How to modify port 22 in Linux

Article Title: how to modify port 22 in Linux. 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.

First:

01 if you want to change the SSH default Port (22), you only need to modify Port 22 in/etc/ssh/sshd_config. Here, change 22 to the Port you want to set, but do not set the same port as the existing port to avoid unknown consequences.

02 if you want to restrict the SSH Login IP address, you can do the following:

First: Modify/etc/hosts. deny and add sshd: ALL

Then, modify:/etc/hosts. allow and set sshd: 192.168.0.241 as follows:

In this way, only the IP address 192.168.0.241 can be bound to log on to the LINUX machine through SSH. Of course, as a server, I do not install gnome or KDE, and many things do not, which increases the security factor.

Second:

First, modify the configuration file.

Vi/etc/ssh/sshd_config

 

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