I have question about the Certbot and how to use it in ISPconfig. When I create a new site with www.serverdomainname.com and create a new certificate in SSL tab I can't seem to get that to work. SSL Bundle box stays empty. Naturally the website gives "NET::ERR_CERT_AUTHORITY_INVALID" error because the CA is self-signed.
I think I also found a bug. If you enable "Connect Linux userid to webid" and rename a site - apache will fail to restart because the "client" name gets changed in .vhost file to something that might not exist in /etc/group.
startssl certs get created automatically by enabling the startssl checkbox, you do not use the ssl tab for that. using certbot script manually will disable the ability to create letsencrypt certs in ispconfig for this domain. Please use the bugtracker to report bugs: https://git.ispconfig.org/ispconfig/ispconfig3/issues
Letsencrypt is available in ISPConfig starting with the 3.1 version. Older versions do not support letsencrypt.
