ドメインなしのSSL証明書は無理
>Let’s Encrypt may offer IP address certificates in the future, but as of September 2018 we do not.
>If I recall correctly, the standard forbids SSL certificates assigned directly to IP addresses.
"Engineer's way of creating knowledge" the English version of my book is now available on [Engineer's way of creating knowledge]
(C)NISHIO Hirokazu / Converted from [Scrapbox] at [Edit]