Chapter 7. Dynamic Dns; Overview; Managing Ddns - Motorola WS5100 Series Migration Giude

This chapter provides detailed feature and configuration information for the Dynamic DNS feature:
•

Overview

•

Managing DDNS

• Configuring DDNS using the CLI
• Configuring DDNS using SNMP
• Configuring DDNS using the Web UI
7.1 Overview
The Domain Name System or Domain Name Server (DNS) is a system that stores information associated with
domain names in a distributed database on networks, such as the Internet. The domain name system
(Domain Name Server) associates many types of information with domain names, but most importantly, it
provides the IP address associated with the domain name. It also lists mail exchange servers accepting e-
mail for each domain. In providing a worldwide keyword-based redirection service, DNS is an essential
component of contemporary Internet use.
7.2 Managing DDNS
Dynamic DNS is a method of keeping a domain name linked to a changing IP address. Typically when a user
connects to a network the users ISP assigns it an unused IP address from a pool of IP addresses (Usually done
through DHCP server). This address is only valid for a period of time. This way of dynamically assigning IP
addresses increases the pool of assignable IP addresses. DNS is a service, which maintains a database to
map a given name to an IP address, which is used for communication on the Internet. The dynamic
assignment of IP addresses makes it necessary to update the DNS database to reflect the current IP address
Dynamic DNS