Sereciya :: Prioritizing empty TCP ACKs... OpenBSD pf -> FreeBSD ipfw Translation

[Sereciya Kurdistani]

Hello,

  I'm trying to translate the following code designed to set Prioritizing
  for empty TCP ACKs (taken from:  http://www.benzedrine.cx/ackpri.html):

  Suggestions, recommendations & corrections gladly accepted; send em over!

  OpenBSD pf:
  ^^^^^^^^^^
  ext_if="kue0"

  altq on $ext_if priq bandwidth 100Kb queue { q_pri, q_def }
  queue q_pri priority 7
  queue q_def priority 1 priq(default)

  pass out on $ext_if proto tcp from $ext_if to any flags S/SA \
        keep state queue (q_def, q_pri)

  pass in  on $ext_if proto tcp from any to $ext_if flags S/SA \
        keep state queue (q_def, q_pri)


  FreeBSD ipfw:
  ^^^^^^^^^^^^^
  oif_1="tun0"

  ipfw pipe  1 config bw 100Kbyte/s noerror 
  ipfw queue 1 config weight 1 pipe 1
  ipfw queue 2 config weight 7 pipe 1

  ipfw add NNNN check-state
  ipfw add NNNN queue 1 tcp from any to any out via ${oif_1} keep-state iptos lowdelay tcpflags ack  ## ??? tcpack ack ??? 

  ipfw add NNNN queue 1 tcp from any to any in  via ${oif_1} tcpflags ack


  Is this correct?

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