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标题: Linux系统管理及桌面应用精华 35 [打印本页]

作者: 四保临江    时间: 2007-7-18 22:51
标题: Linux系统管理及桌面应用精华 35
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




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