labview over internet

[wellvalley]

I’m working on a project where I’m trying to remotely control a vi through a web-browser. The  page is loaded with the heading, but the vi control panel never loads. The only message displayed is “downloading panel 0,00% of 0 bytes”. I’ve tried the connection at the LAN and it works fine. When I access it through the internet it doesn't work.

What can possibly be wrong?

[AlexNCSU]

  Hi.

   Check wirewall settings.  You may have to disable the firewall on the host computer as well as your local comp.  Also, just to add perhaps the obvious, the computer you are using to access the web VI will need the right labview runtime engine (or full labview).

  --Alex--

[Cory_K]

It may be an issue with your networking.

For example, where I work there are two different networks.

By connecting via LAN, you can get onto the building domain and access all the network resources (drives, printers, other computers, etc)

The wireless network is for non-department computers.

In this setup, no computers connected to the wireless network could access the computers on the domain (without using a VPN connection of course).

You could also see if you are using a local IP address when you should be using a global IP address to connect.

[wellvalley]

Thanks for replies.

The page loads perfect and I can control my VI perfectly. I changed the port in the web server from 80 to 800 and port forwarded all traffic on port 800 to my labview server.

Does anyone know why port 80 didn't work?

[RTSLVU]

---

@wellvalley wrote:

Thanks for replies.

The page loads perfect and I can control my VI perfectly. I changed the port in the web server from 80 to 800 and port forwarded all traffic on port 800 to my labview server.

Does anyone know why port 80 didn't work?

---

Maybe your firewall only allows HTTP traffic on port 80.

[wond3rboy]

Hi, i have the same problem as well. Its about internal and external IPs. IP config tells you internal IP Address(assigned by router) and there is this external IP address. I can access the VI from another computer on the same router but not from another network. Which IP should i use, also tried using the External IP but it(as expected) did not work. 

[wond3rboy]

Hi, i have the same problem as well. Its about internal and external IPs. IP config tells you internal IP Address(assigned by router) and there is this external IP address. I can access the VI from another computer on the same router but not from another network. Which IP should i use, also tried using the External IP but it(as expected) did not work. 

[wellvalley]

If you want to access the VI from a computer through Internet, you have to use your router's external IP. You need to access your router and look for something called port forwarding (or NAT) and set up the router so that all traffic on port 80(lab view web server is by default set up to use port 80) is going to IP adress on the computer where the VI is running.

[wellvalley]

I don't have any firewall installed. Talked to the producer of my router and asked if there is any limitations when port forwarding port 80, and they said no. By the way I'm using a Dovado 3GN and a mobile D-50 USB modem from ice.net. Hmm. Think I go for the easy solution and use port 800 😃