I understand you and you are completely right. I just wanted to share the result of my 6 month research on this problem. Often the methods you specify can provide the solution. Unfortunately, it didn't work for…"
Its a common problem with VP series. It's not about ip, cable, antivirus, etc..
The problem is ethernet connection chip on the board. You need to find a tech guy who can repair the board and replace a new Realtek ethernet chip. It…"