Verizon GT701C user manual DMZ Hosting, NAT Network Address Translation

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Chapter 5 Configuring Security Settings

DMZ Hosting

Selecting DMZ Hosting in the “Security” screen generates the “DMZ Hosting” screen. To use DMZ hosting, select the computer on the network to be used as a DMZ host in the “DMZ Host PC Name” drop-down menu, then click On.

DMZ hosting is used to support online gaming and Internet conferencing services. These programs usually require multiple open ports, making the network acces- sible from the Internet. DMZ hosting symbolically places the DMZ host computer outside of the Modem’s network. We recommend activating DMZ hosting only as long as necessary.

When finished with this screen, click Apply to save the changes.

MWarning: The DMZ Host computer will be vulnerable to com- puter hackers on the Internet while in DMZ mode.

NAT (Network Address Translation)

Selecting NAT in the “Security” screen generates the “NAT” screen. The Modem’s basic firewall security is based on NAT. Disabling NAT allows the computers con- nected to the Modem to be accessed by outside parties, and can cause the loss of Internet connectivity. Do not turn NAT off unless instructed to do so by Verizon.

When finished with this screen, click Apply to save the changes.

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Contents User’s Manual Table of Contents Configuring Parental Controls Introduction1 Minimum System RequirementsFeatures Getting to Know the Modem Power LightDSL Light USB Light Internet LightEthernet Light DSL PortPower Switch Reset SwitchPower Port Ethernet PortThis page left intentionally blank Performing a Quick Setup Accessing Quick Setup ScreensPage Internet Explorer Changing the Password Performing a Quick Setup This page left intentionally blank Viewing Modem’s Status Broadband Connection StatusPage Viewing the Modem’s Status Network Status Configuring4 Advanced Settings Accessing Advanced Setup ScreensPage Configuring Advanced Settings DSL Settings Dhcp SettingsSubnet Mask Beginning IP AddressEnding IP Address Lease TimeDNS Dynamic or Static LAN IP AddressDomain Name DNS ServerWAN IP Address Page Configuring Advanced Settings QoS Settings Upstream Destination QoS Settings Downstream QoS Status Remote Management/TelnetTelnet Timeout Setting Dynamic Routing Static RoutingUPnP Universal Plug and Play USB Port DetectionTime Zone Remote Syslog CaptureThis page left intentionally blank Configuring5 Security Settings Accessing Security ScreensPage Admin User Name and Password FirewallPage Low Applications Configuring Security Settings Page DMZ Hosting NAT Network Address TranslationPort Mapping Configuring6 Parental Controls Accessing Parental Control ScreensPage Services Blocking Website Blocking Schedule RulesConfiguring Parental Controls Page Configuring Modem’s Utilities Accessing the Utilities ScreensPage Restore Default Settings Configuring the Modem’s UtilitiesUpgrade Firmware Multiple PVCWeb Activity Log System Log OAM Ping Test Ping TestReboot LAN Connection Failure TroubleshootingTroubleshooting Cannot Connect to the InternetCMD Frequently Asked Questions Time out error occurs when entering a URL or IP AddressWhich connection speeds does the Modem support? Is the Modem flash-upgradeable? How do I do it?Which protocols does the Modem support? Will my Xbox work with the Modem?What is the valid IP range I can use for my home network? How do I find out what IP address my computer is using?How many computers can be connected through the Modem? What is the default username for the Modem?What is NAT and how does it protect my network? Does the Modem function as a firewall?Reference Locating Computer InformationLocating Windows Operating System Files Appendix a Reference Click Search Switching to Static IP On the Computer Windows 98 SEPage Do not include the periods they are automatically entered Enter the following numbers in the Subnet mask text box Windows Me Page Do not include the periods they are automatically entered Select Gateway, and, in the New gateway text box, enter Windows Page Appendix B Switching to Static IP on the Computer 192.168.1.64 Windows XP Page 192.168.1.64 Enter the following address in the Subnet mask text box Comparing DSL Service with a Dial-Up Modem Computer SecurityModem Security Computer SecurityElectronic Security This page left intentionally blank Specifications D GeneralLED Indicators EnvironmentalGlossary Page Appendix E Glossary Page Service Acronyms Service Acronym DefinitionsIMAP, IMAPv3 Ipsec IKE, Ipsec ESPSmtp This page left intentionally blank