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If the rp_filter == 2 works for you, cool beans. "0" means no filtering, "1" means strict filtering (default), and "2" means "loose" filtering. The 4.x kernel interprets these differently than 3.x, such that to get absolutely no filtering, you have to articulate both the "all", and each NIC for which you do not want filtering. If "loose" is working, then good to go on that angle. On VM machines, my experience has shown that the noaaport instance NIC has to be given a bridging configuration . . . i.e., it has to be a "straight through" pass of the traffic for the device that is connected to the Novra. I assume that was already the case with the RH7 VM, but maybe the loading of the RH8 scrubbed that? Stonie Ticket Details =================== Ticket ID: MJB-944803 Department: Support NOAAPORT Priority: Normal Status: Open =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.