Dynamic Server: About ddns network communication technology

What is ddns network connection?
According to statistics, for the vast majority of Enterprise leased line users, the total time for data flow on the leased line is no more than 8 hours. This means that a leased line user has to pay 2/3 of the time every day instead of using network resources. The price of leased lines remains high, so that ordinary enterprise users are discouraged. Therefore, the ideal way for enterprises to access the Internet is to access the Internet only when their websites are accessed, or when they want to access the Internet. This saves a lot of Internet fees. The ddns Network Access System provides this dynamic access service.
What are the components of the ddns network connection?
Ddns network communication is a three-part integrated solution, including:
• Ddns Server
A Transformed Domain Name Server software running on the Internet, which is responsible for receiving domain name requests on the Internet and sending dial-up requests to the dial-up server if necessary. At the same time, it is responsible for managing the registered users of the ddns system and receiving online registration after the users access the internet.
• Dial-up Server
The dial-up server is responsible for receiving dial-up requests from ddns and accessing users through public telephone network calls.
• Ddns customers
Receives call requests from the dial-up server, performs dial-up Internet access, and registers online on the ddns server.
Use the ddns system to implement the VPN Function
Assume that lan 1 is not on the Internet. While LAN 2 needs to connect to lan 1 and establish a virtual LAN.
1) The ddns client in LAN 2 first initiates a request to www.mynet1.com. Www.mynet1.com is the domain name of ddns customer of lan 1.
2) After receiving a domain name request from www.mynet1.com, The ddns server first checks whether the user corresponding to the domain name is on the Internet. If not, request the dial-up server to call the ddns client of lan 1.
3) the dial-up server calls the ddns customer in LAN 1.
4) ddns customers in LAN 1 receive a call request and access the Internet through dialing.
5) in LAN 1, The ddns client registers with the ddns server and notifies the ddns server of the IP address after the dial-up.
6) The ddns server responds to the DNS request sent by LAN 2.
7) connect two local networks to establish a VPN connection.
Note: As LAN 2 can also implement the on-demand dial-up Internet access (DOD) function, a ddns client is also required.
Browser user
Similar to the VPN application process, browser users (such as a salesman using a laptop) can exchange data directly with computers in the LAN through the ddns system. This solution can also be used for network interconnection between enterprises and suppliers and customers.
Technical Features of ddns
Saves user costs
• You do not need to apply for a fixed IP address for accessing the Internet.
• Use dial on demand technology to achieve on-demand Internet access, greatly saving access costs.
Easy to use
• The entire process of ddns service connection is automatically completed by the device, and you do not have to perform any operation.
Provides a variety of value-added services
• The ddns system is equipped with software modules such as Nat, VPN, and Webserver to realize the proliferation of remote IP phones and netmeeting.

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