For configuring ISPConfig I would like to have a website which has a name as: https://subdomain.domain.tld:81. So I entered the following information: Code: Please enter the host name (e.g. www): Please enter the domain (e.g. xyz.de): subdomain.domain.tld Please select the protocol (http or https (SSL encryption)) to use to access the ISPConfig system: 1) HTTPS 2) HTTP Your Choice: 1 (The first question don't have any answer, because I don't want to like https://www.subdomain.domain.tld:81. When I switch to my Linux machine, I can´t access the URL. What is going wrong?