knocker 0.6.6-Win32 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. You can set up knocker on Windows XP/7/8 32-bit. This free software is an intellectual property of Gabriele Giorgetti. The most popular versions of the knocker are 0.7 and 0.6. The software lies within Internet & Network Tools, more precisely Network Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
Knocker is a simple and easy to use TCP security port scanner written in C to analyze hosts and all of the different services started on them. It is available for Linux, FreeBSD, HP-UX, and Windows9x/2000/NT and it is licensed under the GNU General Public License GPL.
You may want to check out more software, such as KARATE MASTER Knock Down Blow, Slumberfish or Space Googy, which might be similar to knocker.
Personal Security
Network tools