From the code: 'this code will spoof a fully open tcp/ip connection to a tartget host masquerading as another currently up/active host on the same network segment. this is done via arp spoofing to alter the tarets arp table. this avoids the real spoofed host tearing down the connection. with the targets arp tablel altered the initial three way handshake is preformed with both the MAC addresses and IP addys altered... this code will defeat all address based authentication (rlogin, rsh yadayada) but could also be used for the paranoid for example you could preform a remote buffer overflow attack against the target host and any logs will show the attack coming from the spoofed ip. be creative.