vnc pcanywhere in e-smith

Greetings!
I would appreciate receiving your guidance on how to configure my
e-smith server to permit any of its win98 clients access a pcanywhere
host outside the network. The win98 clients already has internet
access trought the e-smith server but neither vnc client or pc
anywhere remote could go outside to the internet. The servers has 2
network cards, 1 to the network (eth0) and the other for the cable
modem of my ISP (eth1)
thanks!