Users not able to surf while connected to the VPN (Route question)

[M Maas <mark@menem.mine.nu>]

Hi All,

I've got poptop on my debian server so my users van login from 
home into the network.

Currently I had to add some routers so they could go further 
on the network.

My network is: 192.168.8.
Other networks they needed to view are: 10.1.0. and 192.168.3.

Like this:

up route add -net 192.168.3.0/24 gw 192.168.8.4
up route add -net 10.1.0.0/24 gw 192.168.8.4

It's working perfectly without problems, but while my users 
are logged in from home, (with cable dsl, modem or whatever) 
they cannot surf the internet. I would like to add this 
capability to this already perfect setup.

What kind of route or action should I take so there browsing 
still works?

Thanks in advance,
Mark