Modify the SSH port and disable remote Root login in Linux

Article title: Linux modifies SSH ports and disables remote Root login. 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.

Modify ssh port 22 in Linux

Vi/etc/ssh/ssh_config

Vi/etc/ssh/sshd_config

Then, change the value to port 8888.

Service sshd restart (redhat as3) as root)

Use putty, port 8888

In Linux, the default SSH port is 22. for security reasons, modify the SSH port to 1433 as follows:

/Usr/sbin/sshd-p 1433

To enhance security

First, add a user with normal permissions:

# Useradd uploader

# Passwd uploader

// Set the password

The production machine prohibits ROOT remote SSH login:

# Vi/etc/ssh/sshd_config

Set

PermitRootLogin yes

Change

PermitRootLogin no

Restart sshd service

# Service sshd restart

For remote management, use uploader as the common user to log on, and then use su root to switch to the root user to obtain the highest permission.