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[linux] CentOS modifies the default 22 port for SSH

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Posted on 12/30/2021 8:30:08 PM | | | |
SSH is an abbreviation for Secure Shell, developed by the IETF's Network Working Group. SSH is a security protocol built on top of the application layer. SSH is a more reliable protocol that provides security for remote login sessions and other network services. Utilizing SSH protocols can effectively prevent information leakage during remote management. SSH started as a program on UNIX systems and quickly expanded to other operating platforms. SSH closes vulnerabilities in the network when used correctly. The SSH client works with multiple platforms. SSH runs on virtually any UNIX platform—including HP-UX, Linux, AIX, Solaris, Digital UNIX, Irix, and others.

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CentOS modifies 22 default ports SSH default ports
https://www.itsvse.com/thread-2657-1-1.html

First, turn off and disable the firewall to prevent the connection from being unable to connect after changing the new port number (or adding firewall rules to release the port), the command is as follows:


The default ports for SSH are:22, we modify the port to:2021, the command is as follows:



After the modification is complete, restart the SSH service with the following command:

(End)




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Posted on 12/31/2021 3:07:36 PM |
Very good, very nice
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