NETGEAR NMS100 manual Domain Name DoS, Dynamic Host Configuration Protocol

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Reference Manual for the ProSafe Network Management System NMS1000

The DMZ sits between the Internet and an internal network's line of defense, usually some combination of firewalls and bastion hosts. Typically, the DMZ contains devices accessible to Internet traffic, such as Web (HTTP) servers, FTP servers, SMTP (e-mail) servers and DNS servers.

DNS

Short for Domain Name System (or Service), an Internet service that translates domain names into IP addresses.

Because domain names are alphabetic, they're easier to remember. The Internet however, is really based on IP addresses. Every time you use a domain name, therefore, a DNS service must translate the name into the corresponding IP address. For example, the domain name www.example.com might translate to 198.105.232.4. The DNS system is, in fact, its own network. If one DNS server doesn't know how to translate a particular domain name, it asks another one, and so on, until the correct IP address is returned.

Domain Name

A descriptive name for an address or group of addresses on the Internet. Domain names are of the form of a registered entity name plus one of a number of predefined top level suffixes such as .com, .edu, .uk, etc. For example, in the address mail.NETGEAR.com, mail is a server name and NETGEAR.com is the domain.

DoS

A hacker attack designed to prevent your computer or network from operating or communicating.

DSL

Short for digital subscriber line, but is commonly used in reference to the asymmetric version of this technology (ADSL) that allows data to be sent over existing copper telephone lines at data rates of from 1.5 to 9 Mbps when receiving data (known as the downstream rate) and from 16 to 640 Kbps when sending data (known as the upstream rate).

ADSL requires a special ADSL modem. ADSL is growing in popularity as more areas around the world gain access.

DSLAM

DSL Access Multiplexor. The piece of equipment at the telephone company central office that provides the ADSL signal.

Dynamic Host Configuration Protocol

DHCP. An Ethernet protocol specifying how a centralized DHCP server can assign network configuration information to multiple DHCP clients. The assigned information includes IP addresses, DNS addresses, and gateway (router) addresses.

EAP

Extensible Authentication Protocol is a general protocol for authentication that supports multiple authentication methods.

EAP, an extension to PPP, supports such authentication methods as token cards, Kerberos, one-time passwords, certificates, public key authentication and smart cards. In wireless communications using EAP, a user requests connection to a WLAN through an AP, which then requests the identity of the user and

Glossary

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September 2004 202-10036-01

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Contents NETGEAR, Inc September 2004Customer Support World Wide Web TrademarksStatement of Conditions Contents Chapter Data and Statistics Appendix a Contents Manual Scope Audience, Scope, Conventions, and FormatsTypographical Conventions Overview Other ProSafe NMS FeaturesRecommended system requirements Device Access ModesProSafe Network Management System System RequirementsPackage Contents Introduction Introduction Installing the ProSafe NMS Server and Local Console Chapter Installation and StartupStarting the ProSafe NMS Server and Local Console Installing the Air Messenger Pro Paging SoftwareStopping and Starting the Server Disabling Automatic Console LoginStarting a Local Console Session Element Function Console ElementsMain button bar Edit button bar Selection Tool Event Log ToolZoom to Console Button CommandsSelection Tab Description Selection ToolEvent Log Tool Selection Tool tabsView Window Area Installation and Startup Map Selection Tree Working with the Map DatabaseRectangle Using Map View WindowsView All Zoom Out ZoomMoving Objects at the Root Level Moving Map ObjectsAutomatically arranged and manually arranged submap levels Moving Objects Inside Subnet LevelsMoving Objects from One Subnet to Another Attributes Changing Object PropertiesAttribute Name Description Access ParametersObject Properties Access tab Type-Dependent Attributes Object Attribute Name Description Type a Object Properties Attribute tabType Description Adding Map ObjectsObject Types Manage Menus Viewing Device MIB DataMIB Selection Tree Custom Menus Table Display ElementsGraph Styles Graph Display ElementsCreating a New Report Saving Long-term StatisticsViewing Trend Data in a Graph Window Limiting Saved Instances Alarm Type Description Setting Threshold AlarmsThreshold Alarms Configuring Automatic Alarms Setting Status Variable PollingSetting Manual Threshold Alarms TCP Service Polling Polling TCP Application ServicesDiscovery of Four Built-in Services Managing Polling for the Device Custom TCP Service PollingTo modify an existing Custom TCP Service definition Emailing or Paging the Administrator on an EventThen, set the Email/Paging global event options Add an Event Filter for the pollDeviceDown event Then, set the Email/Page event actions Event Subtree Trap Name Description Other Event TypesProSafe NMS Events First, add a grouped set of users Emailing or Paging Multiple UsersThen, add an Event Filter for the selected devices Normal Discovery Map Layout Troubleshooting Network DiscoveryDuration of Network Discovery Sample top-level and Subnet Map views for a small network Failure Symptoms and SolutionsIncorrect or Missing Community Names Discovery Agent Fails to Connect to the ServerNot Enough Seeds Snmp Device Access Control ListFirewalls Block Snmp Operations Limiting the Scope of Discovery Setting Up New FiltersBroadcast Packet Losses Stopping Discovery Auto-Layout Event Description Parameters Event ParametersEvent Parameters Set Community name of the target device List of Glossary Terms Cat Denial of Service attackAuto Uplink Domain Name DoS Dynamic Host Configuration ProtocolInternet Protocol GatewayIP Address Mbps Lightweight Directory Access ProtocolLocal area network MAC addressPerfect Forward Secrecy NetBIOSNetwork Address Translation PacketRouter PPPoEPPP over ATM PPP over EthernetSubnet Mask Wide area network Wi-Fi Windows Internet Naming ServiceUniversal Plug and Play WEB Proxy ServerWireless Network Name Ssid Index Index Index
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