I have an Archer C1200, if I connect my printer to the router's USB port and configure the Printer Server, will I be able to print stuff from Android smartphones, or just PCs?

Norton Security was probably using some VPN, antivirus software now have that stupid trend. You just needed to disable it.

Strange... The OpenVPN is not present on the specs of the C7. Yeah no custom firmware for C1200, but you don't need it.

It's also more expensive and doesn't have OpenVPN, meh...

For 100$ get an Asus. Archer C1200 is for around 60$ if you want OpenVPN server.

I found the lack of basic funcionality, that I can even find on my ISP's cheap ass router, a little bit sad and concerning... On the web interface, there is no indication to which port the the wired...