I have recently set up 4G on my C819-4G and was wondering how do I block all incoming connections on the Cellular0 interface (like a normal WAN firewall)? In CCP I try to set that interface to the WAN zone but the spinner sits there forever and never returns (latest Chrome).
What I am trying to do is block SSH+HTTP, etc on the WAN interface (and only allow that internally on LAN).
Here is my config. https://pastebin.cisco.com/18343
Any help is appreciated!