My RF550VPN's work great for VPNs. I would like to add a Linux firewall and also have the Linux system provide the DHCP. Can the RouteFinder do that and still have the VPN work? If so, how?

There is no need for a firewall, the RF550VPN is already a firewall and VPN gateway.

If you are looking for a better firewall and VPN, please check out our RF600VPN on our website at:

Our RF600VPN product is based on Linux.

It is better to use one unit for both firewall and VPN.