Обмеження швидкості на Linux

Сьогодні потрібно було обмежети для одного працівника (192.168.0.2) швидкість до 512 Кб/с на вхід та вихід. Допоміг ось такий скрипт:

#!/bin/bash
#
#  tc uses the following units when passed as a parameter.
#  kbps: Kilobytes per second
#  mbps: Megabytes per second
#  kbit: Kilobits per second
#  mbit: Megabits per second
#  bps: Bytes per second
#       Amounts of data can be specified in:
#       kb or k: Kilobytes
#       mb or m: Megabytes
#       mbit: Megabits
#       kbit: Kilobits
#  To get the byte figure from bits, divide the number by 8 bit
#
TC=/sbin/tc
IF=eth1                 # Interface
DNLD=512kbps        # DOWNLOAD Limit
UPLD=512kbps        # UPLOAD Limit
IP=192.168.0.2      # Host IP
U32="$TC filter add dev $IF protocol ip parent 1:0 prio 1 u32"

start() {

    $TC qdisc add dev $IF root handle 1: htb default 30
    $TC class add dev $IF parent 1: classid 1:1 htb rate $DNLD
    $TC class add dev $IF parent 1: classid 1:2 htb rate $UPLD
    $U32 match ip dst $IP/32 flowid 1:1
    $U32 match ip src $IP/32 flowid 1:2

}

stop() {

    $TC qdisc del dev $IF root

}

restart() {

    stop
    sleep 1
    start

}

show() {

    $TC -s qdisc ls dev $IF

}

case "$1" in

  start)

    echo -n "Starting bandwidth shaping: "
    start
    echo "done"
    ;;

  stop)

    echo -n "Stopping bandwidth shaping: "
    stop
    echo "done"
    ;;

  restart)

    echo -n "Restarting bandwidth shaping: "
    restart
    echo "done"
    ;;

  show)

    echo "Bandwidth shaping status for $IF:\n"
    show
    echo ""
    ;;

  *)

    pwd=$(pwd)
    echo "Usage: $(/usr/bin/dirname $pwd)/tc.bash {start|stop|restart|show}"
    ;;

esac

exit 0

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