Generally speaking, dial-up access refers to what is used to connect to the Internet server.

Generally speaking, dial-up access refers to connecting to the Internet server through the "public telephone system"; dial-up access means that the user uses a personal computer, an external or built-in modem and a telephone line to connect to the Internet. The local ISP provider applies for its own account, has a username and password, and connects to the Internet by dialing the ISP's access number.

The operating environment of this tutorial: Windows 10 system, DELL G3 computer.

Generally speaking, dial-up access refers to the method through which the Internet server is connected.

Generally speaking, the dial-up Internet access refers to the connection with the Internet server through the "public telephone system".

Dial-up Internet access means that the user uses a personal computer, an external or built-in modem and a telephone line, and then applies for his own account from the local ISP provider, or purchases an Internet card, and has his own After entering your username and password, then connect to the Internet by dialing your ISP's access number.

This refers to the steps and operation content of joining the Internet through local telephone dialing, from dialing 163XX (169XX) to being able to "walk" online. The steps and operation content of getting online are as follows:

• Install MODEM

• Install dial-up network

##Install TCP/IP network protocol
Install MSIE or Netscape Navigator browser to establish Internet connection
Run MSIE or Netscape Navigator
Set up E-mail dial-up login, Roaming the Internet

Expand knowledgeProblems with dial-up Internet access

China domestic dial-up Internet access Users basically use ADSL based on PPPoE protocol. PPPoE stands for Point to Point Protocol over Ethernet (Point-to-Point Protocol on Ethernet). It is a protocol that combines Ethernet and PPP protocols. Personal identity authentication on high-speed broadband networks can be achieved through PPPoE technology and broadband modems (such as ADSL Modem). Access, creating a virtual dial-up connection for each user so they can connect to the Internet at high speed.

ISA firewall is designed for TCP/IP, and uses TCP/IP as the basis for all service operations. ISA firewall uses IP addresses to strictly define the network, but ISA firewall faces enterprise-level networks and considers more fixed IP addresses. For network environments that dynamically obtain IP addresses, although it supports compatibility, it is not good enough. . For example, when the ADSL connection obtains an IP address for the first time, 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 ADSL is disconnected by the ISP side. Although it can be automatically reconnected through demand dialing, after re-obtaining an IP address, the IP address obtained at this time is the same as that of the ISP side. If the external IP address registered in the ISA firewall is inconsistent, a configuration error will occur in the ISA firewall. If a service is published, a warning will appear indicating that the service publishing fails and the service publishing resumes.

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