모든 내용은 아래의 링크에 포함되어 있습니다. letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/ DST Root CA X3 Expiration (September 2021) - Let's Encrypt Last updated: Apr 6, 2021 | See all Documentation On September 30 2021, there will be a small change in how older browsers and devices trust Let’s Encrypt certificates. If you run a typical website, you won’t notice a difference - the vast majority o..