fw ctl debug 0
fw ctl debug -buf 10000
fw ctl debug -m drop conn packet
fwaccel dbg -m general all 
fw ctl kdebug -f >& fwconnchain.elg

[Ctrl]+[C] to stop the debug

fw ctl debug 0

fw ctl debug 0
fw ctl debug -buf 8192
fw ctl debug + conn link drop
fw ctl kdebug -f >& fwconnchain.elg
fw ctl debug 0