Connecting to Volttron Central server from Windows PC on device LAN - volttron

I have a RPi running an instance of volttron-central. I can VNC into the RPi and view the Web UI from a browser pointed to localhost, so I know that it is running. However, when I attempt to connect from a PC connected to the same LAN using the RPi's IP address, I get "refused to connect" error.
Is this a security feature? If so, is there any-way of viewing the WEB UI from a different machine, or does it need to be running an instance of volttron-central locally?

Edit your config file to use an external address (e.g. not In VOLTTRON_HOME (~/.volttron) edit the config file. Change the bind-web-address setting to equal (what you have above as to Then restart the platform.
Note: you should also make sure your /etc/hosts file has a mapping from the onto your hostname, then you could goto https://foo:8080 rather than using the address. This will work with the bind-web-address, but not the vip-address.


Is there a way in OpenVPN to change the VPN server ip or location and this can be done on my system using OPENVPN

So I am in need to some info about openVPN that allows to change VPN server Ip or location.
The idea basically is if there is a way to change VPN server location and restart openVPN in my system so the IP gets changed of connecting VPN server so the website will see the updated IP address in my HTTPS request. May some commands that I can use in bash script and run the script from my program so Ip gets updated of VPN server. Is it doable in C and Linux,OpenVPN. if there is any pure C solution then that will be awesome, Is there a way of doing it?

Why can't I connect to my create-react-app local development server from my other computer?

I have a react client running locally on my machine using react-scripts. I can work with it normally on that machine. I also have a nodeJS server running on a different port. I figured I should be able to connect to these from my other computer or cellphone and I can connect to the server using my local IPv4 address + server port, but when I try to connect to the client using the same address + client port I get a loading spinner in the browser tab and the connection times out after some time.
I figured it might be a firewall issue so I added an inbound rule (and an outbound one though I don't think that should do anything) on the machine running the client+server letting all traffic through the relevant port but this changed nothing. When I do a network diagnostic using chrome from the tab where I can't open the client it tells me the webpage is online but isn't responding. I get the same behavior when connection from my cellphone.
One thing that might be of note is that when I serve the build folder of my app through my NodeJS server, the app opens just fine on the other computer using the server port but I don't want to have to build my app after every change manually.
What could this be down to?
EDIT: Forgot to mention, all devices are on the same router. The laptop running the servers and the cellphone are connected via wireless and the PC is connected via ethernet.

Error connecting to workgroup Remote Desktop client printer from domain host computer

I'm connecting remotely from home (Workgroup) Win7 PC to an office (Domain) Win7 PC using VPN and Remote Desktop. Remote Desktop connects fine but doesn't share my local resources no matter what I do. So to print from host (office) to client (home) I've set up printer network sharing (it's an HP printer connected at home via USB) and created a separate regular user without login privileges. Every several weeks something happens and the connection stops working.
Most recently, connection attempts to the remote printer return error 0x00000709.
Troubleshooting I've done:
Turned off firewall on both RDP client (home) and host (office) computers
Confirmed \\x.x.x.x\c$ is accessible from host to client
Cleared all connections using "net use" in command prompt (\\x.x.x.x\IPC$ usually appears after I open explorer to the client machine IP address and authenticate with the workgroup user account)
Confirmed the client VPN IP address is the same (when it changes, I have to reconnect the printer via explorer)
On client, tried to connect to printer via \\localhost in explorer and got the same error.
It drives me crazy that this works for a while and then stops with no apparent rhyme or reason. Windows updates might be the cause but the last update since this last happened was Microsoft Removal Tool (this morning) and it doesn't make sense this would cause the problem.
Any ideas what to try next?
Ultimately, disabling IPv6 on the home PC's Local Connection adapter resolved the issue.
During troubleshooting, I was able to connect the office PC to another home PC (connected over AnyConnect VPN client) for file and print sharing, further complicating root cause analysis. I used WireShark to check outgoing packets from the office PC but was unable to check incoming packets on either home PC due to encryption on the VPN interface. WireShark revealed SMB connections were being successfully requested, opened AFAIK, and closed.
The issue was temporarily resolved when I rebooted both the target home PC and the Cisco ASA. This resulted in a new VPN IP address being assigned to the home PC. The issue returned 1-2 days later. Logging into the office PC with a different domain account did not resolve the issue. Disabling IPv6 on the home PC's Local Connection adapter did resolve it. I thought to do this after noticing the public IP address given on was an IPv6 address, where in the past I've always seen an IPv4 address.
I hope this helps someone.

Unable to establish connection to server on a static ip

Objective : I am trying to establish a test environment with a test server instance running on a static machine. I wish to be able to connect/make use/test code against this server running from all other machines on the same local network.
Problem :
I am unable to establish a connection to the appserver that is running on a machine with static ip. It's an appengine server and runs without errors ( tested ). Connection can be established from the browser on the local machine but when trying to connect from any browser on another machine in the same network then no connection is established.
The same setup is made available for jenkins server and jenkins dashboard can be accessed from all other machines in the network.
If you are running a local version of app engine, you can use the --host option. --host= myapp
The host address to use for the server. You may need to set this to be able to access the development server from another computer on your network. An address of allows both localhost access and hostname access. Default is localhost.
For java, use the --address option instead.

Opening ports for Windows Azure Virtual Machine

I have a Sql Server instance installed on my Azure Virtual Machine. I've changed the port for Sql Server to...let's say 4849. I opened this port in Windows Firewall and established the endpoint for both TCP and UDP. I check to see if the port is open via and it's still closed. What am I missing here?
I'm utilizing SQL Server 2012 SP1 on Windows Server 2012.
Thanks in advance!
Not sure how this service checks for opened ports, but if it doing so by sending "ping" command then it may not work. You would need to do additional stuff for that to work. Please check this blog post for more details:
Does this need to be accessible to the outside world? If so, you will need to open it on your firewall and have the firewall forward traffic on that port to your VM.
Also, you might need to check the config of your VM network adapter, if it's using NAT to share the hosts IP address, you might encounter problems, depending on what host you're using, I find that bridged mode works best so that the VM can use it's own IP address on the network.
I think you can also try this one to enable PING command for Azure virtual machine: