Hi Bo! :-)

 BS> All the system tools like ipfw is there like it's under Freebsd.
Oh, ipfw is also there on OpenBSD and NetBSD, I think. No, wait, my NetBSD
install uses a tool called "ipf" to manage packet filtering
rules.

 PS>> They're not the same thing. Darwin (the lowlevel side 
 PS>> of MacOS X) is a BSD-like Unix, yes.
 BS> Yes, but I bet Darwin has it's origin in FreeBSD.
I wasn't doubting that it is based on the BSD codebase. ;)

Ciao
Pascal

--- Msged/LNX 6.1.1