As to connecting, you can do that now. But I am guessing you need more than connecting to a private LAN.
That is, connecting is trivial. You may have wanted more.
Bob
I have Satellite internet with very rigid upload and download limits. Though I have the highest plan available I still have teenagers, a wife and kids, all with iPhones and computers. So I'm trying to figure out connecting my iPad to my private external hard drive, and my security cameras (still to buy) without using an over the Internet connection but just through a private WiFi Router that only I can access. Any suggestions would be greatly appreciated.

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