I am running a PIX 506E using it for VPN access through a DSL modem. The modem is in passthrough and the PIX is taking VPN connections with no issues. All my clients can use local resources on the network, etc.
My Windows clients can ALSO surf the Internet while connected because I did the whole split-tunneling thing. My MAC 10.4 clients, however, cannot. One interesting issue is that the MAC clients can access the Internet through IP, which leads me to believe its some kind of DNS issue. But if it was, why do the Windows computers work?
I checked here on NetPro and found someone that said the split works well through the AirPort card, but not the Intel NIC. In my case the AirPort does NOT work well either.
I'm not sure what I'm doing wrong since all my Windows clients can do everything and the MAC clients can do everything except surf their local Internet unless they type the IP directly into the browser.