ALTQ - A Basic HFSC Traffic Shaper

altq on $ext_if bandwidth $ext_bw hfsc queue { main, spamd }
       queue main bandwidth 99% priority 7 qlimit 100 hfsc (realtime 20%, linkshare 99%) \
		{ q_pri, q_def, q_web, q_dns }
          queue q_pri bandwidth 3% priority 7 hfsc (realtime 0, linkshare 3% red )
          queue q_def bandwidth 47% priority 1 hfsc (default realtime 30% linkshare 47% red)
          queue q_web bandwidth 47% priority 1 hfsc (realtime 30% linkshare 47% red)
          queue q_dns bandwidth 3% priority 7 qlimit 100 hfsc (realtime (30Kb 3000 12Kb), linkshare 3%)
       queue spamd bandwidth 0% priority 0 qlimit 300 hfsc (realtime 0, upperlimit 1%, linkshare 1%)

match out on $ext_if from $air_if:network nat-to ($ext_if) queue (q_def, q_pri)
match out on $ext_if from $int_if:network nat-to ($ext_if) queue (q_def, q_pri)
match out on $ext_if proto tcp to port { www https } queue (q_web, q_pri)
match out on $ext_if proto { tcp udp } to port domain queue (q_dns, q_pri)
match out on $ext_if proto icmp queue (q_dns, q_pri)