Ok, i think i found the problem. The script below seems to be working.
I need to do some testing now.
Thanks for all the help in here. If anyone has any enhancements, feel
free to comment please.
#!/bin/bash
#shaping passive ftp traffic
# mark the outbound passive ftp packets on ports 50000-51000
iptables -t mangle -D POSTROUTING -o eth0 -j MYSHAPER-OUT 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 -N MYSHAPER-OUT
iptables -t mangle -I POSTROUTING -o eth0 -j MYSHAPER-OUT
iptables -t mangle -A MYSHAPER-OUT -p tcp --sport 50000:51000 -j MARK
--set-mark 20
iptables -t mangle -A MYSHAPER-OUT -p tcp --dport 50000:51000 -j MARK
--set-mark 20
iptables -t mangle -A MYSHAPER-OUT -m mark --mark 0 -j MARK --set-mark 26
# clear it
tc qdisc del dev eth0 root
#add the root qdisk
tc qdisc add dev eth0 root handle 1: htb default 26
#add main rate limit class
tc class add dev eth0 parent 1: classid 1:1 htb rate 100mbps
#add leaf classes
tc class add dev eth0 parent 1:1 classid 1:26 htb rate 100mbps
tc class add dev eth0 parent 1:1 classid 1:20 htb rate 38kbps
#filter traffic into classes
tc filter add dev eth0 parent 1:0 prio 0 protocol ip handle 20 fw
flowid 1:20
tc filter add dev eth0 parent 1:0 prio 0 protocol ip handle 26 fw
flowid 1:26
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