Chapter 6

Network Address Translation (NAT)

This chapter discusses how to configure NAT on the BIPAC-5100S.

6.1 NAT Overview

NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP address of a host in a packet, for example, the source address of an outgoing packet, used within one network to a different IP address known within another network.

6.1.1 NAT Definitions

Inside/outside denotes where a host is located relative to the BIPAC-5100S, for example, the computers of your subscribers are the inside hosts, while the web servers on the Internet are the outside hosts.

Global/local denotes the IP address of a host in a packet as the packet traverses a router, for example, the local address refers to the IP address of a host when the packet is in the local network, while the global address refers to the IP address of the host when the same packet is traveling in the WAN side.

Note that inside/outside refers to the location of a host, while global/local refers to the IP address of a host used in a packet. Thus, an inside local address (ILA) is the IP address of an inside host in a packet when the packet is still in the local network, while an inside global address (IGA) is the IP address of the same inside host when the packet is on the WAN side. The following table summarizes this information.

ITEM

DESCRIPTION

 

 

Inside

This refers to the host on the LAN.

 

 

Outside

This refers to the host on the WAN.

 

 

Local

This refers to the packet address (source or destination) as the packet travels on the

 

LAN.

 

 

Global

This refers to the packet address (source or destination) as the packet travels on the

 

WAN.

 

 

6.1.2 What NAT Does

In the simplest form, NAT changes the source IP address in a packet received from a subscriber (the inside local address) to another (the inside global address) before forwarding the packet to the WAN side. When the response comes back, NAT translates the destination

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Billion Electric Company BIPAC-5100S Network Address Translation NAT, NAT Overview, NAT Definitions, What NAT Does
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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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