In my pppd options file I used to use the option
active-filters 'outbound'
which forces the idle time counter to only be reset by outbound packages. A
great option to stop your dial on demand connection being kept open by
miscellaneous junk hitting your IP address. However it doesn't work in the
latest releases (works in Mandrake 9.1 but not in 10.1). Googling around it
appears the directional statements 'outbound' and 'inbound' have been taken
out of the linux code due to some problems. I can still use other active
filter statements has outlined in tcpdump. My understanding of these things
is not great... can someone give me an idea of how to put together an
active-filter statement that would only count outgoimg packages? I have seen
one suggestion of:
active-filters 'not ip multicast'
Is this good enough to ignore all junk from outside?
Kevin.
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