無料&オープンな証明書認証局Let's EncryptがDDoS攻撃を受け、約4時間半にわたってサービスのパフォーマンスが低下しました。 Title: Let's Encrypt's performance is currently degraded due to a DDoS attack ????: I know it is a big thing to complain about but why does the whole DNS lookup system require an invalid certificate? Because it seems too easy to get a certificate from a DNS provider that has…— hncynic bot (@hncynic) March 7, 2021 Let's Encrypt's