One of today's most popular penetration testers is the freely available Metasploit, which allows hackers and security professionals alike to examine how vulnerable a given system is to known exploits and payloads.
This month, Peter Giannoulis of http://theacademy.ca demonstrates how the tool can be used to test commercial and custom-made applications, servers and operating systems.
For more information about the tool you've seen here:
About the author: Peter Giannoulis, GSEC, GCIH, GCIA, GCFA, GCFW, GREM, CISSP, is an information security consultant in Toronto, Ontario. He currently maintains www.theacademy.ca, which provides organizations streaming video on how to configure and troubleshoot many of today's top security products. He also serves as a technical director for GIAC.