Hosts Up is a collection of small PHP scripts and HTML documents I've made to help me keep track of live hosts on my network at home and at work. Each time the webpage is refreshed a new ping sweep on the network is performed. To see which ports are open one can just click on a host and another script fires up an Nmap scan of the host. The result is showed on the webpage. Both the ping sweep and scans are using Nmap. Hence Nmap is required aswell as PHP's ability to exeucte Nmap.
