VNC is also widely used in educational contexts, for example to allow a distributed group of students simultaneously to view a computer screen being manipulated by an instructor, or to allow the instructor to take control of the students' computers to provide assistance. A very common application of VNC is in remote system administration, where it is used to allow administrators to take control of employee machines to diagnose and fix problems, or to access and administer server machines without making a trip to the console. Popular uses for this technology include remote technical support and accessing files on one's work computer from one's home computer, or vice versa. It transmits the keyboard and mouse events from one computer to another, relaying the graphical screen updates back in the other direction, over a network. In computing, Virtual Network Computing (VNC) is a graphical desktop sharing system that uses the RFB (remote frame buffer) protocol to remotely control another computer. HOW LOGMEIN PROCESS IS DIFFERENT FROM VNC AND VPN VIEWER It appears as though it uses its own proprietary SSL protocol. I don't think LogMeIn uses a VPN tunnel, or point-to-point session. I was wondering if any of you have experience of using logmein to setup a vpn between your programming device and a plc inside an external network?. Now I know how to set them up and with good guides available to download I think these units could be very useful indeed. Talk about a frustrating morning! To top it all off I can't even use the 3G router as there is no mobile telephone reception on site!įrom my experience playing with the ****at the office, I can really see the benefit of them. Unfortunately there was no one on site today that could do that for me. We went through settings over and over and at the end of it the IT company (who were not on site) now believe the fibre router to be faulty or in need of reset. The supporting IT company have forwarded the correct ports etc but the network is not picking up my ****. All lights went green when I plugged them in but I don't have internet access yet. It turns out the network connection point that I was told was ok to connect into is an old fibre system with no users connected to it. It worked fine in the office so took it to site today. I set it up in my office yesterday and had a good tinker with it. I haven't used anything like this before, talk about a learning curve but I have it sussed now (I think!!). I was intending on using it as a service package or commissioning type unit which would mean I wouldn't have to travel to site personally to commission smaller plc systems. Well, I've convinced the customer to allow me to install an E*won 2005 3G router into the system that I had lying around in the office. How do I then go about getting RSLinx to connect to the PLC? How do I go about connecting to the Panelview?Īny help on this would be greatly appreciated. (This I don't want to do.) If I select open tcp/ip ports I can see the IP addresses the PLC and HMI are connected at. I'm not comfortable with this level of access, I asked them to provide me with a VPN connection to their hub and restricted access to only the 2 IP addresses I need connectivity with.Īnyway, using logmein when i am at the dashboard I can select to remotely control the server computer. They then set me up with a logmein VPN to the site server and have seemingly given me full access to the sites network. The IT management company has allowed me to run an ethernet connection from a hub in the same building to my ethernet switch and have given me IP addresses to use. The programming software is only on my laptop. This does not have a local pc directly connected to it. I would like to remote service an ML1400 and Panelview+6 1000 on a site about 60 miles from my base. I was wondering if any of you have experience of using logmein to setup a vpn between your programming device and a plc inside an external network?
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