I appear to be attacking others

[jep at obrien-pifer.com (James Pifer)]

It looks like my CentOS 4.2 box is attacking other people with some type
of ftp attack. I got an email from somebody saying they were being
attacked by my IP address. 

Further investigation /var/log/messages shows a whole bunch of sshd
attacks on me, none of which appear successful. I'm running ethereal
right now and I can see that my system is doing some kind of ftp attacks
on others. 

I've think I've stopped the outgoing attacks at my firewall, but how do
I proceed from here?

Thanks,
James