Weak port 22 password and SSH connection Program

Port 22 weak password and SSH connection Program-Linux Enterprise Application-Linux server application information. The following is a detailed description. Many of my friends may have scanned port 22 and discovered a weak password, but did not know how to connect it. In fact, this is very simple. Let's talk about port 22 first, first, if the system opens port 22, it can be roughly determined that the server is using the Linux operating system, or it may be Unix. The service name corresponding to port 22 is SSH, and the full name is Secure SHell, the Chinese character can be understood as "encrypted data transmission", because normal data transmission methods such as FTP and HTTP do not encrypt the data to be transmitted during transmission, that is to say, any user can read the plain text without any effort as long as they can intercept these packets. The read plain text may include the user name and password! But SSH is different. It has started to encrypt data packets at the application layer of the system, and uses the DSS Algorithm for incremental encryption, this encryption algorithm can obtain a large number of possible keys and avoid key collisions, resulting in high security! Even if the listener successfully intercepts all the data, the encryption mechanism of DSS can greatly ensure data security.

The program will prompt you to enter the account and password. If everything goes well, you will be directed to the target system, just like Telnet. However, the system here is Linux or Unix, and the operations are different. You can use the pwd command to view your own directory, and then use the who command to check who is logged on to the current system.