Yama's Memorandum

LetsEncrypt SSL 証明書の更新(2025/5/17 実施)

May 17, 2025 – 4:06 pm

LetsEncrypt SSLの有効期限が10日後に迫ってきたので、いつもどおり更新作業を実施した。

以下、更新時のLog を転記：

[root@Server02 ~]# 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

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Please deploy a DNS TXT record under the name:

_acme-challenge.yamasnet.com.

with the following value:

npctwQs-3KouQEJkRkEDimwxxco_Cl09UZI8vuDHpgU

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.

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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 2025-08-15.
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.

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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
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httpdを更新し、証明書を反映：

[root@Server02 ~]# systemctl restart httpd

更新後の証明書の確認：

[root@Server02 ~]# certbot certificates
Saving debug log to /var/log/letsencrypt/letsencrypt.log

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Found the following certs:
  Certificate Name: yamasnet.com
    Serial Number: 68ba0e67c395d924ad98a37ef8c739fd448
    Key Type: ECDSA
    Domains: *.yamasnet.com
    Expiry Date: 2025-08-15 05:55:11+00:00 (VALID: 89 days)
    Certificate Path: /etc/letsencrypt/live/yamasnet.com/fullchain.pem
    Private Key Path: /etc/letsencrypt/live/yamasnet.com/privkey.pem
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