Hello, I have a laptop, a GE-F650 relay, and a Cudy P5 cellular router (configured as the gateway for my relay and laptop) w/ a SIM card installed at my house. I have a copy of VTScadaLight on my laptop and have successfully set up a tag to read voltage measurements from the relay using modbus over the LAN. At work we have a VTScada cloud based server which i can access via VPN from my home LAN using my laptop via my router. I am able to ping the server. I have the work provided .ovpn installed on my router. I have been assigned a VPN IP. From my home laptop i am able to access the VIC so clearly there is a working connection between my LAN and the server on the other side of the VPN. The problem is when i create an identical tag within the VIC i am getting a 770 port failed to connect error beside my driver. So I guess my question is... can a modbus device be polled through a VPN like this? Or am i wasting my time? My LAN devices all have addresses of the form 192.168.10.XXX. IT says they have added persistent routes for this subnet on their end. They have added firewall rules to allow traffic on port 502 for modbus and port 80 for ICMP/pinging. Am i wrong to think my tag should be set up identically within the VIC as it was within my physical copy of VTScada on the LAN? I have a TCP/IP port connection pointing to 192.168.10.4:502 which is the address of the relay on the LAN. Should the server not be able to poll this device through the VPN as well? Thanks, Justin