Debug EXE over internet with port forwarding

[paubine]

Hi,

I didn't find info on how to debug an application that is running on a LAN from an internet access? (distance)

I tried at my house using my internet IP forward to my LAN ip machine port 3580 and it says bad IP when I try to debug the application. Everything work if I use the local IP.

Any info?

Thank you.

I basically try to debug an application running (executable) in a plant from my house using the development machine. I though forwarding to the LAN IP port 3580 would work but it doesn't look it does.

[altenbach]

Certain routers don't implement a loopback proxy, so connecting to a device on the same LAN via the public IP address of the router might not work.

Have you tried from a computer that is physically located on the public side?

Does your windows firewall allow connections fom non-local IPs?

Does the debugger session (both sides) allow access form non-local IPs?

Does your router have any additional firewall rules?

[paubine]

Access with Remote Desktop is working on that same computer with port 3389. (Forwarded on the router). I'll check a little bit more your suggestions and let you know. Thanks.

[Sam_Sharp]

There's a guide about it here: http://digital.ni.com/public.nsf/allkb/8DA679805915DE40862572D5007B2F70

It seems that it is just port 3580, don't forget that you also need to enable it through any firewall (e.g windows firewall) on the PC running the executable.

[paubine]

I've read this KB.

All firewall are disabled and port 3580 is allowed to NI Service Locator

It is working if I try to debug the application from a local computer.

What is not working by an external computer. As I mentionned I forward a public ip (ex. 5) to my local computer port 3580.

example 

Internet IP : 1.2.3.4

Local computer : 192.168.0.105

other local computer: 192.168.0.104

on router I forward:

1.2.3.4 port 5 to

192.168.0.105 port 3580

From local computer : In the debug mode I entered: 1.2.3.4:5 to access local computer. not working

From local computer : In the debug mode I entered: 192.168.0.105 to access local computer. working

[altenbach]

Why don't you use the same external port on the router. i.e. foward external IP:3580 to 192.168.0.104:3580? How would the debugger know to use port 5 if you are contacting 1.2.3.4?

What is your router model? Are you absolutely sure it supports loopback?

[paubine]

I added port5 (:5) to 1.2.3.4. --> 1.2.3.4:5

I will try using 3580 insteand of 5 but If I need to be forward to a second local computer to debug, i don't know how I will do that....

I have to check about the DIR-655, some firmeware of it allow loopback, some not. I'll check that first.