Reach devices on LAN without gateway setting

NETWORKING SOLUTIONS
1

Hi, I am trying to reach devices connected to a RUT241 LAN with my PC via RMS VPN. I setup according to this video: https://www.youtube.com/watch?v=o2qSTucE7u8

I can reach the RUT241’s WEB-UI and CLI using its local IP. From there, I can ping the device, so its physically connected.

I can reach the device with the gateway setup to the RUT241’s LAN IP - but not if no gateway is setup.

What options are there ?

BR
Rolf

2

Hello,

Thanks for reaching out to us!

Can you please elaborate more on the sentence below?

" I can reach the device with the gateway setup to the RUT241’s LAN IP - but not if no gateway is setup ."

Do you see your PLC’s IP address, when you click “auto scan” on the RMS VPN, ‘add route’ section?

And also, can you please enable LAN masquerading from the Network > Firewall > General Settings section of the WebUI and try again?

Regards,
Caner

4

Thank you very much!

As you said, when I turn on LAN masquerading it works!

BR
Rolf

5

Hello,

I’m glad I could help!

Please don’t hesitate to reach out to us if you have any questions/concerns in the future.

Regards,
Caner

6

Your are welcome!

I guess it would even be better if your RMS VPN solution could please support Layer 2 functionality - see this discussion: broadcast search layer 2

In that way, PLC guys could reach any device physically connected to the RUT’s LAN. Keep in mind fresh SIMATIC PLCs do not have a IP adress at all.

I know that other solutions like “HMS Netbiter” optionally support this feature - they call it “Allow Bridging”.

BR
Rolf

7

Hello,

Thanks for your really good recommendations!

I will directly send this post’s link to our R&D team, they love to consider the recommendations from our clients!

Regards,
Caner

8

That will be great!

I am convinced this would massively enhance the usability of your RMS VPN solution for the PLC community, but also enable using the DCP protocol operating on Layer 2, used by SIEMENS TIA Portal (and probably others as well) to discover and configure devices. DCP - Discovery and Configuration Protocol - PROFINET University.

BR
Rolf

9

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