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hpr3295 :: Renewing a Let's Encrypt cert for Home Network use

How to update a cert when the automatic processes don't work

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Hosted by Ken Fallon on 2021-03-19 is flagged as Clean and is released under a CC-BY-SA license.
Tags: SSL, Let's Encrypt, Intranet.
Listen in ogg, spx, or mp3 format. | Comments (0)

Back in hpr3289 :: NextCloud the hard way, I showed you how to install a Let's Encrypt SSL cert for use on your home network. One of the problems was the fact that the automatic renew tools won't work.

Today I got a reminder email from Let's Encrypt and I used the exact same command to renew it as I did to create it in the first place. The tool is smart enough to know this is a renewal process.

One thing I forgot to do last time was to remove the TXT record from DNS after I was done. So I had to delete the record and wait a while for the Time To Live (TTL) to expire.

I set about doing a check list so the next time the process can be even faster.

  1. Run the command
    certbot certonly --manual --preferred-challenges dns
  2. Deploy a DNS TXT record under the name _acme-challenge.nextcloud.example.com
  3. Finish the challenge.
  4. When successful, remove the DNS TXT record as it's not needed for another two months.

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