yea, i'd say not enough info...but...anyway, i got mine working real easy (i got help from the forums a long time ago xD)
although....im running a debian system...i dont know how far this will get you since you didnt say your distro..(unless i missed it..)
Code:
modprobe iptable_nat
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward
replace eth0 with the interface that goes to your internet!! hope that helps....when you reboot, you have to type this in again (assuming it works), so you'll have to ask someone how to make startup scripts...i'm still learnin linux too