I wanted to post my new shaping rules which I am running on my IPCOP
router. They seem to be working very well so far. Any comments to my
setup would be appreciated.
#!/bin/bash
# clear out the chain and setup a new chain
iptables -t mangle -D OUTPUT -o eth1 -j BW-OUT 2> /dev/null > /dev/null
iptables -t mangle -F BW-OUT 2> /dev/null > /dev/null
iptables -t mangle -X BW-OUT 2> /dev/null > /dev/null
iptables -t mangle -N BW-OUT
iptables -t mangle -I POSTROUTING -o eth1 -j BW-OUT
# mark packets: 2 is active ftp and passive ftp, 1 is ACK for downloads
and email and everything else
iptables -t mangle -A BW-OUT -p tcp -m length --length :64 -j MARK
--set-mark 1
iptables -t mangle -A BW-OUT -p tcp -m length --length :64 -j RETURN
iptables -t mangle -A BW-OUT -m tcp -p tcp --dport 25 -j MARK --set-mark 2
iptables -t mangle -A BW-OUT -m tcp -p tcp --dport 25 -j RETURN
iptables -t mangle -A BW-OUT -p tcp --sport 59999 -j MARK --set-mark 3
iptables -t mangle -A BW-OUT -p tcp --sport 59999 -j RETURN
iptables -t mangle -A BW-OUT -p tcp --sport 50000:51000 -j MARK --set-mark 3
iptables -t mangle -A BW-OUT -p tcp --sport 50000:51000 -j RETURN
# clear the qdisc
tc qdisc del dev eth1 root
#add the root qdisk
tc qdisc add dev eth1 root handle 1: htb default 10
#add main rate limit class and 2 leafs
tc class add dev eth1 parent 1: classid 1:1 htb rate 105kbps ceil 105kbps
tc class add dev eth1 parent 1:1 classid 1:10 htb rate 45kbps ceil
105kbps prio 0
tc class add dev eth1 parent 1:1 classid 1:11 htb rate 40kbps ceil
105kbps prio 1
tc class add dev eth1 parent 1:1 classid 1:12 htb rate 20kbps ceil
105kbps prio 2
#filter traffic into classes
tc filter add dev eth1 parent 1:0 prio 0 protocol ip handle 1 fw flowid
1:10
tc filter add dev eth1 parent 1:0 prio 1 protocol ip handle 2 fw flowid
1:11
tc filter add dev eth1 parent 1:0 prio 2 protocol ip handle 3 fw flowid
1:12
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