Why has SSH access stopped working?

@ihavenoidea wrote:

I recently reinstalled HA onto my Pi4 yesterday and got it all setup and working. I also installed the “Terminal & SSH” addon so I can ssh into the Pi4 from my Mac. After getting it all setup, I confirmed it was working and even copied over my keys.

I’ve tried to login today and it appears I can no longer login via SSH, the connection is refused. Debugging the login attempt says the following:

OpenSSH_7.8p1, LibreSSL 2.6.2
debug1: Reading configuration data /Users/Account/.ssh/config
debug1: /Users/Account/.ssh/config line 9: Applying options for hassio
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 48: Applying options for *
debug1: Connecting to 192.168.1.15 [192.168.1.15] port 22.
debug1: connect to address 192.168.1.15 port 22: Connection refused
ssh: connect to host 192.168.1.15 port 22: Connection refused

Looking at the addon doc it looks like external SSH access is no longer enabled by default (not sure how I accessed it yesterday without any issues). To enable this I need to setup the Network card, but I’m not sure exactly what to setup here. Heres what my Network config looks like

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