vmware, routing

I have to set up a firewall and I don't have net. The only way to test it is
vmware on windows xp with modem connection. The configuration of virtual net
is:



xp1:

- ethernet adapter: VMnet2,

- ip: 10.0.0.3 / 24

- brama: 10.0.0.1



linux (mandrake 9.0):

- eth0: VMnet8 (nat), ip: 192.168.92.133 / 24

- eht1: VMnet2, ip: 10.0.0.1 / 24

- routting table:

10.0.0.0 * 255.255.255.0 U 0 0
0 eth1

192.168.92.0 * 255.255.255.0 U 0 0 0
eth0

default 192.168.92.2 * 0.0.0.0 UG 0 0 0
eht0



xp2:

- ethernet adapter: VMnet8 (nat), ip: 192.168.131 / 24



The main problem: I cannot access the internet from xp1 (from xp2 I can, but
datagrams pass over the router).

If I sent a ping, it will go but not return. If I sent to xp2, it will
return, so linux works well. I have been trying to deal with it for all day,
so please tell me as easy as possible what I should do.