This tutorial shows how to set up an Ubuntu Hardy Heron (Ubuntu 8.04 LTS) server that offers all services needed by ISPs and hosters: Apache web server (SSL-capable) with PHP and Ruby, Postfix mail server with SMTP-AUTH and TLS, BIND DNS server, Proftpd FTP server, MySQL server, Courier POP3/IMAP, Quota, Firewall, etc.