Knocker is a simple, versatile, and easy-to-use TCP security port scanner written in C, using threads. It is able to analyze hosts and the network services which are running on them. It is available for Linux, FreeBSD, Unix, and Windows95/98/2000.
License
GNU General Public License version 2.0 (GPLv2)Follow knocker
Other Useful Business Software
$300 in Free Credit Towards Top Cloud Services
Start your project in minutes. After credits run out, 20+ products include free monthly usage. Only pay when you're ready to scale.