How LINUX modifies SSH port and forbids ROOT remote login

This article mainly explains how LINUX modifies the SSH port and forbids ROOT to log in remotely. Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how LINUX modifies the SSH port and prohibits ROOT from logging in remotely.

Linux modifies ssh port 22

Vi / etc/ssh/ssh_config

Vi / etc/ssh/sshd_config

Then change it to port 1234

Service sshd restart as root

To enhance security

First, add a user with normal permissions:

# useradd myuser

# passwd myuser

/ / set password

Production machine forbids ROOT remote SSH login:

# vi / etc/ssh/sshd_config

Put

PermitRootLogin yes

Change to

PermitRootLogin no

Restart the sshd service

# service sshd restart

Remote administration logs in with the normal user myuser, and then uses su-root to switch to the root user to get the highest privileges.

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