I have an SBS 2008 installation that has been running with no issues. When I enable VPN with the SBS wizard it immediately fails all network connectivity, pinging results in a "general failure" message. I have tried one "solution" configuring RRAS but with no success. Still looking for possible solutions.thanks

You may want to add a default route on your server as below: Open Command prompt as administrator and type the following: >route add -p 0.0.0.0 MASK 255.255.255.255 192.168.1.1{Your default gateway thats connected to your internet}