I have a simple LAN connecting to a router through ISA Server. One internal NIC and one external NIC. Everything works fine until I try to allow incoming VPN connections. As soon as I run the wizard none of my internal clients can connect to the internet or do a DNS look-up. They can't even ping the ISA Server. It will allow VPN clients to connect but there is no connectivity to the rest of my internal LAN so users can't be verified against the PDC. If I disable RRAS everything works again, but VPN no longer works. Any help would be greatly appreacited.