NETGEAR CG3000 User Manual

Troubleshooting
44
NETGEAR Wireless Cable Gateway CG3000
Troubleshoot the ISP Connection
If your gateway cannot access the Internet and your Cable Link LED is on, you might need to
register the cable MAC address and/or device MAC address of you gateway with your cable
service provider. Your PC might not have the gateway configured as its TCP/IP gateway. If
your PC obtains its information from the gateway by DHCP, reboot the PC and verify the
gateway address.
Troubleshoot a TCP/IP Network Using a Ping Utility
Most TCP/IP terminal devices and routers contain a ping utility that sends an echo request
packet to the designated device. The device responds with an echo reply. Troubleshooting a
TCP/IP network is made easier by using the ping utility in your PC or workstation.
Test the LAN Path to Your Gateway
You can use ping to verify that the LAN path to your gateway is set up correctly.
To ping the gateway from a PC running Windows 95 or later:
1. From the Windows toolbar, click on the Start button and select Run.
2. In the field provided, type Ping followed by the IP address of the gateway like this:
ping 192.168.0.1
3. Click OK.
You should see a message like this one:
Pinging <IP address> with 32 bytes of data
If the path is working, you see this message:
Reply from < IP address >: bytes=32 time=NN ms TTL=xxx
If the path is not working, you see this message:
Request timed out
If the path is not working correctly, you could have one of the following problems:
• Wrong physical connections.
- Make sure the LAN port LED is on. If the LED is off, see Using LEDs to
Troubleshoot on page 42.
- Check that the corresponding Link LEDs are on for your network interface card
and for the hub ports (if any) that are connected to your workstation and gateway.
• Wrong network configuration.
- Verify that the Ethernet card driver software and TCP/IP software are both
installed and configured on your PC or workstation.
- Verify that the IP address for your gateway and your workstation are correct and
that the addresses are on the same subnet.

NETGEAR CG3000 Specifications

General

Brand	NETGEAR
Model	CG3000
Category	Gateway
Language	English

Summary

Connect to the Internet

Gateway Front Panel

Describes the LEDs and buttons on the front panel of the gateway for status and connection verification.

Gateway Rear Panel

Details the various connections available on the rear panel of the gateway, including ports and inputs.

Install the Voice Gateway

Outlines the four-step process for installing the voice gateway, referencing subsequent sections.

Check the Installation Requirements

Lists the necessary prerequisites, including computer setup and cabling, before installing the gateway.

Cable the Gateway

Provides step-by-step instructions for physically connecting the gateway to a computer via Ethernet.

Log In to Your Gateway

Guides users on how to access the gateway's configuration interface via a web browser using default credentials.

Connect to the Internet and VoIP

Explains how to establish an internet connection and set up VoIP services, connecting phone lines.

View the Gateway Status

Shows how to view network configuration and status information for the gateway's internet connection.

Wireless Configuration

Set Up Your Wireless Network

Explains how to set up the wireless network, either manually or using WPS, for device connectivity.

Manually Configure The Wireless Settings

Details how to manually configure wireless network settings, including SSID and security options.

WPA or WPA2 Wireless Security

Configures wireless security using WPA or WPA2 protocols, specifying the Network Key (passphrase).

WEP Security

Explains how to configure WEP security, including encryption strength and passphrase or key settings.

Push 'N' Connect (WPS) Wireless Setup

Guides users through setting up wireless connections using the WPS button or PIN method for automatic configuration.

Content Filtering

View or Email Logs

Describes how to view security logs and configure email alerts for events, specifying contact and SMTP server details.

Block Keywords and Domains

Explains how to block specific keywords within URLs or entire domain names from web access for content control.

Services

Allows disabling or enabling gateway features like Firewall, IPSec, PPTP, and various web-oriented services.

Manage Your Network

Gateway Status

Displays hardware, firmware, and basic status information about the gateway, including network configuration details.

MTA Status

Shows the status of voice ports, including provision status, MAC address, IP address, and telephony signaling.

Signal Status

Tracks the gateway's initialization procedure and provides details on downstream and upstream cable channel status.

Change Password

Guides users on how to change the default gateway login password for enhanced security.

Back Up and Restore Your Settings

Explains how to save and restore gateway configuration settings using a backup file for data preservation.

Event Log

Logs security-related events such as denied incoming service requests and hacker probes.

Diagnostic Ping Utility

Provides a tool to test network connectivity by sending ping requests to specified targets.

Advanced Settings

Wireless Settings

Configures advanced wireless radio settings, SSID broadcast, fragmentation threshold, and access control.

Access Control by MAC Address

Specifies which wireless devices can connect based on their MAC addresses, using allow or deny lists.

Firewall Rules: Port Blocking

Configures outbound traffic rules to block access on specific network ports for enhanced security.

Firewall Rules: Port Forwarding

Sets up inbound rules to make local servers visible to the Internet by directing traffic to specific ports.

WAN Setup

Configures WAN settings, including DMZ address and MTU size for optimal Internet connectivity.

Dynamic DNS

Enables dynamic DNS service for accessing the gateway using a domain name instead of a changing IP address.

LAN IP Setup

Configures LAN IP address, subnet mask, and DHCP server settings for the local network.

Reserving an IP Address for DHCP Use

Assigns a permanent IP address to a computer via DHCP reservation for consistent network access.

Remote Management

Allows remote configuration and status checking of the gateway via the Internet using a secure username and password.

Universal Plug and Play (UPnP)

Enables devices to automatically discover and access network resources and services, including port forwarding.

Troubleshooting

Basic Functions

Provides initial checks and common functions to perform after powering on the gateway.

Using LEDs to Troubleshoot

Explains how to interpret gateway LED behaviors for troubleshooting connection and status issues.

Access the Gateway Configuration

Provides steps to troubleshoot issues preventing access to the gateway's configuration interface via browser.

Troubleshoot the ISP Connection

Guides on resolving issues where the gateway cannot access the Internet, possibly related to MAC registration.

Test the LAN Path to Your Gateway

Verifies the network path from a PC to the gateway using the ping utility, checking for connectivity.

Test the Path from Your PC to a Remote Device

Tests network connectivity from a PC to an external device or server, such as an ISP's DNS server.

Wireless Performance and Gateway Location

Offers guidelines for optimal wireless signal range and performance based on gateway placement and interference.

Technical Specifications

Factory Default Settings

Details the default configuration settings for the gateway, including login, network parameters, and firewall rules.

Notification of Compliance