there's a wicked DOS with no real fix i believe, we used to run an efnet irc server on a freebsd box, kids figured out a way to send less than 5mbit worth of flooding into us, didn't overload the pipe or anything, but chewed CPU on the box like something fierce.. slowed it to a halt, almost was unresponsive remotely. top showed something like a 70-90% interrupt rate.. fucked up
the floods were so small and distributed, our network guy couldn't track them down, and there were efnet connections hitting our machine like mad too, never could figure out a way to block it
