Gateway CGD24G user manual Configuring Port Blocking, Considerations for Port Forwarding

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Wireless Cable Modem Gateway CGD24G User Manual

•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.

Note: To reset the selection in the Service field and to clear all the fields in the Add Custom Rules table, click Reset.

4.Perform one of the following actions:

•Click Add to save your settings. The Active Forwarding Rules table now displays the list of ports that are currently forwarded.

•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.

Considerations for Port Forwarding

•If the IP address of the local server PC is assigned by DHCP, it may change when the PC is rebooted. To avoid this, you can assign a static IP address to your server outside the range that is assigned by DHCP, but in the same subnet as the rest of your LAN. By default, the IP addresses in the range of 192.168.0.2 through 192.168.0.9 are reserved for this purpose.

•Local PCs must access the local server using the PCs’ local LAN address (192.168.0.XXX, by default). Attempts by local PCs to access the server using the external WAN IP address will fail.

Remember that allowing inbound services opens holes in your firewall. Only enable those ports that are necessary for your network.

Configuring Port Blocking

You can use port blocking to block outbound traffic on specific ports.

Note: Any outbound traffic that is not blocked by rules that you have created is allowed by the default rule.

Content Filtering and Firewall Rules

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v1.1, May 2009

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Contents Wireless Cable Modem Gateway CGD24G Technical Support Regulatory Compliance Information FCC Guidelines for Human Exposure FCC Information to UserFCC Radio Frequency Interference Warnings & Instructions FCC Declaration Of ConformityV1.1, May Contents Chapter Content Filtering and Firewall Rules Appendix B Related Documents Index V1.1, May Conventions, Formats and Scope About This ManualHow to Print this Manual How to Use This ManualPrinting the Full Manual Revision HistoryXiv About This Manual Package Contents Connecting the Gateway to the InternetLED Descriptions Router Front PanelLAN Router Rear PanelHardware Requirements LAN Configuration RequirementsWhat You Need Before You Begin Router Side PanelConnecting the Gateway V1.1, May V1.1, May For more information see Viewing the Gateway Status on Configuring the Basic Settings V1.1, May Planning Your Wireless Network Chapter Wireless ConfigurationWireless Placement and Range Guidelines Wireless Security Options Manually Configuring Your Wireless Settings and SecurityV1.1, May Settings Description Wireless SettingsSecurity on Configuring WEP Wired Equivalent Privacy Wireless SecurityV1.1, May Configuring WPA or WPA2 Wireless Security V1.1, May V1.1, May Using a WPS Button to Add a WPS Client Using a PIN Entry to Add a WPS Client Connecting Additional Wireless Client Devices Wireless Guest Networks Adding Just WPS ClientsAdding Both WPS and Non-WPS Clients How to Configure a Wireless Guest Network V1.1, May V1.1, May Configuring Wi-Fi Multimedia Turning on Access Control to Restrict Access by MAC Address V1.1, May Configuring Logs Chapter Content Filtering and Firewall RulesBlocking Keywords and Domains Blocking Keywords, Sites, and ServicesV1.1, May Services Blocking ServicesFirewall Rules-Port Forwarding and Port Blocking Configuring Port ForwardingV1.1, May Considerations for Port Forwarding Configuring Port BlockingV1.1, May V1.1, May V1.1, May Viewing the Gateway Status Chapter Managing Your NetworkField Description Gateway Status FieldsViewing the Connection Status Changing the Built-In Password Resetting to Factory Default Settings Backing Up and Restoring Your SettingsViewing the Event Log Running Diagnostic Utilities V1.0, November Chapter Customizing Your Network Configuring Dynamic DNSRestricting Access by MAC Address V1.1, May Configuring Port Triggering V1.1, May Setting Up a DMZ Host LAN IP Settings Reserving an IP Address for Dhcp Use Select the Allow Remote Management check box Enabling Remote ManagementReverting to Factory Default Setting Managing the URL to Connect to The Gateway Configuring Universal Plug and Play UPnPV1.1, May Basic Functions Chapter TroubleshootingUsing LEDs to Troubleshoot Using LEDs to TroubleshootConnecting to the Gateway’s Main Menu Troubleshooting the ISP Connection Troubleshooting a TCP/IP Network Using a Ping UtilityTesting the LAN Path to Your Gateway Testing the Path from Your PC to a Remote Device V1.1, May Table A-1. Technical Specifications Technical SpecificationsTable A-2. Default Configuration Settings Factory Default SettingsFeature Default Behavior Internet Connection V1.1, May Document Link Appendix B Related DocumentsV1.1, May Index Index-2 Index-3 Index-4

CGD24G specifications

The Gateway CGD24G is a versatile networking device designed for enhanced connectivity in both home and small office environments. This gateway serves multiple functions, including routing, firewall protection, and wireless networking, making it a popular choice among users looking for an all-in-one solution.

One of the main features of the CGD24G is its dual-band wireless capability. Operating on both the 2.4 GHz and 5 GHz bands, it provides greater flexibility and less interference, ensuring a stable and reliable wireless connection. The 2.4 GHz band is ideal for everyday tasks such as web browsing and email, while the 5 GHz band is optimized for high-bandwidth activities like streaming and online gaming.

The device is equipped with multiple Ethernet ports, allowing for wired connections to various devices, such as PCs, gaming consoles, and smart TVs. This feature is particularly beneficial for users who prioritize speed and stability over wireless connections. Additionally, the Gateway CGD24G supports advanced routing protocols, including IPv4 and IPv6, ensuring compatibility with modern internet technologies.

Security is a top priority for any networking device, and the CGD24G does not disappoint. It includes a built-in firewall that protects the network from unauthorized access and cyber threats. Moreover, it supports WPA2 encryption, ensuring that data transmitted over the wireless network is secure from potential eavesdropping.

The user-friendly web interface makes it easy to set up and manage the gateway. Even those with limited technical knowledge can navigate the settings to customize the network according to their preferences. Parental controls, quality of service (QoS) settings, and guest network capabilities are also included, allowing users to prioritize bandwidth and manage access for visitors.

In terms of performance, the Gateway CGD24G is designed to handle multiple devices simultaneously, making it suitable for households with diverse internet usage needs. With a robust processor and sufficient memory, it can efficiently manage traffic, minimizing latency and providing a seamless online experience.

Overall, the Gateway CGD24G stands out as a reliable and feature-rich option for users seeking a dependable internet connection. Its combination of dual-band capabilities, security features, and user-friendly management tools makes it an excellent choice for enhancing connectivity in any setting.
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