Groov Node-RED tcp input

groov View
1

Is there a firewall on a GROOV-AR1-BASE that might be preventing a remote connection to a tcp node running on its Node-RED server?

I created a test flow on the groov with just a tcp input node set to “Listen” on port 8000 (server). On my laptop I’ve tried connected to it on that port (using a couple of terminal programs) but it fails. I’ve also tried other ports like 4000 and 11000.

Alternatively, I have tried setting the tcp input node to “Connect” to my laptop (client) and that succeeds.

I’ve got a copy of Node-RED on my laptop and it doesn’t have this issue.

Will Node-RED on the groov not accept incoming tcp connections?

2

Yes, the AR1 has a firewall, and unlike the EPIC there is no user access to it.
(How comfortable are you with Linux command line?)

3

I’m not familiar with Linux so not very. What would be involved?

Any alternatives like HTTP or are there any open ports I could use? It’s not as big a deal in my case, I can use it as a client, it’s just there may be multiple connecting devices and I don’t want to have to create a tcp node for every one.

4

Perhaps MQTT would be an option you could look at?
You can publish and subscribe to messages (tags) from a broker and you don’t need to open any ports as everything is outbound.

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5

Thanks, I’ll look into it.

Were you implying before that I could have access to the firewall if I accessed the command line?

6

That’s one backdoor option.
A better option would be to look at the EPIC PR1 processor.
It has Node-RED and full firewall access with no Linux command line required.

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7

Hi Beno, I will need more information about that AR1 backdoor.

8

Hi Beno, actually I have the same issue, trying to connect TCP nodes for an application, it looks like I will have to open firewall ports for my GROOV-AR1-BASE (PR1 processor is not an option for me), is there anything I can do?, talking about the “backdoor” option I would like to know more about (how to access SSH on AR1).

Regards,
Hector.