3Com 3CR856-95 manual Alert LED, Http//192.168.1.1

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are happening frequently in which case you may wish to discuss this with your ISP. The Gateway logs such attacks, and this information is available through the configuration screens.
Recovering from Corrupted Software
If the Alert LED remains permanently on following power-up, it is possible that the system software has become corrupted. In this condition, the Gateway will enter a failsafe state; DHCP is disabled, and the LAN IP address is set to 192.168.1.1. Follow the instructions below to upload a new copy of the system software to a Gateway unit in this state.
Ensure that one of your computers has a copy of the new software image file stored on its hard disk or available on CD-ROM.
1 Remove power from the Gateway and disconnect the Cable/DSL modem and all your computers, except for the one computer with the software image.
2 You will need to reconfigure this computer with the following static IP address information:
IP address: 192.168.1.2
Subnet mask: 255.255.255.0
Default Gateway address: 192.168.1.1
3 Restart the computer, and re-apply power to the Gateway.
4 Using the Web browser on the computer, enter the following URL in the location bar:
http://192.168.1.1
This will connect you to the failsafe mode of the Gateway.

6Re-apply power to the Gateway, and when the start-up sequence has completed, browse to:

http://192.168.1.1

and run the configuration wizard. You may need to restart your computer before you attempt this.

7When the configuration wizard has completed, you may reconnect your network as it was before.

Alert LED

The Alert LED will flash when the Gateway unit is first powered up while the system software checks the hardware for proper operation. Once the Gateway has started normal operation, the Alert LED will go out.

If the Alert LED does not go out following start up, but illuminates continuously, this indicates that the software has detected a possible fault with the hardware. If the Alert LED is flashing slowly this indicates a firmware failure. Remove power from the Gateway, wait 10 seconds and then re-apply power. If the Alert LED comes on continuously again, then a fault has been detected. Locate the copy of the Gateway software on the accompanying CD-ROM and upload it to the Gateway to see if this clears the fault (refer to “Recovering from Corrupted Software” below). If this does not fix the problem, contact your supplier for further advice.

During normal operation, you may notice the Alert LED lighting briefly from time to time. This indicates that the Gateway has detected a hacker attack from the Internet and has prevented it from harming your network. You need take no specific action on this, unless you decide that these attacks

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Contents Page United States Government Legend 3Com Corporation Bayfront Plaza Santa Clara, CaliforniaContents Troubleshooting Using DiscoveryIP Addressing End User Software Licence Agreement Safety InformationISP Information Index Regulatory NoticesPage Naming Convention About this GuideConventions Icon DescriptionRelated Documentation Feedback about this User GuideProduct Registration OfficeConnect Cable/DSL Secure Gateway Introducing the Officeconnect CABLE/DSL Secure GatewayCable/DSL Secure Gateway Advantages Example Network Using a Cable/DSL Secure GatewayMinimum System and Component Requirements Package ContentsFront Panel Power LED GreenAlert LED Orange Flashing slowly Two seconds on, two seconds offRear Panel Power Adapter socketCable/DSL Status LED Ethernet Cable/DSL portPage Before you Install your Gateway Installing the GatewayIntroduction Positioning the GatewayStatic PPPoEConnecting the Cable/DSL Secure Gateway Powering Up the GatewayPage Setting UP Your Computers Obtaining an IP Address AutomaticallyWindows 2000, XP Disabling PPPoE and Pptp Client Software Windows 95, 98, MEMacintosh OS 8.5 Internet Properties Disabling Web ProxyPage Accessing the Wizard Running the Setup WizardWelcome Screen Setting the PasswordTo set the Gateway to World Time UTC Setting the Time ZoneInternet Settings Auto-Configuration SettingsDynamic IP Address Mode Static IP ModeConnection, use the following procedure PPPoE ModePptp Screen Pptp ModeActivating Dhcp Choosing your LAN SettingsViewing the Summary Dhcp Server Setup ScreenPage Navigating Through the Gateway Configuration Pages Gateway ConfigurationMain Menu Option TabsWelcome Screen Password ScreenSetup Wizard LAN SettingsLAN IP Settings Changing the LAN SettingsChanging the Dhcp Server Settings Dhcp Clients Screen Dhcp Clients ListStatic IP Address DSL or Cable Internet SettingsConnection to ISP Screen Connection to ISPStatic Address Setup Screen Configuring a Static IP AddressDynamic Address Setup Screen Configuring a Dynamic IP AddressPPPoE Setup Screen Configuring a PPPoE connectionConfiguring a Pptp connection Setting up NATOne-to-Many and One-to-One NAT Setting up One-to-Many NATConfiguring the Firewall Setting up One-to-One NATVirtual Servers Menu Creating a Virtual DMZ Creating a Virtual ServerPC Privileges Virtual Servers Settings ScreenTo assign different access rights for different computers To use access control for all computersSpecial Applications Screen Special ApplicationsCreating Custom Special Applications Adding and Editing Special ApplicationsCustom Special Applications Setup Screen Advanced Advanced Settings ScreenConfiguring VPNs Setting the VPN ModeIPSec Configuration Address Pool for Pptp and L2TP clients field enter L2TP ConfigurationViewing VPN Connections Pptp ConfigurationAdding and Editing VPN Connections IPSec Connections using Gateway to Gateway IPSec Connections using Remote User AccessIPSec Connection Gateway to Gateway Connection Name field enter headsales L2TP over IPSec ConnectionsPptp Connections Editing IPSec RoutesRestart Accessing the System ToolsTime Zone Loading and Saving the Gateway ConfigurationUpgrading the Firmware of your Gateway Upgrade ScreenStatus Screen Viewing Status and LogsObtaining Support and Feedback for your Gateway Log Settings ScreenFeedback Screen Troubleshooting Browsing to the Gateway Configuration ScreensBasic Connection Checks Forgotten Password Connecting to the InternetHttp//192.168.1.1 Alert LEDDoes the Gateway support virtual private networks VPNs? Frequently Asked QuestionsUsing Discovery Windows Installation 95/98/2000/Me/NTRunning the Discovery Application Discovery Finish Screen Internet Protocol Suite IP AddressingIP Addresses and Subnet Masks Type OneDhcp Addressing How does a Device Obtain an IP Address and Subnet Mask?Static Addressing Type TwoAuto-IP Addressing Private IP AddressesPage Standards Technical SpecificationsSystem Requirements Cable SpecificationsEthernet Performance Operating SystemsSafety Information Important Safety InformationWichtige Sicherheitshinweise Consignes importantes de sécurité Page Page 3Com Corporation END User Software Licence AgreementPage Internet Characteristics Popular ISPs Connection Types ISP InformationInformation Regarding Popular ISPs Page Glossary Ethernet DSL modemEthernet Address Fast EthernetIPSec IP AddressL2TP over IPSec MAC AddressNetwork SwitchNetwork Interface Card NIC ProtocolWizard TrafficPage Numbers IndexIeee Ietf NAT Ping VPN Page FCC Statement Regulatory Notices100 Page DUA08569-5AAA02 Published November
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3CR856-95 specifications

The 3Com 3CR856-95 is a versatile networking device designed to meet the demands of small to medium-sized businesses. As a part of the 3Com OfficeConnect series, the 3CR856-95 combines switching, routing, and security features into a compact, integrated solution that enhances network performance and reliability.

One of the main features of the 3CR856-95 is its ability to support multiple network configurations. It operates as a router and switch simultaneously, offering six Ethernet ports for wired connections, while also integrating wireless capabilities. This allows businesses to connect various devices seamlessly, including computers, printers, and smartphones, providing flexibility and convenience in a modern office environment.

The device incorporates advanced technologies such as Quality of Service (QoS) which prioritizes network traffic to ensure that bandwidth-intensive applications like video conferencing and VoIP run smoothly. This feature is essential for maintaining productivity and communication efficiency in busy office settings. Additionally, the 3CR856-95 supports both IPv4 and IPv6 protocols, making it a future-proof solution as businesses transition to the newer Internet Protocol standard.

Security is a critical consideration for any networking equipment, and the 3CR856-95 addresses this with robust measures. It includes a built-in firewall that protects the network from external threats, along with support for Virtual Private Networks (VPN), allowing secure remote access for employees working from off-site locations. Furthermore, the device supports WPA2 encryption for wireless connections, safeguarding sensitive data transmitted over the network.

Another important characteristic of the 3CR856-95 is its user-friendly interface, which simplifies the setup and management of the network. The device features a web-based management console that allows network administrators to easily configure settings, monitor traffic, and troubleshoot issues from any internet-connected device. This accessibility saves time and reduces the complexity often associated with network management.

In summary, the 3Com 3CR856-95 is a robust and feature-rich networking solution tailored for small to medium-sized businesses. With its combination of switching, routing, and security features, it provides a reliable platform for facilitating seamless communication and connectivity. Its support for advanced technologies and user-friendly management interface makes it a smart choice for organizations looking to enhance their network infrastructure.