关于Linux系统服务器站点流量限制的方案

　　#! /bin/sh

　　# Simple bandwidth limiter - <[email]j@4u.net[/email]>

　　# Change this to your link bandwidth

　　# (for cable modem, DSL links, etc. put the maximal bandwidth you can

　　# get, not the speed of a local Ethernet link)

　　REAL_BW='10Mbit'

　　# Change this to the bandwidth you want to allocate to WEB.

　　# We're talking about megabits, not megabytes, so 80Kbit is

　　# 10 Kilobytes/s

　　WEB_BW='1000Kbit'

　　# Change this to your physical network device (or 'ppp0')

　　NIC='eth0'

　　tc qdisc del dev "$NIC" root 2> /dev/null

　　tc qdisc add dev "$NIC" root handle 1: cbq

　　bandwidth "$REAL_BW" avpkt 1000

　　tc class add dev "$NIC" parent 1: classid 1:1 cbq bandwidth "$REAL_BW"

　　rate "$REAL_BW" maxburst 1 avpkt 1000

　　tc class add dev "$NIC" parent 1:1 classid 1:10 cbq

　　bandwidth "$REAL_BW" rate "$WEB_BW" maxburst 1 avpkt 1000 bounded

　　tc qdisc add dev "$NIC" parent 1:10 sfq perturb 10

　　tc filter add dev "$NIC" parent 1: protocol ip handle 1 fw classid 1:10

　　iptables -t mangle -A OUTPUT -p tcp --sport 80 -j MARK --set-mark 1