Linux中最简单的总带宽限制

最简单的总带宽限制(tc脚本,每个主流linux都有tc和iptable,cp到一个文件赋予x权限,执行就ok)....根据pureftp的faq中带宽限制得来的...

　　#! /bin/sh

　　# Simple bandwidth limiter -

　　# 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 FTP.

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

　　# 10 Kilobytes/s

　　FTP_BW='7200Kbit' //总带宽

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

　　NIC='eth0'

　　# Change this to the ports you assigned for passive FTP

　　FTP_PORT_LOW="10000" //passive端口低限

　　FTP_PORT_HIGH="11000" //passive端口上限

　　tc qdisc del dev "$NIC" root 2> /dev/null //清除tc队列中关于网卡的设置

　　//(hunreal修改)

　　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 5 avpkt 1000

　　tc class add dev "$NIC" parent 1:1 classid 1:10 cbq bandwidth "$REAL_BW" rate "$FTP_BW" maxburst 5 avpkt 1000 bounded

　　tc qdisc add dev "$NIC" parent 1:10 sfq quantum 1514b

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

　　iptables -t mangle -A OUTPUT -p tcp --sport 20:1221 -j MARK --set-mark 1

　　//上面的1221是ftp的端口号

　　iptables -t mangle -A OUTPUT -p tcp --sport "$FTP_PORT_LOW":"$FTP_PORT_HIGH" -j MARK --set-mark 1