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This article mainly introduces "how centos7 modifies ssh remote port". In daily operation, I believe many people have doubts about how centos7 modifies ssh remote port. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how centos7 modifies ssh remote port". Next, please follow the editor to study!

As we all know, the default remote port of the Linux system is 22. If you haven't changed the ssh port, you will find a lot of violent login information if you check the log. So it is very insecure for Linux to use the default ssh remote port. Today I will teach you how to modify the ssh port.

Experimental environment: centos7

Remote tool: xshell

First, we log in to the server remotely

Use vi to edit sshd configuration files

Command: vi / etc/ssh/sshd_config

Press I to enter insert mode and change the port number

Before modification:

After modification:

Firewalld opens ssh port

Command:

1.firewall-cmd-- zone=public-- add-port=ssh port / tcp-- permanent (--permanent is in effect permanently and becomes invalid after restart without this parameter)

2. Firewall-cmd-reload (update firewall rules)

Restart the sshd service

Command: systemctl restart sshd

Test remote (server security group remember to open, security group open, please refer to: https://cloud.tencent.com/document/product/213/15377)

At this point, the study on "how to modify the ssh remote port by centos7" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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