Restricting internet on one radio and not the other

Someone provided information on setup. Do you need more details?

Totally confused now. You don't usually have to open a port to make a cellphone work. Nor does an open port relate to your second point.

  • Step 1 - follow Post No. 2 above to create the Interface/DHCP
  • Step 2 - create an SSID for WiFi (optional)
  • Step 3 - place interface in a new firewall zone that does not permit forwarding to WAN
  • Step 4 - install and configure a file sharing server

Simple.

You could also edit LAN so that it doesn't forward to WAN - and only allow the IP of the cellphone - although, you may have to configure a static address in the cellphone's network/WiFi settings.

EDIT: Duplicate of - Using OpenWrt, SSH, and network config