IPB=/sbin/iptables
$IPB -F INPUT

for kk in ` cat ip.txt | awk '{printf ("%s_%s\n",$1,$2)}'`
do
#echo $kk
startip=`echo $kk | awk -F "_" '{print $1}'`
endip=`echo $kk | awk -F "_" '{print $2}'`
$IPB -A INPUT -p tcp --dport 80 -m iprange --src-range $startip-$endip -j ACCEPT
done
### deny all 
$IPB -A INPUT -p tcp --dport 80 -j DROP

ip.txt内容是

1.0.1.0 1.0.3.255 768
1.0.8.0 1.0.15.255 2,048
1.0.32.0 1.0.63.255 8,192