IPFW reset dead???

[Info [swebase]]

This in the kernel before

option          TCP_RESTRICT_RST

$cmd 00640 reset log tcp from any to me 135  in via $oif limit src-addr 4

would reset closed ports so a scanner not would see it open (filtered).
How do i close a port so no portscanner sees it in freebsd 4.8 ??

/K.K