Already you know the SSH server is the best secure and simple and easy way to connect with the remote servers, router, and switches. Using OpenSSH gives you One more layer of security.
At the time of installing we just too basic setup but you need to tweak more to get a highly secure way to connect.
Few tweaks are required to harden security So, you just need to follow me and change or update the setting according to your need.
How to achieve high secure OpenSSH server?
At the time of accessing a remote server, it requires authentication we provide the password which we had created at the time of installation.
In this scenario, an evil guy will make some kind of guess or brute force to gain access to your servers, and actually, this type of password can be easily gained by an evil guy.
So, you are thinking about what to do now? Take a sigh of relief, Thanks to the community we have the option to set up SSH as a passwordless Authentication.