Hosts is a system file with no extension. It can be opened with tools such as Notepad. Its function is to establish a relationship between some commonly used URL domain names and their IP addresses. “Database”, when the user is in the browser When you enter a URL that needs to be logged in, the system will automatically find the corresponding IP address from the
Hosts file. Once found, the system will open the corresponding webpage immediately. If it is not found, the system will submit the URL to the DNS. The domain name resolution server performs IP address resolution. If we make a domain name change to it, then the computer will first read the domain name in the local
server, so as long as we deal with it, we can achieve the purpose of blocking harmful websites, thus effectively reducing Br> Less computer suffers from the threat of fishing and Trojan attack (of course, the effect of quick access)
Location of the hosts file: Find the Hosts file in the C:windowssystem32driversetc folder, open it with Notepad, first time http://hi.baidu.com/%C9%F2%D1%F4%CB%B6%CA%F3
If you change the UAC settings of Windows, you may encounter a situation that cannot be saved normally. There are two kinds of situations. Solution
Solution 1: Use WordPad to open and save. After my practice, use WordPad to modify and save the hosts file without enabling the user account.
Solution 2: Click the Start menu - All Programs - Accessories, find the Notepad option, right click to run as administrator, and then modify the hosts file.
Hosts is a system file with no extension, which can be opened with tools such as Notepad. Its function is to establish a relationship between some commonly used URL domain names and their corresponding IP addresses. "Database", when the user is in the browser When you enter a URL to log in, the system will automatically find the corresponding IP address from the Hosts file. Once found, the system will immediately open the corresponding web page. If it is not found, the system will submit the URL to the DNS domain name resolution server for IP address. Analysis.
1. Speed up domain name resolution
For websites that need to be visited frequently, we can improve the domain name resolution speed by configuring the mapping between domain name and IP in Hosts. Thanks to the mapping, when we enter the domain name computer, we can quickly resolve the IP without requesting a DNS server on the network.
2, convenient LAN users
In many units of the LAN, there will be servers available to users. However, since the DNS server is rarely set up in the local area network, when accessing these servers, it is necessary to input a hard-to-remember IP address. This is quite troublesome for many people. Now you can give these servers a name that is easy to remember, and then create an IP mapping in Hosts, so that when you access it later, just enter the name of the server.
3. Blocking Websites
There are many websites that install a variety of plugins into your computer without the user's consent. Some of them may be Trojans or viruses. For these sites we can use Hosts to map the domain name of the site to the wrong IP or IP of the local computer, so there is no need to access it. In the WINDOWSX system, the agreement 127.0.0.1 is the IP address of the local computer, and 0.0.0.0 is the wrong IP address.
If, in Hosts, write the following:
127.0.0.1 #Website to be blocked A
0.0.0.0 #Website to be blockedB
This way, the computer resolves domain names A and B When it resolves to the local IP or the wrong IP, it achieves the purpose of blocking websites A and B.
4, smooth connection system
For Lotus server and some database server, if you directly enter the IP address during access, it is not accessible, you can only enter the server name to access. Then we configure the Hosts file so that the server name can be successfully connected.