On Thu, 22 Dec 2011 18:36:52 +0100, you wrote: Speaking of Multinet and DECnet-over-IP. I just got this crazy idea to implement DECnet-over-IP tunneling in RSX, and it would be fun to be compatible. Have anyone analyzed, or read any documentation on how the tunneling is done? TCP or UDP? Any additional headers or data in the stream in addition to the encapsulated DECnet packets? IIRC, you can find a daemon to interface with Multinet tunnels into the Linux DECnet tools package. That should be a good starting point where to discover what would be needed to write a new RSX interface, at least in terms of packet structures and such. :) HTH, G.