How to disable logon to the QQ chat system

　　1. Use firewall to disable ports

The default port used by QQ is UDP 4000. If you use a firewall to close the port, you cannot use QQ. You only need to open the port when you need to access the Internet. The following describes my use of "Kingsoft network region 6". Click "Tools"> "comprehensive settings"> "IP address filtering"> "add" to bring up a new window. Enter "4000" in the "Port" column, select "UDP" in the "protocol" column, and select "Disable" in the "operations" column. In this way, UDP port 4000 is disabled. Once again, select "TCP" in the "protocol" column to disable TCP port 4000. We can see that UDP 4000 and TCP 4000 ports have been disabled. At this time, you can try again when logging on to QQ. Is it always unsuccessful! After a long time, the connection times out. Even if you reinstall QQ, you cannot log on successfully. If you want to use QQ, you can modify the above rules and change "forbidden" in the "operation" column to "allowed. It's not even time to go. Do not believe that you can open another QQ login window (that is, there are two QQ login windows at the same time) to try again, and soon the login was successful. Is the method we introduced useless? None! This is because when I log on to a computer for multiple times, the subsequent QQ port numbers will be 4001, 4002, and 4003, that is, each time I run a QQ, I will add 1 TO THE UPD port. Because we run two QQ programs at the same time, the port number of the second QQ program is UDP 4001 instead of UDP 4000. Of course, we can log on successfully. For the sake of insurance, we need to seal 4000 to 4009, and we can use nine ports. If your colleagues cannot log on to a QQ account, they will run 10 Logon Windows at the same time.

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　　2. Change the File Attribute under the QQ installation directory to write-only

During the running process, QQ needs to correctly load "LoginUinList. dat file, which stores the user's account information and writes some information in the logon process to the relevant files in the installation directory, by default, the QQ installation directory can be read and written. If you change the QQ installation directory attribute to "read-only", QQ will refuse to log on because it cannot write logon information during login. Operation Method: Find the QQ installation directory (C: Program FilesTencentQQ by default), right-click it, select "attribute" in the pop-up menu, and then in the pop-up window; set its properties to "read-only" and click "OK". A "Confirm attribute change" dialog box is displayed, and "Apply changes to this folder, subfolders, And Folders" is selected, the QQ number cannot be logged on again. When you need to use QQ, remove the read-only attribute of the installation directory and all files in the directory.

3. Edit the Hosts file

If you frequently access the Internet, you will find that every time you enter a URL in IE and press enter, a line of words will appear in the IE status bar: "Searching for a website ", sometimes it is very fast, but sometimes it is very slow. Generally, the first visit to the website is slower than the previous visit, this is the problem of domain name resolution.

As we all know, computers can only recognize binary characters. Therefore, IP addresses are introduced to identify each website. IP addresses are the digital addresses that identify your website on the network, just like 210.51.7.122, it is hard to remember. In order to be easy to remember, the domain name method is used instead of the IP address to identify the site address. Therefore, when we browse the desired website, we need to connect to the domain name resolution server (provided by service providers) to resolve the IP address before accessing the website. Therefore, it usually takes a lot of time. If we do not need to connect to the domain name resolution server and directly access the website, the speed will certainly be much faster. The Hosts file can accelerate the resolution of IP addresses and host names, thus improving the Internet access speed.

The local domain name resolution method is to store the website domain name and its corresponding IP address in a file, the file name is Hosts, the content storage format is: IP address domain name # comment, this file is stored in the C: Windows directory in Windows 98, and stored in Windows 2000 or XP in the path C: windowssystem32driversetc (assuming the operating system is installed in the C: disk ). When surfing the internet, we will first search for the Hosts file for resolution. If not, it will be parsed through the network service server. If we map all the servers of QQ to the wrong IP address and store it in the Hosts file, QQ cannot log on normally. Open the Hosts file in notepad, and then match the QQ server domain name with the wrong IP address in the format of "ip address domain name # comment" in the file to disable QQ.

The specific settings are as follows:

127.0.0.1 sz.tencent.com # disable QQ Server 1

127.0.0.1 sz1.tencent.com # disable QQ Server 1

127.0.0.1 sz2.tencent.com # disable server QQ 2

127.0.0.1sz3.tencent.com # disable QQ Server 3

127.0.0.1sz4.tencent.com # disable QQ Server 4

127.0.0.1sz5.tencent.com # disable QQ Server 5

127.0.0.1 sz6.tencent.com # disable QQ Server 6

127.0.0.1sz7.tencent.com # disable server QQ 7

127.0.0.1 sz8.tencent.com # disable QQ Server 8

Note that when you enter a ing record, a record occupies one line and the IP address and domain name must have spaces. To use QQ, you only need to modify the IP address corresponding to the QQ server domain name correctly. Or simply change the Hosts file to another name, and you don't need to change it to QQ.

　　4. deleting files prohibits QQ

First, you must log on to your QQ number once. Otherwise, you cannot use QQ after the following operations. Open the QQ installation directory, find the "WizardCtrl. dll" dynamic link library file in the installation directory, and delete or move the file to another directory. Note: There are two files with the same name in the installation directory. You must select the dynamic link library file installed in the main directory. If you delete the "WizardCtrl" in the "TMDlls" sub-folder. the dll file is invalid. After that, if someone enters a QQ number that is not in the list in the QQ Login Dialog Box, click the "login" button, the QQ program will be automatically closed and the running of the QQ program is prohibited, we can still use QQ!

The above four methods are both effective and easy to implement. The first method requires you to install a network firewall software on your computer, otherwise, port 4000 cannot be closed. The second method is to modify the file attributes in the QQ installation directory. Because it contains subfolders and all QQ files, it takes a long time to modify the host file. The modification is easy to avoid and the confidentiality is not strong. The third method is very practical. You do not need to modify the Hosts file, when you want to log on to QQ, you only need to change Hosts to another file name, and the switching speed is very fast. The fourth method is the best, because only your own QQ can log on, with great concealment, it is recommended to use. To fix QQ Internet access, the best security is to modify the Hosts file and disable the port. The disabling of these two methods has nothing to do with the QQ installation file, so it won't be easily discovered!