fwmarks

[Esteban <eribicic@sinectis.com>]

i ve got the clasic firewall for my internal network but inteades of one
internet gw ive got two.

(internel 172.0.0.0/24) eth0 -#linux box#-eth2 (first gw to internet)
					#-ppp0 (second gw to internet)

i have a trnasparent squid and a nat rule to redirect ports..
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT
--to-port 3128

then squid looks for the webpages on the two gateways (multipath).
now i would like to fwmark paquets generated by squid and thru a
routeing table route only www packages to the gw i want.

i tryed 
iptables -t mangle -A PREROUTING -p tcp --dport 80 -j MARK --set-mark 2

and then 
echo 201 www.out >> /etc/iproute2/rt_tables
ip rule add fwmark 2 table www.out
ip route add default gw via 1.1.1.1 dev ppp0 
ip route flush cache

and does not work!.
if i create a rule like 
ip rule add to 2.2.2.2 table www.out
ip route flush cache

that does work!..
i think the mangling is not okay..how do i mangle paquetes generated by
my own server? if anyone have some experience please help me!

thanks in advance