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Dynamic Domain Name System
 

Dynamic Domain Name System

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    Dynamic Domain Name System Dynamic Domain Name System Presentation Transcript

    • welcome “ DYNAMIC DOMAIN NAME SYSTEM ” presented by: soni kumari
    • Contents Domain name system Services provide by DNS Dynamic domain name system Why we use DDNS Application of DDNS Limitation of IP solution How can I impl. DDNS 1 2 3 6 7 5 4 8
    • DOMAIN NAME SYSTEM
      • DNS is an Internet Engineering Task Force (IETF) standard name service that allows your computer to register and resolve domain names.
      • The DNS makes it possible to assign domain names to organizations independent of the routing of the numerical IP address.
      • In other words, DNS is a system that translates domain names into IP addresses.
    • Services provide by DNS Mail server aliasing services ThemeGallery is a Design Digital Content & Contents mall developed by Guild Design Inc. Host aliasing Load Distribution
    • DYNAMIC DOMAIN NAME SYSTEM
      • Dynamic DNS is a technology that allows you to update the IP address of a domain in real time.
      • Dynamic DNS makes it possible for people and other websites to connect to a particular server without having to track that server's IP address.
    • Continue …..
      • The DNS master file must be updated dynamically. The Dynamic Domain Name System (DDNS) therefore was devised to respond to this need. In DDNS, when a binding between a name and an address is determined, the information is sent, usually by DHCP to a primary DNS server. The primary server updates the zone. The secondary servers are notified either actively or passively.
    • Application of DDNS
      • DNS is its use in conjunction with DHCP, the Dynamic Host Configuration Protocol.
      • Dynamic DNS is to provide static host names for dialup customers of ISPs.
    • Why we use DDNS?
      •   A dedicated server usually runs DNS with a static IP address. It would be a problem if Google's IP address changed constantly.
      • An extra service runs on the host machine and monitors the IP Address.
      • When it changes, the Dynamic DNS service automatically takes notice, and updates the DNS record on the DNS server.
    • How can DDNS be used Today?
      • BIND-8, released by the Internet Software Consortium in May of 1997, includes some support for Dynamic DNS as specified in RFC2136.
      • It does not currently include the authentication mechanism that is described in RFC2137, however, meaning that any update requests received from allowed hosts will be honored.
    •  
    •  
    • How Can I Implement Dynamic DNS?
      • A server operator can implement Dynamic DNS on nearly any computer server with a minimum of setup requirements.
      • All one must do is simply change the maximum caching time, or the time intervals between caching of a domain, to a very short period.
    • The Limitations of Working with Dynamic IP Addresses
      • This results in the following problems:
      • It is not possible to create a fully meshed VPN community with dynamic IP gateways, since gateways will not know how to reach each other.
      • The gateway’s owner cannot run public Web servers.
      • Remote Access VPN users cannot connect to the gateway’s Remote Access VPN Server.
    • The Dynamic DNS Solution
      • Dynamic DNS (DDNS) solves this problem by allowing you to assign a domain name to a gateway with a dynamic IP address.
      • It is possible to create a fully meshed VPN community between all dynamic IP gateways, based on the DDNS information.
      • External users are able to access a Web server behind the gateway, using the DNS
    • ANY QUERY? Thank You !