Virtual Private Networks (VPNs) 12-1

Chapter 12

Virtual Private Networks (VPNs)

The Netopia 4752 offers IPsec, PPTP, and ATMP tunneling support for Virtual Private Networks (VPN).

The following topics are covered in this chapter:

■Overview on page 12-1

■About PPTP Tunnels on page 12-3

■About IPsec Tunnels on page 12-7

■Encryption Support on page 12-12

■ATMP/PPTP Default Answer Profile on page 12-13

■VPN QuickView on page 12-14

■Dial-Up Networking for VPN on page 12-15

■Installing the VPN Client on page 12-18

■About ATMP Tunnels on page 12-20

■Allowing VPNs through a Firewall on page 12-23

Overview

When you make a long distance telephone call from your home to a relative far away, you are creating a private network. You can hold a conversation, and exchange information about the happenings on opposite sides of the state, or the continent, that you are mutually interested in. When your next door neighbor picks up the phone to call her daughter at college, at the same time you are talking to your relatives, your calls don't overlap, but each is separate and private. Neither house has a direct wire to the places they call. Both share the same lines on the telephone poles (or underground) on the street.

These calls are virtual private networks. Virtual, because they appear to be direct connections between the calling and answering parties, even though they travel over the public wires and switches of the phone company; private, because neither pair of calling and answering parties interacts with the other; and networks, because they exchange information.

Computers can do the same thing; it's called Virtual Private Networks (VPNs). Equipped with a Netopia 4752, a single computer or private network (LAN) can establish a private connection with another computer or private network over the public network (Internet).

The Netopia 4752 can be used in VPNs either to initiate the connection or to answer it. When used in this way, the routers are said to be tunnelling through the public network (Internet). The advantages are that, like your long distance phone call, you don't need a direct line between one computer or LAN and the other, but use the local connections, making it much cheaper; and the information you exchange through your tunnel is private and secure.

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Netopia 4752 manual Chapter Virtual Private Networks VPNs, Overview
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4752 specifications

The Netopia 4752 is a versatile networking device that serves as a digital subscriber line (DSL) modem and router, designed to provide high-speed internet connectivity and advanced networking capabilities for home and small office environments. This device is notable for its reliability and ease of use, making it a popular choice among users looking for seamless internet access.

One of the main features of the Netopia 4752 is its support for various DSL technologies, including ADSL and ADSL2+. This compatibility ensures that users can achieve optimal bandwidth and speed, even on legacy DSL lines. The modem’s capability to handle downstream speeds of up to 24 Mbps allows for smooth streaming, gaming, and browsing experiences.

Equipped with a robust built-in router, the Netopia 4752 offers multiple Ethernet ports for direct wired connections, accommodating multiple devices simultaneously. This feature is especially beneficial in environments where multiple users need to access the internet without latency. Additionally, the device supports wireless connectivity, enabling users to connect their laptops, smartphones, and other Wi-Fi-enabled devices effortlessly.

Security is a crucial aspect of the Netopia 4752’s functionality. The device incorporates a built-in firewall and supports various security protocols, including WPA and WPA2, ensuring that users’ data remains protected from unauthorized access. The user-friendly web-based interface facilitates easy configuration of security settings, making it accessible even for those with limited technical knowledge.

The Netopia 4752 also features advanced Quality of Service (QoS) settings that allow users to prioritize bandwidth for specific applications or devices. This capability is crucial for households or offices that demand high performance for video conferencing, streaming services, or online gaming.

In terms of characteristics, the Netopia 4752 boasts a compact form factor, making it easy to integrate into any workspace without occupying much space. Its durable design ensures longevity, providing reliable service over time.

Overall, the Netopia 4752 stands out as a dependable DSL modem and router solution, with its high-speed internet capabilities, security features, and flexible connectivity options suitable for both home and small office users who require efficient and effective internet access.
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