I have 6 separate RUT240 routers in a private APN LTE network and Android tablet with the same private APN SIM card. The range of WAN addresses is: 192.168.0.1-7 (192.168.0.1-6 for RUT240 routers and 192.168.0.7 for Android tablet)
Each RUT240 has a LAN address 192.168.x.10 and has 5 devices connected via unmanaged switch with addresses 192.168.x.1-5.
x = network number
I'm able to reach a device located in each network from Android tablet using port forwarding set on RUT240 routers, but I'm not able to reach any device using a device behind RUT240 (in LAN).
I would like to read Modbus TCP on port 502 that is given by S7-1200 PLC in network x (192.168.x.2) using the device (WebHMI) from other network y (192.168.y.1). WebHMI reads Modbus TCP on port 502. I've forwarded all requests from WAN on port 502 to 192.168.x.2 (PLC) on port 502 but it doesn't work.
I hope you can help me to resolve this issue...
Here is an example of network topology for these devices: Network topology