Use openssh in LinuxAS4 to create the most secure remote login service

Article Title: Use openssh in LinuxAS4 to create the most secure remote login service. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

Test Tool download: http://bbs.chinaitlab.com/thread-319047-1-1.html

Note: This article mainly describes the most secure method of using ssh, that is, using RSA asymmetric encryption algorithm .... you can use the public key to encrypt data and use the private key to decrypt the data.

The following figure shows my topology:

1. Set up the experiment environment according to the topology, as shown in:

2. Install the vsftpd package to prepare for uploading the public key file, as shown in:

3. By default, openssh has been installed in LinuxAS4. You can run the following command to check whether it is installed. I have already installed openssh. Edit the main configuration file, as shown in:

4. Edit the configuration file, specify the listening port and IP address, and the valid protocol version, as shown in:

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