Enable SSH Key based authentication and Disable Password Authentication in ssh
how to setup SSH key authentication and turn off password login
Overview: This article outlines how to secure SSH by enabling key-based authentication and disabling password login via the sshd configuration file.
Hardening Authentication in SSH
Step 1: Enable SSH Key based authentication and disable Password Authentication in sshd configuration file.
roo@gateway:~# vi /etc/ssh/sshd_config
PubkeyAuthentication yes
# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication no
Step 2: After making changes in the SSHD configuration file save it and restart SSHD
root@gateway:~# systemctl restart sshd
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Enable/Disable password or key based authentication
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