Comments on: 20 Essential SSH Configurations and Security Tips for Linux

By: John J. Smith

John J. Smith — Fri, 10 Oct 2025 05:10:49 +0000

Thanks for listening. I appreciate the update.

By: Ravi Saive

Ravi Saive — Mon, 06 Oct 2025 08:17:31 +0000

In reply to John J. Smith. @John, Thank you for your feedback! I’ve updated the article to include the latest method for changing the SSH port using systemd socket overrides for newer OpenSSH versions, while keeping the traditional sshd_config method for older setups. I also added notes about the differences in service names between Debian/Ubuntu (ssh) and RHEL/CentOS (sshd). Your input helped make the guide more accurate and up-to-date—much appreciated!

By: John J. Smith

John J. Smith — Fri, 03 Oct 2025 10:32:31 +0000

There are several parts of this article with outdated information.
To change the port, in the latest versions of open-ssh server, it is done through socket configuration. No longer honoring the change of port in the standard sshd_config.

sudo bash -c ‘cat > /etc/systemd/system/ssh.socket.d/listen.conf < [Socket]
ListenStream=
ListenStream=YOUR_NEW_PORT
EOF'

The service is under the name of ssh in Debian/Ubuntu based distros, sshd in RHEL/CentOs based distros.

Please update your article.

By: Andrew

Andrew — Sun, 12 Jul 2020 15:11:36 +0000

In reply to Himanshu Sain.

sshd_config is for daemon – ssh _server_ process working on host you connect to.

ssh_config is used to set up system-wide default settings for ssh command (ssh-client)

By: Himanshu Sain

Himanshu Sain — Wed, 04 Dec 2019 07:40:46 +0000

In Redhat OS, there are 2 files under /etc/ssh i.e sshd_config and ssh_config? What is the difference and what is the use of both files and for what purpose??