While developing some Java tools that use UDP broadcasting, I found
that my laptop will not broadcast packets back to the loopback device
*IF* I do not have a network connection (IP address assigned to one of
my interfaces) even if i turn on broadcasting and share ports. Does
anyone know if this is expected (or maybe undefined?) behaviour in
networking in general, a Java specific issue, a bug, or some other
option I have not listed?

Thanks!