I am working on a tool using udpcast that works kinda like ssh .. but allows one to 'cast' to multiple hosts. I cheat and use 7zip to do the data reduction. THis uses Windows XP and/or 7 .. and you have to have something on the windows side to tell it to start listening... For now you can run this on the receivers: udp-receiver.exe --nokbd | 7z x -si -ttar -y -a{targetdir} and then this on the sender 7za a -ttar -so foo /sourcedir -r | udp-sender --full-duplex and that will handle the work for you. Works well and is well tested. - b PS > you have to use -ttar because 7z doesn't appear well supported for streaming .. particularly between different OS's On Feb 2, 2011, at 2:38 PM, Dominic Massé wrote: - b Branson Matheson Experiment Specialist NASA Langley Research Center Airspace & Traffic Operations Simulation Project LaRC Information Technology Enhanced Services (LITES) Stinger Ghaffarian Technologies 130 Research Drive, Hampton, VA 23666 (757) 864-9054 (Office) edward.b.matheson(a)nasa.gov