Disable SSH password authentication on your VPS

We will begin by editing your SSH servers configuration

file: /etc/ssh/sshd_config

vi /etc/ssh/sshd_config

Confirm the following lines are set to yes (these are normally enabled by default and may be commented out):

RSAAuthentication yes
PubkeyAuthentication yes

***Make sure your SSH keys are working properly. If they are not you will be unable to log back in via SSH!***

Now change the below line to disable PasswordAuthentication and only allow access for ssh keys.

PasswordAuthentication yes

change this to:

PasswordAuthentication no

Now lets restart the SSH service

service sshd restart

Your SSH server should now be locked down to only allow access via SSH key authentication.

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