From my ISP, i have a block with different IP-addresses, which i can use on my server on the same NIC. Multiple IP-addresses are very useful, because in case of websites with SSL enabled (https://). Within ISPConfig, i added the additional IP-address for the website already and i selected it for the site. It is also clear to me how i can setup SSL for a website within ISPConfig, but i wonder what i have to do else. So here is my question: Is it also necesarry to change the /etc/hosts file end/or /etc/network/interfaces or even more...? I was also thinking about: ifconfig eth0:0 <additional-ip-address> Thanks in advance!