TCP Fast Scan – This is a very fast TCP port scanner for Linux that can scan multiple hosts and ports at once.

This is a very fast TCP port scanner for Linux that can scan multiple hosts and ports at once.

 

You can download it from the following link: https://packetstormsecurity.com/files/download/108731/tcp-fast-scan-2011-12-08.c

Source: https://packetstormsecurity.com/files/108731/TCP-Fast-Scan.html