portchk.c – Simple port checker that either takes command-line input or file input and checks each host if a given port is open.

Simple port checker that either takes command-line input or file input and checks each host if a given port is open.

You can download it from the following link: https://packetstormsecurity.com/files/download/10914/portchk.c

Source: https://packetstormsecurity.com/files/10914/portchk.c.html