Accessing Arduino Yun from Internet

Question

I am trying to access my Arduino Yun from the internet, and it's not quite working. I have correctly port forwarded the port 5555 from the router to the Yun (verified I am able to access my many other NAT'd resources).

I can access the Yun from my internal network.

In the Arduino sketch I have this (among many other things). Mainly taken from example sketches.

#include <Bridge.h>
#include <HttpClient.h>
#include <YunServer.h>
#include <YunClient.h>
YunServer server;
void setup {
 // Listen for incoming connections on port 5555
 server.noListenOnLocalhost();
 server.begin();
}

Is server.noListenOnLocalhost(); the right one to use to access from the outside world?

Answer 1

Well, I'm not familiar with the Yun, but the first thing that stands out is the missing

Bridge.begin();

line apparently needed to initialize the Bridge library that you use.

And you do have something like

YunClient client = server.accept();

and "more" in the main loop (or a function where applicable) of your code, right ?

And yes, noListenOnLocalhost() is the correct function for serving external clients.

• Pat: Yes, I have Bridge.begin(); and YunClient client = server.accept(); is there within the loop. I'm able to access everything internally, just not externally.
• Pat: So your answer helped me validate that what I am doing is correct. I'll mark it as solved. What ended up happening is that my router didn't save the NAT for port 5555. So I re-did that, and it's good. Thanks again for verifying that noListenOnLocalhost() is correct for external hits!
• FredP: @Pat Glad to have... ahem... "helped" :-)
• Pat: You did! I wasn't sure if noListenOnLocalhost() was correct, and the documentation on noListenOnLocalhost vs listenOnLocalhost wasn't overly clear (I think they both say the exact same thing).
• FredP: The doc is "correct", but indeed not very explicit regarding internal VS external. And I must admit that when I first saw the function name I found it rather suspect.