From the doc: 'a very small script that exploits the smurf bug. In real words smurfing is the technique in which many clients connect to a prefixed host to slow it up or, in best cases, force it to crash! This script instead, tries to connect a lot of times to a ftp server and by creating a lot of dirs tries to fill server disk! Obviously this works for ftp server that provide a free public space where upload files (the 90percent of servers). Moreover it send, for each connection opened, a 'cd..' command that if it's reapeated many times (10000 in this script) will request a lot of Ram forcing the server to slow down!!!'