Hello, Thanks in advance.
I use openvpn for IOT gateways, so I have a Raspberry Pi running Openvpn, then an industrial automation networking running behind it. To get to these devices I have DNAT rules running on the gateway to get to these devices. This works fine until I have multiple PLCs that all use the same port for communication and this port for communication between the manufacturer's PLC software and the PLC cannot be changed. At the moment I switch around the DNAT rules so that I can talk to one PLC at a time, then when I want to talk to a different device I change the rule. This is quite tedious, prone to error and makes diagnosing an interaction problem between two devices on the remote network extremely difficult. Possible Solutions 1. Is it possible for client configs to have/Server configs to push out multiple IP addresses to particular clients? This would be brilliant if this was an option, as I could just add IP for each device and add the NAT rules as required. I cannot find this feature in the documentation/Stackoverflow/Emails, which makes me think this is not an option at the moment. It would be nice to know if it would be practical to add this feature. I did C++ for 4 years when I came out of University, so I should be able to add this feature but I would need some assistance as I haven't contributed to the project yet and I wouldn't know where to start trying to add this. 2. Could I have additional docker-contained clients on the client side to host additional IPs? I think this would work, I assume the performance wouldn't be terrible on a PI 4, although this does feel like a bit of unnecessary virtualisation and quite a bit of work to set up the docker containers. 3. I know I could I have routes through to the IP pools of each gateway, however we have lots of gateways and the majority of local IP addresses for the devices connected to the Gateway are the same. This option feels like a configuration nightmare. 4. Or some other way or method I have not thought about. Thanks, Alexander Franklin
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