Cleaning data off a remote machine

[Chris Hastie]

I'm about to give up a FreeBSD dedicated server and would like to make sure I
don't inadvertantly leave any bits of sensitive data on it. What is the best
way to remove all data from the hard drive? I have no problem if this removes
the OS along the way, but ideally I would like to be able to do what ever I do
from an SSH session. If there's no alternative I can arange KVMoIP console
access.

Thanks

-- 
Chris Hastie