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doc: add CNAME support and gotchas

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mpl 2023-02-09 17:12:06 +01:00 • committed by GitHub
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15
docs/content/https/acme.md
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@ -283,8 +283,19 @@ Use the `DNS-01` challenge to generate and renew ACME certificates by provisioni
# ...
```
!!! important
A `provider` is mandatory.
!!! warning "`CNAME` support"
`CNAME` are supported (and sometimes even [encouraged](https://letsencrypt.org/2019/10/09/onboarding-your-customers-with-lets-encrypt-and-acme.html#the-advantages-of-a-cname)),
but there are a few cases where they can be [problematic](../../getting-started/faq/#why-does-lets-encrypt-wildcard-certificate-renewalgeneration-with-dns-challenge-fail).
If needed, `CNAME` support can be disabled with the following environment variable:
```bash
LEGO_DISABLE_CNAME_SUPPORT=true
```
!!! important
A `provider` is mandatory.
#### `providers`