I have a client that has a branch office connected to the main office using a pair of RV042s in a Gateway to Gateway VPN Tunnel Configuration. The connection gets established and works fine for a while. Unexpectedly the tunnel will stop passing traffic even though the RV042s both display connected. Internet traffic is still passed but the tunnel does not. Logging into one of the RV042's and disconnecting the tunnel and letting it automatically reconnect will correct the problem. This happens randomly about once a day. It used to happen more often but I set the Phase 2 SA Lifetime to 28800 and this reduced the frequency. Client is so frustrated that they are ready to scrape the RV042 and by something more reliable. (Considering U.S. Robotics USR8200) Both are running Firmware 1.3.9. The Main Office is connected the Internet using an XData connection with a dedicated IP address. The Branch Office is connected via DSL (Verizon) and has a dynamic IP so I am using FQDN for authentication. Subnet at the Branch is 18.104.22.168, at the main office it is 192.168.16.1.1. Any help on this issue would be appreciated before we re-invest another $600 into hardware.