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@hiroysato(Hiroyuki Sato)

CAA: DNSサーバーを使って、サーバー証明書の発行を許可する認証局を指定する仕組みのメモ

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CAA(Certification Authority Authorization)とは、DNSサーバーを使って、サーバー証明書の発行を許可する認証局を指定する仕組み出そうな。RFC6844

1. DNS CAA

2. 各社の設定

3. digの例

dig caa rms-digicert.ne.jp
;; ANSWER SECTION:
rms-digicert.ne.jp.	85108	IN	CAA	0 issue "digicert.com"
rms-digicert.ne.jp.	85108	IN	CAA	0 issuewild "digicert.com"
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