IP Setup, SmartIP and Network Address Translation 10-1

Chapter 10

IP Setup, SmartIP and Network Address Translation

The Netopia R2121 uses Internet Protocol (IP) to communicate both locally and with remote networks. This chapter shows you how to configure the Router to route IP traffic. You also learn how to configure the Router to serve IP addresses to hosts on your local network.

Netopia’s SmartIP features IP address serving and Network Address Translation. For a detailed discussion of Network Address Translation, see Appendix D, “Understanding Netopia NAT Behavior.” This chapter describes how to use the Network Address Translation feature of SmartIP.

Note: When you configured your Netopia R2121 using SmartStart, Network Address Translation was enabled by default. You have the option of disabling it, if you wish. This is done through the System Configuration screens using Console-based Management.

This section covers the following topics:

■“Network Address Translation features” on page 10-1

■“Using Network Address Translation” on page 10-3

■“IP setup” on page 10-6

■“IP address serving” on page 10-16

Network Address Translation allows communication between the LAN connected to the Netopia R2121 and the Internet using a single IP address, instead of a routed account with separate IP addresses for each computer on the network.

Network Address Translation also provides increased security by hiding the local IP addresses of the LAN connected to the Netopia R2121 from the outside world.

With SmartIP, the setup is simpler, so Internet service providers typically offer dial-up accounts supporting Network Address Translation at a significant cost savings.

Network Address Translation features

■NAT is selectable on a per connection basis, optionally allowing real addresses to be used for intranet connections and proxied addresses to be used for Internet connections.

■The NAT user can use any combination of proxied and unproxied addresses simultaneously on the available Telco channels. For instance, one unproxied address connection profile can be used to connect to a central office, while another proxied address connection profile can simultaneously connect the user’s Netopia R2121 and LAN to the Internet.

■The single proxy address is acquired at connection time from the answering side. The address can be assigned by the remote router from either a dynamic pool of addresses or a fixed, static address.

■Static NAT (Network Address Translation) Security is made simpler and more reliable by only having to firewall one IP address and by obscuring the internal network structure from the Internet.

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Netopia R2121 manual Chapter IP Setup, SmartIP and Network Address Translation, Network Address Translation features
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R2121 specifications

The Netopia R2121 is a powerful and versatile router designed for both home and office environments, providing seamless connectivity and robust performance for various networking needs. This device offers a range of features and technologies that cater to the demands of modern users seeking reliable internet access, speed, and security.

One of the standout characteristics of the Netopia R2121 is its dual-band technology, which operates on both the 2.4 GHz and 5 GHz frequency bands. This capability allows users to enjoy faster speeds and less interference, as the 5 GHz band is typically less congested than the traditional 2.4 GHz band. With the ability to support multiple devices simultaneously, the R2121 ensures that users can stream videos, play online games, and conduct video conferences without experiencing lag or connectivity issues.

The router is equipped with advanced security features, including WPA3 encryption, which provides enhanced protection against unauthorized access and data breaches. The R2121 also supports a robust firewall system that guards against external threats, ensuring that the user's network remains secure. Additionally, the router includes parental controls, allowing users to manage and restrict internet access for specific devices or set time limits for usage, making it an excellent choice for families.

Another significant advantage of the Netopia R2121 is its extensive coverage area. With high-gain antennas and advanced beamforming technology, the router can deliver strong and stable Wi-Fi signals even in larger homes or office spaces. This technology focuses the Wi-Fi signal directly toward connected devices, minimizing dead zones and improving overall connectivity.

The R2121 also supports both IPv4 and IPv6, ensuring compatibility with current and future internet technologies. This forward-thinking design makes it a future-proof solution for users looking to invest in a reliable router.

In terms of setup and management, the Netopia R2121 features a user-friendly web interface that allows users to easily customize settings, monitor network performance, and manage connected devices. The inclusion of mobile app support further enhances the user experience, enabling remote monitoring and control of the network from anywhere.

Overall, the Netopia R2121 stands out as a robust and reliable router that combines advanced features, enhanced security, and excellent performance, making it an ideal choice for home and business users alike. With its focus on delivering seamless connectivity and comprehensive management options, the R2121 is well-suited for today's connected lifestyles.
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