Introduction to the principles of WAP monthly subscription and VPN connection

China Unicom CDMA (WAP monthly subscription) method on the Internet.
China Unicom's "interactive vision" Traffic monthly package (that is, WAP monthly package) on the Internet method.

I. Specific methods:
1. First install the driver of the CDMA Nic.
2. Install the VPN Client software and authentication certificate.
3. Insert the UIM card into the NIC and enable the CDMA Nic. Program .
Dialing #777
Account WAP
WAP Password
4. Enable the VPN software to connect to the VPN Server. A virtual private network between the user's computer and the server
After obtaining a dedicated IP address from your computer, you can connect to the Internet.
By using the VPN Server proxy, the WAP monthly subscription can achieve the same effect as the "bandwidth in the Palm.

Ii. Principles of Inernet on WAP monthly subscription card

The WAP monthly package is a monthly package for traffic when you use a mobile phone to access the Internet. Currently, all mobile phones have a WAP browser. Figure 1 mobile phone A and mobile phone B are all CDMA mobile phones with WAP browsers. The WAP browser is designed for small screens of mobile phones. It can only browse WML files, and most web pages on the network are in HTM format. To allow the mobile phone to browse these HTM files, the operator sets a "WAP Gateway" between the access device and the Internet. The mobile phone user will access the HTM file address and send it to the WAP Gateway, the WAP Gateway is running for you. Fetch the HTM file you want and convert it to the WML file format that the mobile phone can read before sending it to your mobile phone.

We use an example to describe that the user's mobile phone a dialing #777 account password is WAP and connects to the access device (vswitch, router, DNS server, etc.) of China Unicom through Base Station ). When the access device determines that the user is accessing WAP, it allocates an intranet address (a Class A private address starting with 10) to the user's mobile phone A and points the route to the WAP Gateway, user mobile phone a enters a website address on the WAP browser, such as Ghost, retrieves the page file (HTM, ASP, etc.), converts the file to a WML file, and sends it back to user mobile phone, at this time, mobile phone a can see the first page of the website http://www.link365.net. The data line in this process is the Green Line in the figure.

"Zhangzhong broadband" is a service for laptop users to access the Internet via CDMA dial-up wireless connection. Smart phones can use this service.
Its access number is #777, And the account password is card. We can use an example to illustrate the entire process.

A laptop user dials through a CDMA Nic #777, And the account password is card. Through Base Station A, the user establishes a connection with the access device and determines that the user is a card dial-up user, A public IP address (the unique independent IP address in the world) is assigned to the user's CDMA network card, and user data is directly routed to the Internet. In the IE browser, enter the first page of the notebook at http://www.link365.net. The line through which data passes is the red line in the diagram.

Laptop users can also directly dial #777 account and password WAP to access the Internet, set a proxy in IE browser, and all the data goes green. in this way, we can see some interfaces with messy frameworks that are suitable for reading by WAP browsers. Besides, they are limited to web pages and cannot be used by other network software.

3. How the WAP monthly subscription card works with the Internet on the VPN Server.

However, when the WAP monthly subscription card is used together with the VPN Server, you can enjoy the same high-price "Palm broadband" service at a low monthly cost.
To illustrate the principle, the first term is HTTPS.
"HTTPS is a secure communication channel developed based on HTTP and used for secure information exchange between the client's computer and server. It uses Secure Sockets Layer (SSL) for information exchange ."
HTTPS is used when you use a mobile phone to dial WAP to access the Internet, such as accessing online banking, sending account and password when logging on to an email, and so on, all of which must be encrypted over SSL and transmitted over HTTP.

The WAP Gateway provides Internet connections for Intranet users (WAP dial-up users), Web proxy for WAP browsers, and port 80 for HTTP connections. the second function is to convert the file requested by the user into a WML file. in this way, many network applications are restricted. however, encrypted data is transparently transmitted over the WAP Gateway using the HTTP protocol, and the WAP Gateway cannot modify the data. based on this principle, we can place an SSL-based VPN Server in the Internet cloud to open port 443 of the HTTPS connection.


Example: A laptop user first calls WAP to access the Internet, installs a VPN Client software, and generates a virtual network card. The virtual network card initiates a connection to the VPN Server on the Internet cloud through HTTPS, after a series of authentication, the notebook establishes a TCP connection with the VPN Server to form a virtual private network (VPN). The Notebook virtual network card obtains an IP address in the same network segment as the server virtual network card. the VPN Server is connected to the Internet as a gateway of the virtual private network.

Enter notepad in the laptop browser.