[LARTC] General Traffic Control Question

[Cal Spadoni <cspadoni@cornerturn.com>]

Here's my situation:

I've got an Intel machine running a 2.6.9 linux kernel and this box has 
4 modems attached to it via a usb to serial port expander. In order to 
force data down each of the modems, some pretty simple rules are used 
and they are as follows:

iptables -t mangle -A OUTPUT -p tcp --dport $PORT1  -j MARK --set-mark 1
iptables -t mangle -A OUTPUT -p tcp --dport $PORT2  -j MARK --set-mark 2
iptables -t mangle -A OUTPUT -p tcp --dport $PORT3  -j MARK --set-mark 3
iptables -t mangle -A OUTPUT -p tcp --dport $PORT4  -j MARK --set-mark 4

ip rule add fwmark 1 table isp1
ip rule add fwmark 2 table isp2
ip rule add fwmark 3 table isp3
ip rule add fwmark 4 table isp4

ip route add default via $GWIPADDR dev ppp0 table isp1
ip route add default via $GWIPADDR dev ppp1 table isp2
ip route add default via $GWIPADDR dev ppp2 table isp3
ip route add default via $GWIPADDR dev ppp3 table isp4

$PORT1 thru $PORT4 are unique and $GWIPADDR is the same for all 4 ppp links.

Using these rules, data going out of my Intel box is shaped nicely based 
on looking at the transmit  columns in /proc/net/dev.

On the receive side, all of the traffic is coming down the only kernel 
default route, which is ppp0, and this is the problem.

Is there a way to use iptables to force answers for data going out a 
given ppp link to be returned using the same link?

Thanks in advance for your help!!

- Cal

cspadoni@cornerturn.com



_______________________________________________
LARTC mailing list
LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc