iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j REDIRECT --to-port 3126
iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 443 -j REDIRECT --to-port 3127

iptables -t mangle -A PREROUTING -i eth1 -p tcp --dport 80 -j TPROXY --on-ip 0.0.0.0 --on-port 3126 --tproxy-mark 0x1/0x1
iptables -t mangle -A PREROUTING -i eth1 -p tcp --dport 443 -j TPROXY --on-ip 0.0.0.0 --on-port 3127 --tproxy-mark 0x1/0x1

# this is supposed to mark wan traffic going back to lan?
iptables -t mangle -A PREROUTING -i eth2 -p tcp -d 192.168.1.0/24 -j MARK --set-mark 0x1/0x1
iptables -t mangle -A PREROUTING -i eth3 -p tcp -d 192.168.1.0/24 -j MARK --set-mark 0x1/0x1

ip rule add fwmark 0x1/0x1 table 100
ip route add local 0.0.0.0/0 dev lo table 100