Did you check on it and do you have an answer on the maximum port forwarding rules that the rv345 has? 

v1.1.1.19 (2014-12-01, 12:38:04)

I downgraded to the previous firmware version and it started working again.

I have multiple web servers on my local network, each with a unique domain name. I want any of the devices on the local network to access them by registered domain names and not by IP addresses. That's how NAT Loopback worked on earlier firmware vers...