Public IP without using NAT (ebtables)

Hi, 

I am trying to do the following:-

(1) eth0 ------------------ eth0 (2) eth1-------------------  eth0 (3)


(1) Windows XP 
eth0 192.168.250.96
netmask 255.255.255.0
default gateway 192.168.250.254


(2) Linux (with ebtables)

brctl addbr br0
brctl addif br0 eth0
brctl addif br0 eth1

ifconfig br0 0.0.0.0 up

ifconfig eth0 192.168.18.11 netmask 255.255.255.0 up
ifconfig eth1 192.168.250.57 netmask 255.255.255.0 up

ebtables -t broute -A BROUTING -p ipv4 -i eth0 --ip-dst 192.168.18.11 -j ACCEPT
ebtables -t broute -A BROUTING -p ipv4 -i eth1 --ip-dst 192.168.250.57 -j ACCEPT

ebtables -t broute -A BROUTING -p arp -i eth0 -d $MAC_OF_ETH0 -j ACCEPT
ebtables -t broute -A BROUTING -p arp -i eth1 -d $MAC_OF_ETH1 -j ACCEPT


(3) Linux Gateway
ifconfig eth1 192.168.250.254 netmask 255.255.255.0 up


I want to ping 192.168.18.18 from 192.168.250.96, how can I do this?
Can ebtables help me? Please advice, hope to hear from you all soon :)

Warm regards, 

Calvin Kaiwen