SOLVED: Unable to connect via IP address. Only connects via loopback.

[TheDreadPirate]

You shouldn't add 0.0.0.0 as a binding address. "Bind to local address" should be blank unless you have a specific reason for specifying something else. 0.0.0.0:9222 in ss just indicates that it is listening on that port on all interfaces.

Otherwise your log doesn't show anything obviously wrong.

Also, just because ufw is not active doesn't mean that iptables is off. ufw is just a tool to simplify iptables. It is probably blocking your connections, which is the default behavior (except localhost).

Code:

sudo ufw enable
sudo ufw allow 9222