Let's Encrypt Wildcard Certificate Certbot

Introduction

Let's Encrypt supports wildcard certificate via ACMEv2 using the DNS-01 challenge, which began on March 13, 2018. Certbot, its client, provides --manual option to carry it out. I sincerely appreciate them.

I write how I generated my wildcard certificate with Certbot. It was a very simple task : ) All what was necessary in addition is to add a TXT record specified by Certbot to the DNS server.

• Caution: As it is necessary to update Let's Encrypt's certificate every 90 days, a new TXT record is required at every renewal.

Body Environment

   Certbot: >0.32.0

Tutorial

The command is like this:

# certbot certonly --manual --preferred-challenges dns --server https://acme-v02.api.letsencrypt.org/directory --manual-public-ip-logging-ok -d '*.<your.domain1>' -d <your.domain1> -d '*.<your.domain2>' -d <your.domain2>

Make sure to quote *.<your.domain> to avoid the error "no matches found: *.<your.domain>".

• Note: the order of -d *.<your.domain> and -d <your.domain> didn't seem to matter.

Here is the comparison of certonly options with a single certificate:

- --webroot -w <dir-path>
+ --manual --preferred-challenges dns --server https://acme-v02.api.letsencrypt.org/directory --manual-public-ip-logging-ok

Besides, the detail of its command line options is here.

Then, the command replies:

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator manual, Installer None
Obtaining a new certificate
Performing the following challenges:
dns-01 challenge for <your.domain>

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Please deploy a DNS TXT record under the name
_acme-challenge.<your.domain> with the following value:

<acme-challenge-value>

Before continuing, verify the record is deployed.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Press Enter to Continue

Configure the DNS server to add a record to your domain.
The record is like this:
Where 	What
Type 	TXT
Name 	_acme-challenge
Value 	<acme-challenge-value> the command shows above

• Анхаарах: DNS тохиргоо идэвхжих хүртэл хэдэн минут хүлээсний дараа Enter дарах хэрэгтэй.

Waiting for verification...
Cleaning up challenges

IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/<your.domain>/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/<your.domain>/privkey.pem
   Your cert will expire on 2019-08-01. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot
   again. To non-interactively renew *all* of your certificates, run
   "certbot renew"
 - 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

Done : )

Эх сурвалж:

https://dev.to/nabbisen/let-s-encrypt-wildcard-certificate-with-certbot-plo