Public & Private networks on the same wire?

[hindsite]

I wish to share my cable modem connection over 802.11, however I wish to keep a portion of the network "private".

I have 1 DHCP address from the cable company, a Linksys WRV54G (Wireless-G VPN Broadband Router), and an older D-Link 802.11b router.

What is the best way to do this? I¡¦m not against adding or changing HW, but if I can use the existing stuff it would be best ƒº

The thought was to connect the Linksys to the cable modem & use it for the "private" side, and then take that and feed it to the Dlink for the public side.

The Linksys would have the default (192.168.1.x), and the Dlink would be changed to dispense 10.x.x.x addresses.

Questions:
1) Will d-link traffic be able to route through 2 levels of NAT to reach the open internet? Will things like VPN be able to get through?
2) As both the 10. and 192.168. are considered non-routable, am I really isolating the 2 networks, or am I just fooling myself?

[cszeto]

http://forums.practicallynetworked.com/showthread.php?threadid=2770

[hindsite]

Thx - You've confirmed that the 2nd router can get "out" - I've just tried it and it works.

However, all the private network stuff is visible from the public network!

(Cable modem) => (Linksys-g) - private net (192.168.1.x) ==> (Dlink -b)---public net 10.20.30.x)

With an assigned address of 10.20.30.100,
- I typed ping 192.168.1.1 (the linksys router), and it worked
- I typed ping 192.168.1.101 and the reponse was:
192.168.1.101 [machine_name.linksys]
- Start | File | run "machine_name.linksys" and it showed the shared printer :(

So what is the correct routing to segregate the public from the private??

Thanks!

[cszeto]

Flip the order of how your network is laid out.