Hi, Slightly offtopic but this list is probably the most likely to have people who know the answer... I've got a requirement to filter traffic for a given SERIAL DEVICE connected via slip.. Now as people may or may not know slattach creates sl# interfaces in the order slattach was called... on our system there is no certainty that sl0 will always be /dev/ttyM3 for instance. Is there anyway to identify from anywhere (inc the /proc and /sys/class/net fs) which sl# maps to which /dev/ttyM# number? Thanks, Richard. -- Richard Horton Users are like a virus: Each causing a thousand tiny crises until the host finally dies. http://www.solstans.co.uk - Solstans Japanese Bobtails and Norwegian Forest Cats http://www.pbase.com/arimus - My online photogallery -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html