In this step you will ensure that the Web Browser works from another environment (e.g. workstation). To do this, the Debian VM will be used as the Web Server and another VM, e.g. CentOS, will be used as the client to do the browsing.
On Debian, use ifconfig or similar tools to find the IP address of the servers. Assume it is 192.168.1.123 in this case.
Start another VM with CentOS as the OS.
Start a browser in the CentOS VM (Ice Weasel or such).