3Com 3CRWE52196 manual Security Screen

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4Select authorized services by clicking in the appropriate check box(es).

In addition to the four authorised services listed, you can choose to allow or block access to other services. You can either:

Allow all other services with exceptions, or

Block all other services with exceptions

See step 4 of the previous section for more details.

5Click Add to save the settings.

Security Select Security to display the Advanced Settings screen (Figure 55).

Figure 55 Security Screen

The Internet connects millions of computer users throughout the world. The vast majority of the computer users on the Internet are friendly and have no intention of breaking into, stealing from, or damaging your network. However, there are hackers who may try to break into your network.

Allow PING from the Internet PING is a utility, which is used to determine whether a device is active at the specified IP address. PING is normally used to test the physical connection between two devices, to ensure that everything is working correctly.

By default the Gateway has PING disabled in order to make the device more difficult to find on the Internet and less prone to attack.

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Contents OfficeConnect 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Running the Setup Wizard Using Discovery Page About this Guide Pddtechpubscomments@3com.com ConventionsConventions About this Guide OfficeConnect WirelessCable/DSL Gateway Example Network Without a Gateway Gateway Advantages Front Panel Minimum System Component RequirementsAlert LED Orange Four LAN Status LEDs Power LED GreenCable/DSL Status LED Wireless LAN Wlan Status LEDWireless Antennae Rear PanelEthernet Cable/DSL port Power Adapter SocketFour 10/100 LAN ports Introducing the Gateway Introduction Safety InformationPositioning the Gateway 25 mm 1 in. clearance Wall MountingPptp User Name Pptp Password Pptp Server Address Powering Up Connecting the Gateway Hardware Installation Obtaining an IP Address Automatically Setting UP Your ComputersRestart your computer Windows 95/98/ME Windows XPPptp Client Disabling PPPoESoftware Wizard AccessingGateway Login Screen Welcome Screen Click Next to display the Time Zone setup screen Figure WAN Settings Internet Settings Screen PPPoE Screen PPPoE ModeHostname Screen Dynamic IP Address ModeStatic IP Mode Screen Static IP ModeEnter your Primary DNS Address and Secondary DNS address Pptp ModeLAN Settings LAN IP Address Screen Wireless Configuration Screen Summary Configuration Summary Screen Gateway ConfigurationNavigating ThroughGetting Help Changing the Administration Password Unit Configuration LAN SettingsLAN Settings Channel Selection Enable Wireless NetworkingDisable Broadcast Ssid Service Area Name/SSIDWireless Encryption Type Encryption Keys Gateway Configuration Connection Control Detail Screen Authorised Wireless PCsDeleting a MAC Address Modifying a MAC AddressClient List Screen Client ListEncryption settings from the Gateway Service Area Name/SSID of the GatewayProfile Name Pptp DSL or Cable Static IP Address DSL or CableDynamic IP Address DSL or Cable PPPoE DSL onlyGateway Configuration Connection Parameters Screen Static IP Static IP AddressConnection Parameters Screen Dynamic IP Dynamic IP AddressPPP over Ethernet PPPoE Setup ScreenPptp Virtual DMZ FirewallVirtual Server Virtual Servers Settings ScreenSpecial Applications Special Applications Screen Click Add to save your settings Click PCs access authorized services only Gateway Configuration Security Screen Enabling Remote Administration Restart System ToolsRestore Configuration Data Backup ConfigurationReset to Factory Default Status and Logs Screen Status and LogsSupport Support Screen Gateway Configuration Basic Connection Browsing to the Gateway Configuration ScreensChecks Factory Defaults Connecting toForgotten Password Reset toWireless Networking Troubleshooting Alert LED Recovering fromHow do I reset the Gateway to Factory Defaults? Frequently Asked QuestionsHow many computers on the LAN does the Gateway support? Does the Gateway support virtual private networks VPNs? Where can I download software upgrades for the Gateway?What other online resources are there? Troubleshooting Application Windows Installation 95/98/2000/Me/NTRunning DiscoveryDiscovered Gateway Screen Managing the Gateway over the Network Protocol SuiteType Two Type OneHow does a Device Obtain an IP Address and Subnet Mask? Appendix B IP Addressing Cable/DSL Gateway Interfaces System Requirements Operating Systems EMCWlan Interface Wireless Cable/DSL Interfaces GatewayFCC Part 15 Class B Maximum cable length of 100m 327.86 ft Appendix C Technical Specifications Important Safety Information Safety InformationWichtige Sicherheitshinweise Consignes importantes de Appendix D Safety Information 3Com Corporation AgreementAppendix E END User Software Licence Agreement Information Regarding Popular ISPs ISP InformationDrizzle, DSL Extreme, Earthlink Glossary Glossary Ethernet Address See MAC address Glossary Glossary Traffic The movement of data packets on a network Area Glossary Index Ping Model Description FCC StatementFCC Declaration ConformityBsmi Statement Vcci Statement CE StatementEurope CSA StatementChannels Regulatory Notices for Wireless CABLE/DSL GatewayModel Description 3CRWE52196 How to Identify and Resolve Radio-TV Interference ProblemsBsmi Statement RF Exposure Compliance Page All specifications are subject to change without notice