gypsy wrote:
nix4me wrote:
24.xxx.xxx.xxx
|router|
192.168.1.1
|switch|
192.168.1.100 & 192.168.1.101
So can we assume that 192.168.1.1 has 2 NICs, eth0 facing 24.x.x.x/32
and eth1 facing 192.168.1.0/24?
Yes. Although I am not running the script on this box. Its a plain
Ipcop linux firewall.
I am running proftpd on (192.168.1.101) with the port set to 65437 and
with passive ports set to 50000-51000. Proftpd allows you to specify a
range of ports to use on passive transfers. I need to be able to limit
my outbound ftp traffic to 40 Kbytes per second.
The only way I can see to do this is limit by marking packets with
iptables. I am marking traffic on 65436 which is the active ftp data
port (65437-1) and 50000-60000. Outbound shaping is working
fine....however....inbound ftp traffic is also being shaped to 40K. I
have no idea why.
Seems to me the below rules should mark outbound packets and shape only
outbound packets. I dont understand why inbound packets are getting shaped.
Here is the script:
#!/bin/bash
#shaping passive and active outbound ftp traffic on an internal computer
without affecting inbound and lan speed
# mark the outbound passive ftp packets on ports 50000-51000
iptables -t mangle -N MYSHAPER-OUT
iptables -t mangle -I OUTPUT -o eth0 -j MYSHAPER-OUT
iptables -t mangle -A MYSHAPER-OUT -p tcp --sport 65436 -j MARK
--set-mark 20
iptables -t mangle -A MYSHAPER-OUT -p tcp --sport 50000:51000 -j MARK
--set-mark 20
iptables -t mangle -A MYSHAPER-OUT -m mark --mark 0 -j MARK --set-mark 26
1) Are you sure these rules are correctly marking and that the marks
exist at the time the tc filter sees the packet? My hunch is NOT.
ASIDE: We _really_ need a way for filters to report hit counts!
No, I am not sure. I have used the command 'watch -n1 tc -s class ls
dev eth0' to see the packets flying but i dont really know how to make
sure they are being marked correctly. I must assume that ALL packets on
ports 65436 and 50000-510000 are being marked because they are being
shaped. Just not sure why incoming packets are being markek and
shaped. Outbound shaping is working just fine.
2) Since 1:26 is htb default, why is it necessary to '--set-mark 26'?
I thought it was necessary.
gypsy
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