Hi, all. Recently on the POSIX mailing list, there's a discussion on the correct way to bind to (or listen on) an ephemeral port. While I referenced the "UNIX Network Programming", we're not quite satisfied because even though it's co-written by someone involved in IETF, it's still JUST a textbook. The canonical way to do this, according to some (from stackoverflow.com, and other places), is to bind to port 0, which I assume had been reserved for this purpose, but I haven't find anything to back this up yet. On the POSIX list, they suggested that IETF should, (or should have already) state(d) that port 0 be reserved for binding to ephemeral ports. So can we find any reference for this? Or should we draft an RFC? Thanks.