Web proxy port scanner beta v1.1 – This code lets you port scan anonymously, by using a proxy server to bounce off of. If the proxy server connects to the host port, it returns a ‘200 OK’, like if there was a web server there, but then disconnects. The logs of the system scanned will show the proxy box and not the real person doing the scan.
You can download it from the following link: https://packetstormsecurity.com/files/download/14231/ppscan.c
Source: https://packetstormsecurity.com/files/14231/ppscan.c.html