Port Forwarding

Wireless Cable Gateway CG3000D-1CXNAS

A firewall has default rules for inbound traffic (WAN to LAN) and for outbound traffic. Port forwarding affects the inbound rules. These rules restrict access from outsiders. By default, the gateway blocks access from outside except responses to requests from the LAN side. You can use port forwarding to add rules to specify exceptions to the default rule.

Because the gateway uses Network Address Translation (NAT), your network presents only one IP address to the Internet, and outside users cannot directly address any of your local computers. However, by defining an inbound rule you can make a local server (for example, a web server or game server) or computer visible and available to the Internet. The rule tells the Gateway to direct inbound traffic for a particular service to one local server or computer based on the destination port number. This is also known as port forwarding.

Some residential broadband ISPs do not allow you to run server processes (such as a Web or ftp server) from your location. Your ISP might check for servers and suspend your account if it finds active services at your location. See your ISP’s Acceptable Use policy.

To configure port forwarding and services for specific inbound traffic:

1.In the main menu, under Advanced, select Port Forwarding.

2.In the Service field, select a service from the drop-down list. (For example, FTP, which uses TCP ports 20 and 21.)

3.To add a custom rule that is not in the list of services, specify these settings in the Add Custom Rules table:

•Name. Enter a name for the service.

•Start Port. Enter the start port for the

service.

•End Port.Enter the end port for the service.

•Protocol. Select the protocol for the ports:

-TCP. Select TCP only.

-UDP. Select UDP only.

-Both. Select both TCP and UDP.

•Local IP Address. Complete the local IP address for the computer that is using the service.

4.Perform one of these actions:

•Click Add. The Active Forwarding Rules table displays the list of forwarded ports.

•To delete a service, select the radio button in the Active Forwarding Rules table for the service that you want to delete, and then click Delete.

•To reset the selection in the Services field and to clear all the fields in the Add Custom Rules table, click Reset.

30 Chapter 4: Advanced Settings

CG3000D-1CXNAS specifications

The Gateway CG3000D-1CXNAS is a versatile modem and router designed to provide high-speed internet connectivity to homes and small businesses. This device stands out due to its combination of advanced features, robust performance, and user-friendly design.

One of the primary features of the CG3000D-1CXNAS is its DOCSIS 3.0 technology. This enables the modem to support high-speed data transfer rates, making it ideal for today’s streaming-heavy lifestyles. With download speeds that can reach up to 1 Gbps, users can enjoy uninterrupted video streaming, online gaming, and fast file downloads.

The CG3000D-1CXNAS also includes a built-in dual-band wireless router, which allows it to operate on both the 2.4 GHz and 5 GHz bands. This dual-band capability ensures that it can accommodate multiple devices, providing a stable connection while optimizing speeds for various activities. The 2.4 GHz band is perfect for longer ranges and devices that require longer battery life, while the 5 GHz band offers faster data rates for activities like HD streaming and online gaming.

Moreover, this model features four Gigabit Ethernet ports, providing options for wired connections to devices such as computers, gaming consoles, and smart TVs. Gigabit Ethernet ensures that users get the fastest wired connection possible, which is especially important for high-bandwidth activities.

Security is another essential aspect of the Gateway CG3000D-1CXNAS. It includes built-in firewall protection, which helps safeguard the network against unauthorized access. Additionally, the router supports WPA/WPA2 encryption protocols to ensure that wireless connections are secure.

The user interface of the CG3000D-1CXNAS is straightforward, allowing users to easily manage their network settings. The device offers the capability to configure various network options such as parental controls, guest networks, and bandwidth prioritization, making it easy to tailor the network to individual needs.

In summary, the Gateway CG3000D-1CXNAS is a high-performance modem and router that combines advanced networking technologies with user-friendly features. Its DOCSIS 3.0 capabilities, dual-band wireless support, multiple Ethernet ports, and robust security measures make it an excellent choice for anyone looking to enhance their internet experience. Whether for work or leisure, this device provides the speed, reliability, and security necessary for today’s connected world.