[LARTC] routing decisions

[Payal Rathod]

Hi,
I have Mandrake 10.0 gateway with internet via. ppp0. Also, another
machine 192.168.0.4 is always connected to net via. a dial-up
modem. Now I want to allow a machine (192.168.0.2) in my LAN to
access net through 192.168.0.4. So according to lartc howto I did,
# echo 200 John >> /etc/iproute2/rt_tables
# ip rule add from 192.168.0.2 table John
# ip route add default via 192.168.0.4 dev eth0 table John
# ip route flush cache

But still 192.168.0.2 cannot access internet. tracert shows that
the traffic is coming to my Linux gateway and then going nowhere.
I have not changed anything in 192.168.0.2

What steps am I missing?

Waiting eagerly for any help on this.
With warm regards,
-Payal