I have a AnywhereUSB/5 MHC device which has a Sierra Wireless USB modem connected to it. When the device is connected to a server on a local network (but across subnets) it works fine. When I then try to use the modems with the AnywhereUSB device located across a firewall I can connected to the Anywhere but sending GSMAT commands to the modem fails and it seems I can not communicate with the modem despite what appears to be a successful connection. As I say all works well when on the same local network (across subnets).
Any help would be appreciated.