I have a Cisco 1750 router that currently has a frame relay connection via T1 to a remote site. My client want to put in a second WAN card and install VPN service, so that people can reach this device from the Internet. A firewall needs to be installed on the router, which I assume will be using NAT for the internal network and Context Based Access lists to monitor traffic. What pitfalls am I going to run into with trying to use a firewall, VPN, and CBAC on the same router? Can this even be done? Any advice would be great.