I have a contractor who has setup a Linksys RV016 firewall behind my network firewall. He is protecting and running a 192.x.x.x network for some PLC's that he can program remotely for one of our departments. We don't want the PLC's on our network, he just wants to VPN to the RV016 through my firewall. I have assigned the RV016 an IP address on my network, opened all the correct ports, and setup a rule to allow the proper traffic to forward. Still not able to create a VPN from that device to his PLC's. Any advice is appreciated.