# failed attempt
grep sshd.\*Failed /var/log/auth.log | less
# successful attempts
grep sshd.\*Accepted /var/log/auth.log | less
# failed attempt
grep sshd.\*Failed /var/log/auth.log | less
# successful attempts
grep sshd.\*Accepted /var/log/auth.log | less
http://www.apachetutor.org/admin/reverseproxies
https://www.digitalocean.com/community/tutorials/how-to-install-linux-apache-mysql-php-lamp-stack-on-ubuntu-16-04