LAN IP Filtersets

Security 13-27

The Netopia 4752 offers LAN-side ﬁltering on the Ethernet hub. This permits multiple IP addresses or subnets on the Ethernet LAN to be kept separate from one another and operate as virtual independent networks sharing a single Internet connection. Small- to medium-sized ofﬁces can beneﬁt by using a single router to connect to the Internet, with multiple businesses within the ofﬁce using independent subnets on the network. Schools can beneﬁt by separating the administrative network from the student network.

A LAN-side ﬁlter is the reverse of a WAN-side ﬁlter. When you use a WAN-side ﬁlter you are restricting external access to your internal network. The most common type of WAN-side ﬁlter is the Basic Firewall that is enabled by default in Netopia routers.

When you create a LAN-side ﬁlter you are restricting access from your internal network to the external world, or to other subnets on your internal network.

The main advantage of ﬁltering from the LAN is to limit users (or a set of users on a subnet) from accessing services such as telnet to the router to make conﬁguration changes or accessing the Internet via HTTP.

Companies desiring to limit certain departments from accessing the Internet can use LAN-side ﬁltering, as well as schools desiring to prevent their student network from downloading ﬁles via FTP etc.

The default WAN ﬁltersets Basic Firewall and NetBIOS Filter should never be applied to your internal LAN because they can cut off access from all of your internal computers to the router itself. Instead, you should create separate new ﬁltersets to be applied to the router’s Ethernet hub to restrict user and subnet access to other subnets or to the Internet.

Filtersets are very powerful access-restriction tools, and for this reason, the LAN-side ﬁlterset binding menu is placed in the Advanced Security Options screen.

Before attempting to create and use LAN-side ﬁltersets, you should read and understand fully the information on subnet and ﬁlterset creation presented in the on-line documentation on your Netopia CD.

■For information on creating multiple subnets, see the User’s Reference Guide chapter on “IP Setup”.

■For more information on ﬁlters and ﬁlter sets, see the User’s Reference Guide chapter on “Security.” After you have created an appropriate ﬁlterset, you apply it to the Ethernet hub interface as follows:

To attach a ﬁlter set to the Ethernet hub interface, navigate to the Advanced Security Options screen from the Main Menu.

Main

System

Configuration

Security

Security Options			Advanced
Security Options			Security Options
			Security Options

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.

Netopia 4752 manual LAN IP Filtersets

Models: 4752