Hello good people. I have installed Hamachi/TeamViewer and I have created a VPN. Everything is done correctly as far as I know. With these 2 programs I have the same issue. When my friend connects to me or I connect to him. I can ping him. But he can't. I don't know what's the cause of this issue because all other my friends can connect to me successfully and ping me also. Any help would be appreciated. Thank you!