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Hi Dave,
Thanks for your help. Stopping the firewall did not effect my ability to ssh. I lacked time to really mess around too long with it, so I wiped the server and started again. All of the mission critical mails were backed up, so I guess it just gives me cause to redo all of the websites...
I just attempted to update my install from 18.0.40 to 18.0.43 and since I have not been able to connect to the server externally. That means websites don't load but more importantly I am unable to SSH in via Putty. I have to use the the server side VNC client provided by my VPS host to access...
Whenever I attempt to issue or renew a Let's Encrypt SSL certificate on any domain connected to the server, I get the following error.
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Could not issue an SSL/TLS certificate for...