Status checker for hundreds IP addresses

Question

I wonder how to make a status checker, checking about 500 addresses in a few minutes? (it\'ll check a certain port if its listening).

But I care about the performanc

Answer 1

As mentioned by kz26, nmap from command-line would be your best option. With PHP functions like system, exec, shell_exec, etc to capture the results for processing.

This guide should help you to get started http://www.cyberciti.biz/tips/linux-scanning-network-for-open-ports.html