Not possible. 802.11 wireless is bridging by definition. No routing, IP addresses, or services (such as IPSec) involved. There's no other way to connect between wireless and wired devices other than bridging.
Now, you could isolate the wired and wireless part with a router, VPN, or filters, but that requires layer 3 services in addition to bridging.
Overkill. You have WPA encryption for the wireless. On top of that, you want to add VPN encryption. You don't really need both. WPA is enough.
The bigger they are, the harder they crash. How about this alternative? Use an access point, not a wireless router for the wireless part of the puzzle. Use WPA encryption. Use a seperate IPSec VPN router to terminate the tunnel. Netgear seems to have a good selection: |
There are products that sorta do what you want: |
Yes. The WRT54G can handle alternative firmware with VPN termination features. Sveasoft Alchemy includes PPTP VPN services which is handy for Windoze clients as it comes with the operating system. IPSec is available in various custom builds. I'm too lazy to find these. Bug me if you need URL's.