Security problems, I think I have a hacker attacker.

[Christopher Joyner]

I think someone is attempting to get into my system.

Here is my details:  There are 2 login failuers on ttyv0,
And also 2 login failers on ttyv0 root.

I did not try login in on that terminal.  Are they able to try to do it away
from my computer, from a remote location?

Can someone tell me how to turn off the broadcast option for my lan, if it's
possible.  I think a server named chill is attacking me.