Ways to turn off 212325 ports under windows

Port 21 is primarily used for FTP (file Transfer Protocol, Files Transfer Protocol) services.

Port Description: 21 port is mainly used for FTP (file Transfer Protocol, Files Transfer Protocol) service, FTP service is mainly in order to realize file upload and download between two computers, one computer as FTP client, another computer as FTP server, You can log on to the FTP server in two ways, using anonymous (anonymous) Logins and authorization username and password logins. At present, through the FTP service to achieve file transmission is the Internet upload, download files The most important method. These servers have a read-write directory. Hackers or crackers use these servers as a node to transmit warez (private programs) and pr0n (intentionally misspelled words to avoid being sorted by search engines).

Close Port 21

First, click "Start"--"settings"--"control", select "Administrative Tools", and double-click to open.

Second, in the "Administrative Tools" interface, select "Services", double-click Open.

In the list of services in the Services dialog box, locate the FTP Publishing service.

Four, right click, select Properties.

In the FTP Publishing Properties dialog box, change the Startup type to Manual.

Click the Stop button, change the service status to stop, and click OK to complete the setup.

Port 23 is primarily used for Telnet (telnet) services and is a popular logon and emulator on the Internet.

Port Description: Port 23 is mainly used for Telnet (telnet) service, is commonly used on the Internet logon and simulation program. You also need to set up the client and server side, and the client that opens the Telnet service can log on to a remote Telnet server with an authorized username and password. Once logged in, the user is allowed to use the Command Prompt window to do the appropriate action. In Windows, you can type the telnet command in the Command prompt window to use Telnet remotely.

Operational recommendations: Using the Telnet service, hackers can search for remote logins to UNIX services, scan the operating system type. And there are several serious vulnerabilities in the Telnet service in Windows 2000, such as elevated permissions, denial of service, and so on, which can crash a remote server. The 23 port of the Telnet service is also the default port for the TTS (Tiny Telnet Server) Trojan. Therefore, it is recommended to close port 23.

Close Port 23

First, click "Start"--"settings"--"control", select "Administrative Tools", and double-click to open.

Second, in the "Administrative Tools" interface, select "Services", double-click Open.

Third, in the Services dialog box, in the list of services, locate the Telnet service.

Four, right click, select Properties.