and port numbers so incoming reply packets can have their original values restored. The following figure illustrates this.

6.1.4 NAT Application

The following figure illustrates a possible NAT application, where three inside LANs (logical LANs using IP Alias) behind the BIPAC-5100S can communicate with three distinct WAN networks. More examples follow at the end of this chapter.

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Contents BIPAC-5100S Table of Contents LAN TCP/IP Appendix Features of the BIPAC-5100S Getting to Know the BIPAC-5100SIntroducing the BIPAC-5100S Multiple PVC Permanent Virtual Circuits Support Multiplexing Applications for the BIPAC-5100S Introducing the Web Configurator Web Configurator OverviewAccessing the BIPAC-5100S Web Configurator Navigating the BIPAC-5100S Web Configurator Configuring Password Resetting the BIPAC-5100SUsing The Reset Button Wizard Setup Wizard Setup IntroductionEncapsulation PPP over EthernetWizard Setup Configuration First Screen 4 RFCMultiplexing VC-based MultiplexingIP Address and Subnet Mask Or PPPoEIP Address Assignment IP Assignment with PPPoA or PPPoE EncapsulationIP Assignment with RFC 1483 Encapsulation IP Assignment with Enet Encap EncapsulationWizard Setup Configuration Second Screen Private IP AddressesNailed-Up Connection PPP NATPPPoE 10.2 RFC Enet Encap Exactly as given Dhcp Setup IP Pool SetupWizard Setup Configuration Third Screen Dhcp Wizard Setup Configuration Connection Tests Test Your Internet ConnectionLAN Setup LAN OverviewLANs, WANs and the BIPAC-5100S DNS Server AddressFactory LAN Defaults DNS Server Address AssignmentRIP Setup MulticastConfiguring LAN TCP/IP WAN Setup WAN OverviewPPPoE Encapsulation Pptp EncapsulationConfiguring WAN Setup Traffic ShapingWhen to use Half Bridge mode PPP Half BridgeFollowing table describes the labels in this screen PPPoE Encap in the Encapsulation field Network Address Translation NAT NAT OverviewNAT Definitions What NAT DoesHow NAT Works NAT ApplicationNAT Mapping Types Type IP MappingPort Forwarding Services and Port Numbers SUA Single User Account Versus NATSUA Server Configuring Servers Behind SUA Example Services Port NumberSelecting the NAT Mode Configuring SUA ServerConfiguring Address Mapping Many-to-One and Server mapping types Editing an Address Mapping Rule NAT Address Mapping Rules screen Dynamic DNS Setup Dyndns Wildcard Configuring Dynamic DNSDynamic DNS Following table describes the labels in this screen Time and Date Setup Configuring Time ZonePage Remote Management Configuration System TimeoutRemote Management Overview Remote Management LimitationsConfiguring Remote Management TelnetFTP WebLabel Description How do I know if Im using UPnP? Universal Plug-and-Play UPnPUniversal Plug and Play Overview NAT TraversalConfiguring UPnP Installing UPnP in Windows ExampleInstalling UPnP in Windows Me Installing UPnP in Windows XP Page Using UPnP in Windows XP Example Auto-discover Your UPnP-enabled Network DeviceWeb Configurator Easy Access Page Maintenance Maintenance OverviewSystem Status Screen Following table describes the labels in this screen System Statistics Dhcp Table Screen Diagnostic Screens Diagnostic General ScreenDiagnostic DSL Line Screen Reset Adsl Line Firmware Screen Page Troubleshooting Using LEDs to Diagnose ProblemsPower LED Web Configurator Cannot telnet into the BIPAC-5100SLogin Username and Password LAN InterfaceWAN Interface Internet Access Remote ManagementRemote Node Connection Cannot connect to a remote node or ISP
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BIPAC-5100S specifications

Billion Electric Company, a global leader in broadband and energy management solutions, has developed the BIPAC-5100S, a powerful and versatile router that meets the demands of small to medium enterprises as well as home users. This device combines high-performance networking capabilities with advanced features designed to enhance connectivity and productivity.

One of the standout characteristics of the BIPAC-5100S is its support for a variety of connectivity options, including IPv4 and IPv6 support, which ensures compatibility with current and future networking standards. The router is equipped with a built-in DSL modem, allowing users to connect directly to DSL services while also supporting Ethernet WAN connectivity for flexible Internet service options. This dual capability makes it an ideal choice for users looking for adaptability in their networking solutions.

Performance-wise, the BIPAC-5100S is powered by a high-speed processor and features multiple Ethernet ports to facilitate wired connections for devices like computers, printers, and servers. With support for speeds up to 300 Mbps, this router is designed to deliver seamless streaming, online gaming, and fast downloads. The advanced Quality of Service (QoS) feature allows users to prioritize bandwidth for specific applications, ensuring that critical services receive the necessary resources for uninterrupted operation.

Security is paramount in any networking device, and Billion Electric enhances this aspect in the BIPAC-5100S. The router includes various security protocols such as WPA/WPA2 encryption, firewall protection, and VPN passthrough capabilities. These features protect the network from unwanted intrusions and provide a safe environment for users to conduct their online activities.

Another notable technology integrated into the BIPAC-5100S is its user-friendly web interface, which simplifies setup and configuration. Users can easily manage their network settings, monitor traffic, and troubleshoot issues through a well-organized dashboard. Additionally, the router supports remote management, allowing IT personnel to maintain networks without needing to be physically present.

In summary, the Billion Electric BIPAC-5100S router stands out with its robust performance, advanced security features, and versatile connectivity options. Whether for business or personal use, this router is designed to meet the evolving needs of users, making it a reliable choice in today's increasingly digital world.
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