LetsEncrypt - Firewall issues

I set up DuckDNS and LetsEncrypt ages ago. It was all working fine until I suddenly noticed that it was not. As I can’t remember the tutorial that I followed, I can not go back to my initial notes.

Now when I try access HASS from outside my network the LetsEncrypt log page states “Certbot failed to authenticate some domains (authenticator: standalone)” with the reason stated as “Timeout during connect (likely firewall problem)”. Even though this page also says that there is a log file I can look at, I can’t find it anywhere.

I think I may have accidentally deleted a firewall rule but not sure.
Service Name External Port Internal Port Internal IP Address Protocol
Home Assistant 8123 8123 TCP
Home Assistant 443 8123 TCP
Home Assistant 4357 4357 TCP
Home Assistant Webhooks 80 8123 BOTH
MQTT (Encrypted) 8883 8883 TCP