LetsEncrypt SSL 証明書の更新(2025/11/03 実施)
Monday, November 3rd, 2025LetsEncrypt SSLの有効期限が１週間後に迫ってきたので、いつもの更新作業をした。
この証明書の更新作業は、基本的にはcronによる自動更新することも可能だが、私の場合ワイルドカード証明書の更新をするため、DNSレコードの書き換えを更新の都度行う必要があるため手動による作業をおこなっている。
以下、更新時のLogを転記しておく：
[root@Server01 ~]# certbot certonly --manual Saving debug log to /var/log/letsencrypt/letsencrypt.log Please enter the domain name(s) you would like on your certificate (comma and/or space separated) (Enter 'c' to cancel): *.yamasnet.com Renewing an existing certificate for *.yamasnet.com - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Please deploy a DNS TXT record under the name: _acme-challenge.yamasnet.com. with the following value: cLllrumdCEUWZzLPw0njhtR618gZRQ2aVS_g54cqmYQ Before continuing, verify the TXT record has been deployed. Depending on the DNS provider, this may take some time, from a few seconds to multiple minutes. You can check if it has finished deploying with aid of online tools, such as the Google Admin Toolbox: https://toolbox.googleapps.com/apps/dig/#TXT/_acme-challenge.yamasnet.com. Look for one or more bolded line(s) below the line ';ANSWER'. It should show the value(s) you've just added. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Press Enter to Continue Successfully received certificate. Certificate is saved at: /etc/letsencrypt/live/yamasnet.com/fullchain.pem Key is saved at: /etc/letsencrypt/live/yamasnet.com/privkey.pem This certificate expires on 2026-02-01. These files will be updated when the certificate renews. NEXT STEPS: - This certificate will not be renewed automatically. Autorenewal of --manual certificates requires the use of an authentication hook script (--manual-auth-hook) but one was not provided. To renew this certificate, repeat this same certbot command before the certificate's expiry date. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - If you like Certbot, please consider supporting our work by: * Donating to ISRG / Let's Encrypt: https://letsencrypt.org/donate * Donating to EFF: https://eff.org/donate-le - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -