Good day all
I am new to this forum. I am also new to networking. I am employed at a Packaging Manufacturing Company in South Africa. The owners have purchased a new machine which is managed through a PC running Windows XP. The manufacturers of the machine (from Taiwan) need to be able to connect to the machine in order to configure and troubleshoot problems. They have insisted on using UltraVNC-100-RC18. I have setup a VPN through which they connect and do whatever needs to be done to sort out problems with the machine settings. The VPN works fine. I had initially set it up in December but for some reason they are unable to connect to the Ultra VNC server. Then weirdly enough in January they were able to connect without me changing any settings. But this week they are unable to connect again. From within the network I am able to connect to the VNC server instantly. I tried myself to dial in through a separate VPN and connect to the Ultra VNC server but am not able to. All settings on the VNC software is default( port 5900,etc). I am able to ping the machine through the VPN as well as 2 PLC's within the machine with no problems. I can connect through the VPN with Remote desktop as well but just cannot connect to the Ultravnc Server on the Xp machine. I have also tried disabling antivirus/firewall on the VPN Server just incase and even uninstalling but that did not work either.
Any help will be greatly appreciated. I am still newbie to networking. What could the problem be?
Thanking you in Advance