I'm looking for an open source/free network emulator tool that I could use on Mac OS X, to simulate a slow network connection, limited bandwidth and other network characteristics such as dropped packets etc for both UDP/TCP connections (or even on the physical layer).
I'm looking for the simplest solution that would allow me to run TCP/UDP servers and have a few clients connect to them on localhost emulating various network connections.
I'm mainly wondering if I can use something like Linux's
netem on Mac OS X (or even better cross-platform Windows/Linux/Mac).
Perhaps I can run VirtualBox and a Linux kernel running
netem, has anyone had luck with that?