I am trying to set up a private network.
Box A is connects to a router which is connected to the internet, is a webserver, and is also the router for a private network. Box A is wireless connections only. Boxes B+ and devices A+ are all supposed to be on the private network, without any access to the internet.
I followed this tutorial: http://blog.noviantech.com/2010/12/22/debian-router-gateway-in-15-minutes/#comments. After restarting, the network interfaces weren't working and I was unable to connect to Box A with Box B. I reversed the changes.
I don't really understand networking that well, and part of the confusion stems from changing standards. For example, in the networking resources I'm reading "allow-hotplug" is never mentioned, and the network interfaces have a new naming standard.
So, how can I get Box A to allow Box B onto a private network?
Or alternatively, a link to a modern tutorial that can show me how to do what I need to.