Read through http://www.benzedrine.cx/ackpri.html which makes perfect
sense (for the most part). What I'm getting hung up on is the use of the
TCP flags in the filtering:
pass out on $ext_if proto tcp from $ext_if to any flags S/SA \
keep state queue (q_def, q_pri)
>From what the pf.conf(5) man page says, "flags S/SA" will never match an
ACK. If that's the case, then packets will only be assigned to queue
q_pri when they have a TOS of lowdelay, since those and empty ACKs are the
only things assigned to the second queue.
Both this page and the FAQ examples indicate that the above rule will
assign ACKs to the higher priority queue, but I can't see how.
Would someone please enlighten me?
Thanks.
Brad Waite
