Code: HTTP request sent, awaiting response... 200 OK Length: 78564 (77K) [application/octet-stream] Saving to: ‘certbot-auto.9’ certbot-auto.9 100%[==================================>] 76.72K --.-KB/s in 0.008s 2020-12-03 00:51:53 (9.59 MB/s) - ‘certbot-auto.9’ saved [78564/78564] root@sd:/usr/local/bin# chmod a+x certbot-auto root@sd:/usr/local/bin# ./certbot-auto --install-onl Skipping bootstrap because certbot-auto is deprecated on this system. Your system is not supported by certbot-auto anymore. Certbot cannot be installed. Please visit https://certbot.eff.org/ to check for other alternatives. root@sd:/usr/local/bin#
I think Neilpang acme.sh will be installed by ISPConfig if you don't have cerbot installed, so basically it should handle all LE SSL certs when certbot is not found, but I am not very sure because I haven't tested it personally.
Firstly, you've executed the wrong cerbot-auto installer file. The certbot which you've downloaded was saved as certbot-auto.9 and not cerbot-auto unless you forgot to mention that you moved/renamed that file prior execution. If after executing the correct cerbot-auto the installer should still throw the same warning message then follow ahrasis's advice and use acme.sh instead of certbot. acme.sh support should exist, I think since some late ISPConfig 3.1.x version and is definitely supported by the latest ISPConfig release.
