ipfw + dummynet X squid

ola povo =D
estou com problemas no limite de banda + squid
qdo eu boto no ipfw o fwd pra porta 80 o limite de banda não funciona
minhas regras abaixo

00004 divert 8668 ip from any to any via xl0
00005 allow ip from any to any via l0
00006 deny ip from any to 127.0.0.0/8
00007 deny ip from 127.0.0.0/8 to any
00010 allow ip from me to any
00011 allow ip from any to me
00020 deny ip from 172.10.0.0/16 to 172.10.0.0/16
00500 fwd 172.10.0.1,3128 tcp from 172.10.10.0/24 to any dst-port 80
01126 pipe 126 ip from any to 172.10.10.63 in
01127 pipe 127 ip from 172.10.10.63 to any out
33126 allow ip from any to 172.10.10.63
33127 allow ip from 172.10.10.63 to any
65535 deny ip from any to any

qdo eu apago a regra 00500 limita a banda tranquilo
alguem pode me ajudar please?
:(