Have you updated the RV325 to the latest firmware? If not go ahead and do that and then factory default it. You may also want to check if the UML290 can be updated. If it still isn't working, give us a call at the SBSC and we can put in a request to add it. I can't guarantee a timeframe or even if it will be added, but this model has come up before, and the more people that ask for it the more likely it is.
In case issue has not been solved with your verizon dongle, i do advice to contact Cisco small business so we can create case. If your device is still under the one year Tech support we could assist in escalating for Beta software.
Hello, This article will describe how to configure PPTP VPN on the new
RV340/345 routers from the Small Business series. RV340/345
Configuration The first step is to enable the PPTP Server: Go to VPN ->
PPTP Server Change PPTP Server: from Off to On Selec...
Article ID:5748 Use TheGreenBow VPN Client to Connect with RV34x Series
Router Introduction A Virtual Private Network (VPN) connection allows
users to access, send, and receive data to and from a private network by
means of going through a public or share...
Article ID:5728 Configure a Teleworker VPN Client on the RV34x Series
Router Objective The Teleworker VPN Client feature minimizes the
configuration requirements at remote locations by allowing the device to
work as a Cisco VPN hardware client. When the T...