EC2 instance safety instructions

  1. Add non-default user and add it to sudo group
    sudo adduser USERNAME
    sudo usermod -a -G sudo USERNAME
    # switch user
    su USERNAME
    
  2. Edit /etc/ssh/sshd_config
    # change port to non-default port ie 3434 
    # & add this port to your instance Security Groups > Inbound
    Port 3434
    
    # enable password authentication
    PasswordAuthentication yes
    
    # restart ssh
    sudo service ssh restart 
    
    ###
    # make sure you can login with 
    # your new username before continuing
    ###
    
    # disable root login without password by commenting: 
    #PermitRootLogin without-password
    
    # restart ssh
    sudo service ssh restart 
    
  3. Secure MySQL isntallation
    sudo mysql_secure_installation
  4. Reboot
    sudo reboot

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