Do you have one virtual machine and on this machine you installed ispconfig and then you created three websites?
This is exactly what I have done.
I am currently testing the setup to look at the sites before I put it in production with full DNS records. ( I currently have another server hosting the sites) I was just wondering if there was a way to pull the sites up in a web browser on the machine that is hosting the virtual machine in order to double check things. If I enter the IP address, it shows the default index.html and if I put in the domain name, it resolves to the host that is currently hosting the site.
If I need to just put it in service and troubleshoot at that time, I can do that. I was just trying to figure out another way.