Shulou(Shulou.com)06/03 Report--

In this issue, the editor will bring you about what is the default port of telnet. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

The default port of telnet is "23". The way to view the port under windows is as follows: first, click "start →"; then open a command prompt window; then enter the command "netstat-a-n"; finally, press enter to view the port number.

On UNIX/Linux systems, the default port for the telnet service is 23, and the default port number for the ftp service is 21. However, as a UNIX/Linux system administrator, it is best not to use the default port, but to use a different service port. It will be safer this way.

View Port

To view ports in windows 2000/xp/server 2003, you can use the netstat command:

Click "start → run", type "cmd" and enter to open a command prompt window. Type "netstat-a-n" at the command prompt and press enter to see the port number and status of the tcp and udp connections displayed in numeric form.

Little knowledge: netstat command usage

Command format: netstat-a-e-n-o-s

-a shows all active tcp connections as well as the tcp and udp ports that the computer is listening on.

-e shows the number of bytes, packets, and so on sent and received by Ethernet.

-n indicates that only the address and port number of all active tcp connections are displayed numerically.

-o shows the active tcp connection and includes the process id (pid) for each connection.

-s indicates that statistics for various connections are displayed by protocol, including port numbers.

The above is what the editor shares with you what is the default port of telnet. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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