[LARTC] Help with bandwith control in a firewall/bridge machine
Miguel Ángel Domínguez Durán
mdominguez@cherrytel.com
Tue Feb 15 10:11:29 CET 2005
Hello again,
First, excuse me for my poor english.
I'm trying now to make bandwith control in a firewall machine running
Shorewall. This machine is also a bridge using bridge-utils
bridge-utils-devel. It is a mandrake 10. The configuration is something like
this:
FTP/Webserver ------| eth0 eth1
Mailserver -------------|------BRIDGE/FIREWALL------Router-----Internet
DB App. server -------|
I have installed iptoute2 and all kernel options needed. I have stated
TC_ENABLED = Yes and copied my own script in the tcstart file so shorewall
should run it when it gets restarted. I don't get any errors when the script
is executed, but all the packets go through the default queue in uplink and
downlink when i analize the queues using .
I use the following script to start the bridge:
#!/bin/sh
set -x
#Activamos el puente:
brctl addbr br0
#Desactivamos el protocolo de spanning tree, posibles loops entre routers,
#como en nuestro caso solo lo vamos a conectar a un router no hace falta:
brctl stp br0 off
#A continuación añadimos las tarjetas de red al puente: (Ojo, una vez hecho
#esto perdemos la conectividad)
brctl addif br0 eth0
brctl addif br0 eth1
#Desactivamos las 2 tarjetas de red:
correo.cherrytel.comifconfig eth0 down
ifconfig eth1 down
#Las volvemos a activar pero sin IP definida
ifconfig eth0 0.0.0.0 up
ifconfig eth1 0.0.0.0 up
#Activamos el puente y le asignamos una IP:
ifconfig br0 213.9.139.6 up
#Añadimos la ruta por defecto:
route add default gw 213.9.139.1
#Activamos el reenvio:
echo "1" > /proc/sys/net/ipv4/ip_forward
y añado la entrada al /etc/rc.local
The script in tcstart is:
#!/bin/bash
#
#
DEV1=eth0 #salida a red interna de Cherrytel
DEV0=eth1 #salida a internet
# Note that this is significantly lower than the capacity of
1500.
# Because of this, you may not want to bother limiting inbound
traffic
# until a better implementation such as TCP window
manipulation can be used.
#
# End Configuration Options
#
TC=/sbin/tc
if [ "$1" = "status" ]
then
echo "Enlace descendente"
echo "[qdisc]"
$TC -s qdisc show dev $DEV1
echo "[class]"
$TC -s class show dev $DEV1
echo "[filter]"
$TC -s filter show dev $DEV1
echo "Enlace ascendente"
echo "[qdisc]"
$TC -s qdisc show dev $DEV0
echo "[class]"
$TC -s class show dev $DEV0
echo "[filter]"
$TC -s filter show dev $DEV0
exit
fi
# Reset everything to a known state (cleared)
$TC qdisc del dev $DEV0 root 2> /dev/null > /dev/null
$TC qdisc del dev $DEV1 root 2> /dev/null > /dev/null
iptables -t mangle -D POSTROUTING -o $DEV1 -j MYSHAPER-IN 2> /dev/null >
/dev/null
iptables -t mangle -F MYSHAPER-OUT 2> /dev/null > /dev/null
iptables -t mangle -X MYSHAPER-OUT 2> /dev/null > /dev/null
iptables -t mangle -D PREROUTING -i $DEV0 -j MYSHAPER-OUT 2> /dev/null >
/dev/null
iptables -t mangle -F MYSHAPER-IN 2> /dev/null > /dev/null
iptables -t mangle -X MYSHAPER-IN 2> /dev/null > /dev/null
if [ "$1" = "stop" ]
then
echo "Shaping removed on $DEV1."
echo "Shaping removed on $DEV0."
exit
fi
###########################################################
#
# Inbound Shaping (limits total bandwidth to 850Kbps)
# Este es el enlace descendente, desde internet hacia la red interna de
Cherrytel
# set queue size to give latency of about 2 seconds on low-prio packets
#ip link set dev $DEV1 qlen 30
# changes mtu on the outbound device. Lowering the mtu will result
# in lower latency but will also cause slightly lower throughput due
# to IP and TCP protocol overhead.
#ip link set dev $DEV1 mtu 1000
# add HTB root qdisc
$TC qdisc add dev $DEV1 root handle 1: htb default 37
# add main rate limit classes
$TC class add dev $DEV1 parent 1: classid 1:1 htb rate 856kbit
# add leaf classes - We grant each class at LEAST it's "fair share" of
bandwidth.
# this way no class will ever be starved by another
class. Each
# class is also permitted to consume all of the available
bandwidth
# if no other classes are in use.
$TC class add dev $DEV1 parent 1:1 classid 1:20 htb rate 64kbit ceil 856kbit
$TC class add dev $DEV1 parent 1:1 classid 1:21 htb rate 64kbit ceil 856kbit
$TC class add dev $DEV1 parent 1:1 classid 1:22 htb rate 64kbit ceil 856kbit
$TC class add dev $DEV1 parent 1:1 classid 1:37 htb rate 600kbit ceil
856kbit #por defecto
$TC class add dev $DEV1 parent 1:1 classid 1:23 htb rate 64kbit ceil 856kbit
#oficinas
# attach qdisc to leaf classes - here we at SFQ to each priority class. SFQ
insures that
# within each class connections will be
treated (almost) fairly.
$TC qdisc add dev $DEV1 parent 1:20 handle 20: sfq perturb 10
$TC qdisc add dev $DEV1 parent 1:21 handle 21: sfq perturb 10
$TC qdisc add dev $DEV1 parent 1:22 handle 22: sfq perturb 10
$TC qdisc add dev $DEV1 parent 1:37 handle 37: sfq perturb 10
$TC qdisc add dev $DEV1 parent 1:23 handle 23: sfq perturb 10
# filter traffic into classes by fwmark - here we direct traffic into
priority class according to
# the fwmark set on the packet (we
set fwmark with iptables
# later). Note that above we've set
the default priority
# class to 1:37 so unmarked packets
(or packets marked with
# unfamiliar IDs) will be defaulted
to the lowest priority
# class.
$TC filter add dev $DEV1 parent 1:0 prio 0 protocol ip handle 20 fw flowid
1:20
$TC filter add dev $DEV1 parent 1:0 prio 0 protocol ip handle 21 fw flowid
1:21
$TC filter add dev $DEV1 parent 1:0 prio 0 protocol ip handle 22 fw flowid
1:22
$TC filter add dev $DEV1 parent 1:0 prio 0 protocol ip handle 23 fw flowid
1:23
# Marking the packets.
iptables -t mangle -N MYSHAPER-IN
iptables -t mangle -I POSTROUTING -o $DEV1 -j MYSHAPER-IN
iptables -A MYSHAPER-IN -d 213.9.139.30 -t mangle -j MARK --set-mark 20
iptables -A MYSHAPER-IN -d 213.9.139.31 -t mangle -j MARK --set-mark 20
iptables -A MYSHAPER-IN -d 213.9.139.32 -t mangle -j MARK --set-mark 20
iptables -A MYSHAPER-IN -d 213.9.139.22 -t mangle -j MARK --set-mark 21
iptables -A MYSHAPER-IN -d 213.9.139.71 -t mangle -j MARK --set-mark 21
iptables -A MYSHAPER-IN -d 213.9.139.25 -t mangle -j MARK --set-mark 22
iptables -A MYSHAPER-IN -d 213.9.139.24 -t mangle -j MARK --set-mark 23
# iptables -A MYSHAPER-IN -d 10.9.139.14 -t mangle -j MARK --set-mark 22
# iptables -A MYSHAPER-IN -d 10.9.139.13 -t mangle -j MARK --set-mark 22
#El resto de tráco irÃal flujo por defecto, el 2:37.
# Done with inbound shaping
#
####################################################
echo "Control del enlace descendente activado."
#Si solo se desea controlar el enlace descendente, quitar el comentario de
la siguiente instruccion exit
#exit
###########################################################
#
# Outbound Shaping (limits total bandwidth to 856Kbps)
# Este es el enlace ascendente, desde la red interna de Cherrytel a internet
# set queue size to give latency of about 2 seconds on low-prio packets
#ip link set dev $DEV0 qlen 30
# changes mtu on the outbound device. Lowering the mtu will result
# in lower latency but will also cause slightly lower throughput due
# to IP and TCP protocol overhead.
#ip link set dev $DEV0 mtu 1000
# add HTB root qdisc
$TC qdisc add dev $DEV0 root handle 2: htb default 87
# add main rate limit classes
$TC class add dev $DEV0 parent 2: classid 2:1 htb rate 856kbit
# add leaf classes - We grant each class at LEAST it's "fair share" of
bandwidth.
# this way no class will ever be starved by another
class. Each
# class is also permitted to consume all of the available
bandwidth
# if no other classes are in use.
$TC class add dev $DEV0 parent 2:1 classid 2:70 htb rate 64kbit ceil 856kbit
$TC class add dev $DEV0 parent 2:1 classid 2:71 htb rate 64kbit ceil 856kbit
$TC class add dev $DEV0 parent 2:1 classid 2:72 htb rate 64kbit ceil 856kbit
$TC class add dev $DEV0 parent 2:1 classid 2:87 htb rate 600kbit ceil
856kbit #por defecto
$TC class add dev $DEV0 parent 2:1 classid 2:73 htb rate 64kbit ceil 856kbit
#prueba
# attach qdisc to leaf classes - here we at SFQ to each priority class. SFQ
insures that
# within each class connections will be
treated (almost) fairly.
$TC qdisc add dev $DEV0 parent 2:70 handle 70: sfq perturb 10
$TC qdisc add dev $DEV0 parent 2:71 handle 71: sfq perturb 10
$TC qdisc add dev $DEV0 parent 2:72 handle 72: sfq perturb 10
$TC qdisc add dev $DEV0 parent 2:87 handle 87: sfq perturb 10
$TC qdisc add dev $DEV0 parent 2:73 handle 73: sfq perturb 10
# filter traffic into classes by fwmark - here we direct traffic into
priority class according to
# the fwmark set on the packet (we
set fwmark with iptables
# later). Note that above we've set
the default priority
# class to 1:87 so unmarked packets
(or packets marked with
# unfamiliar IDs) will be defaulted
to the lowest priority
# class.
$TC filter add dev $DEV0 parent 2:0 prio 0 protocol ip handle 70 fw flowid
2:70
$TC filter add dev $DEV0 parent 2:0 prio 0 protocol ip handle 71 fw flowid
2:71
$TC filter add dev $DEV0 parent 2:0 prio 0 protocol ip handle 72 fw flowid
2:72
$TC filter add dev $DEV0 parent 2:0 prio 0 protocol ip handle 73 fw flowid
2:73
# Marking the packets.
iptables -t mangle -N MYSHAPER-OUT
iptables -t mangle -I PREROUTING -i $DEV0 -j MYSHAPER-OUT
iptables -A MYSHAPER-OUT -s 213.9.139.30 -t mangle -j MARK --set-mark 70
iptables -A MYSHAPER-OUT -s 213.9.139.31 -t mangle -j MARK --set-mark 70
iptables -A MYSHAPER-OUT -s 213.9.139.32 -t mangle -j MARK --set-mark 70
iptables -A MYSHAPER-OUT -s 213.9.139.22 -t mangle -j MARK --set-mark 71
iptables -A MYSHAPER-OUT -s 213.9.139.71 -t mangle -j MARK --set-mark 71
iptables -A MYSHAPER-OUT -s 213.9.139.25 -t mangle -j MARK --set-mark 72
iptables -A MYSHAPER-OUT -s 213.9.139.24 -t mangle -j MARK --set-mark 73
# iptables -A MYSHAPER-OUT -s 10.9.139.13 -t mangle -j MARK --set-mark 72
# iptables -A MYSHAPER-OUT -s 10.9.139.14 -t mangle -j MARK --set-mark 72
#El resto de tráco irÃal flujo por defecto, el 2:87.
# Done with outbound shaping
#
####################################################
echo "Control del enlace ascendente activado."
exit
Thank you very much
UN CORDIAL SALUDO
Miguel Ángel Domínguez Durán.
Departamento Técnico.
Cherrytel Comunicaciones, S.L.
mdominguez@cherrytel.com
http://www.cherrytel.com/
Tlf. 902 115 673
Fax 952218170
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