3 3 8 9 password sniffing-vulnerability warning-the black bar safety net

Arp spoofing plus sniffing, play black friends must not unfamiliar, we play the most is in the same network sniffing the ftp password, so generally like penetration of the main station to open a ftp, but more often is the main station on 3 3 8 9 more likely to than ftp large bar, if you can direc...