Setup ISPConfig Web and Mail Server on Ubuntu 16.04

How to install ISPConfig 3.1 on Ubuntu 16.04 on a Digital Ocean Server incl. Apache as web server, Postfix as mail server, Pure FTPD as file server, Let's Encrypt for real SSL Certificates, MariaDB as database server, fail2ban to limit login attempts, and very much more. Please find all files and details on my blog @ https://www.niih.de/setup-a-digital-o... You can also order this setup as a service for your Server at https://service.niih.de Skip the blah blah and jump right in the terminal:    • Setup ISPConfig Web and Mail Server on Ubu...   Install ISPConfig with a Script:    • Setup ISPConfig Web and Mail Server on Ubu...   Install Mod Pagespeed, Mod GeoIP, Header, Expires, Cache:    • Setup ISPConfig Web and Mail Server on Ubu...   Configure Fail2Ban:    • Setup ISPConfig Web and Mail Server on Ubu...   Configure Postfix & SPF:    • Setup ISPConfig Web and Mail Server on Ubu...   Install & Configure Roundcube:    • Setup ISPConfig Web and Mail Server on Ubu...   Confiure phpMyAdmin URL:    • Setup ISPConfig Web and Mail Server on Ubu...   Configure the ISPConfig Interface, Postfix & PureFTPD to use a real Let's Encrypt certificate:    • Setup ISPConfig Web and Mail Server on Ubu...   Create DKIM Key for Mail Domain:    • Setup ISPConfig Web and Mail Server on Ubu...   Create a free Digital Ocean Firewall for your server:    • Setup ISPConfig Web and Mail Server on Ubu...   Create passive Port-Range for PureFTPD:    • Setup ISPConfig Web and Mail Server on Ubu...