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GCPのCloudDNSでDNS-01チャレンジ

Posted at

したいこと

  • 諸事情で80番ポートは使えないけどlet's encryptでSSL認証したい(ので、DNSチャレンジを使う)
  • GAEで動かしているサイトのサブドメインを使いたい

やること

認証はDNSチャレンジでやる。

1.準備

Nginxを停止させる

$ systemctl stop nginx 

Certbotを入れる

$ sudo apt install epel-release
$ sudo apt install certbot

2. 証明書を作成

sudo certbot certonly --manual -d fuga.hogehoge.hoge --preferred-challenges dns

Are you OK with your IP being logged? にYesを押すと、こんなメッセージが出てくる

Please deploy a DNS TXT record under the name
_acme-challenge.fuga.hogehoge.hoge with the following value:

[キー]

Before continuing, verify the record is deployed.

GCPのCloud DNSを開く

(ドメインの設定とかは終わってるものとします)

レコードセットを追加
→ タイプはTXT
→ DNS名を _acme-challenge.fuga.hogehoge.hoge にする
→ TXTデータにさっき出てきたキーを入力
→ 反映されるまで時間がかかるらしいので、水分補給とかして少し待つ(10分くらい?)
→ cmdでEnterを押す

IMPORTANT NOTES:
    Congraturations! (ry

って出てきたら成功

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