EC2 instance safety instructions

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  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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