Install and configure apache server:
sudo apt-get install apache2 apache2-utils libapache2-mod-php5
Configure Apache
Enable auth_digest module for ruTorrent authentication, SSL, and reqtimeout.
sudo a2enmod auth_digest ssl reqtimeout
Open apache2.conf
sudo nano /etc/apache2/apache2.conf
Edit or add the following lines:
Timeout 30 ServerSignature Off ServerTokens Prod