What Is Dial-Up Internet Access?

In the 1990s, when the Internet was first available, one of the most common ways for people to access the Internet was dial-up. As long as the user has a personal computer, an external or built-in modem and a telephone line, then apply for his own account with the local ISP provider or purchase an Internet card, have his own username and password, and then pass Dial the access number of your ISP to connect to the Internet.

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In the 1990s, when the Internet was first available, one of the most common ways for people to access the Internet was dial-up. As long as the user owns a personal computer, an external or built-in

This means dialing in from a local phone

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Users using Chinese WIN95 need to install dial-up networking and network protocols after the MODEM is successfully installed. Computers using WINDOWS 3.2 can directly access the Internet after installing MSLC 3.01, because the related protocols and parameters are installed and set at the same time during the installation of IE 3.01.

Dial-up network installation

If you have installed Dial-Up Networking when you installed Chinese WIN95 in "custom" mode, you can skip this step and install the network protocol directly. But usually the "typical" way to install WIN95 is not included in the dial-up network, so you can add the following steps.

Step 1: Open the "Control Panel" in "Settings" from the "Start" menu, double-click the "Add / Remove Programs" icon, and click "Install Windows" in the "Add / Remove Program Properties" window that appears.

At present, China's dial-up Internet users basically use ADSL based on the PPPoE protocol. The full name of PPPoE is Point to Point Protocol over Ethernet, which is a protocol combining Ethernet and PPP protocols. Through PPPoE technology and broadband modems (such as ADSL Modem), personal identity verification of high-speed broadband networks can be achieved. Access, create a virtual dial-up connection for each user, so you can connect to the Internet at high speed.

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The ISA firewall is designed for TCP / IP and uses TCP / IP as the basis for all services. ISA firewall uses IP addresses to strictly define the network. However, ISA firewalls are facing enterprise-level networks. More fixed IP addresses are considered. For a network environment that dynamically obtains IP addresses, the compatibility is not good enough. . For example, when ADSL first connects to obtain an IP address, ISA will register this IP in the external network and bind the published service to this IP. After a period of time, the ISP side forcibly refreshes the ADSL connection, and the ADSL is disconnected by the ISP side. Although it can be automatically reconnected through dial-on-demand, but after regaining an IP address, the IP address obtained at this time and the registered ISA firewall The external IP addresses are inconsistent. At this time, the ISA firewall will be configured incorrectly. If a service is published, warnings about service publication failure and service publication recovery will also appear.