Hello I know this is a very talked about subject but I have a problem even though Ive gone through all the troubleshooting. We couldn't get Lets encrypt to work with haproxy so we rerouted passed that in our firewall and now it works when I test a --dry-run with certbot but I still cant create via ISPconfig control panel. Tried to create a hello.txt in the /.well-known/acme-challenge folder but cant reach it through website I get 403 - forbidden. I have also tested all the steps in Lets encrypt FAQ. Still get (http-01): urn:ietfarams:acme:error:unauthorized :: The client lacks sufficient authorization. But this works: certbot certonly --standalone --dry-run -d cluster.kulturhotell.se Thanks!