Securing Linux SSH

$ sudo vi /etc/ssh/sshd_config

# Run ssh on a non-standard port:

Port 2345 # Change the port as you want 

# Disable protocol 1

# Protocol 2,1

Protocol 2

# Prevent root logins:

PermitRootLogin no

# Limit user logins:

AllowUsers alice bob

# Disable password authentication forcing use of keys

PasswordAuthentication no

How to generate your own private key

$ ssh-keygen -t rsa

Written on November 11, 2016