I apologize if this question has been raised before; I did perform a search (and it returned 12 pages, with no relevant results in the first four). I am wondering about the logic behind preventing two websites from having the same domain name -- when the IP addresses on which to listen are different. I'm sure someone is thinking, "Why would you ever want to do that?" I want to do it because I am migrating a website from one IP address to another IP address -- on the same server/ISPConfig installation. Ideally, I would create identical websites -- one on each IP address -- so that once I update the DNS record (hosted externally), it doesn't matter which IP address the site-visitor hits when he visits the domain in question. The user experience should be the same for each IP address. Is there a technical reason for which Apache cannot accommodate this setup? Wouldn't it be perfectly valid to do something like this in the Apache configuration? Code: <VirtualHost 18.104.22.168> DocumentRoot /www/example ServerName www.example.com </VirtualHost> <VirtualHost 22.214.171.124> DocumentRoot /www/example ServerName www.example.com </VirtualHost> If I try that locally, Apache does not throw warnings/errors, and pages continue to be served from localhost without issue. Thanks for any insights.