The machines on your network are often contacted by other machines for good reasons, such as exchanging e-mail, sharing files, browsing Web sites. But some contact may not always be good.
Hackers try to attack machines and networks for a variety of reasons.
They use their own tools and applications, like Back Orifice, to gain access and wreak havoc. They also use tools designed for good, like vulnerability scanners, to find out where networks are vulnerable and then use their hacking tools to gain access. It identifies attacks from Back Orifice, one of the nastier hacking applications currently being perpetrated on the Internet. BackOfficer Friendly also identifies other sorts of scans. Identifying the Bad Guys Back Orifice Back Orifice is a remote control penetration application originally produced and distributed by the Cult of the Dead Cow, a hacking group.