Add DNS provider for DynDnsFree.de

[joestr]

Adds a DNS provider for DynDnsFree.de

[ldez]

Hello, in order for a PR adding a DNS provider to be accepted, you have to:

• add a description to your PR
• be able to maintain this provider
• have a homogeneous design with the other providers
• add tests (units)

make test

• add tests ("live")
  

  lego/providers/dns/cloudflare/cloudflare_test.go

  Lines 125 to 151 in c938de6

  	func TestLivePresent(t *testing.T) {
  	if !envTest.IsLiveTest() {
  	t.Skip("skipping live test")
  	}
  	envTest.RestoreEnv()
  	provider, err := NewDNSProvider()
  	require.NoError(t, err)
  	err = provider.Present(envTest.GetDomain(), "", "123d==")
  	require.NoError(t, err)
  	}
  	func TestLiveCleanUp(t *testing.T) {
  	if !envTest.IsLiveTest() {
  	t.Skip("skipping live test")
  	}
  	envTest.RestoreEnv()
  	provider, err := NewDNSProvider()
  	require.NoError(t, err)
  	time.Sleep(2 * time.Second)
  	err = provider.CleanUp(envTest.GetDomain(), "", "123d==")
  	require.NoError(t, err)
  	}

make test

• add a provider descriptor
• generate CLI help, documentation, and readme.

make generate-dns

• be able to do: (and put the output of this command to a comment in your PR)

rm -rf .lego

./lego -m [email protected] --dns YOUR_PROVIDER_NAME -d '*.example.com' -d example.com -s https://acme-staging-v02.api.letsencrypt.org/directory run

Note the wildcard domain is important.

• pass the linter (golangci-lint must be installed):

make checks

• do go mod tidy

[joestr]

• public API documentation
  The API is not publicly documented. It is in the customer panel.
  

  The TTL and life time of the TXT record are set to one hour.

• be able to maintain this provider
  Yep. I can do that.

• be able to do: (and put the output of this command to a comment in your PR)

  joestr@joel-vm3:~/Development/git/github.com/joestr/lego-dyndnsforfree/lego-dyndnsforfree$ export DYNDNSFREE_USERNAME="REDACTED"; export DYNDNSFREE_PASSWORD="REDACTED"; ./dist/lego -m REDACTED --dns dyndnsfree -d *.REDACTED -d REDACTED -s https://acme-staging-v02.api.letsencrypt.org/directory run
  2025/06/19 11:43:09 No key found for account REDACTED. Generating a P256 key.
  2025/06/19 11:43:09 Saved key to /home/joestr/Development/git/github.com/joestr/lego-dyndnsforfree/lego-dyndnsforfree/.lego/accounts/acme-staging-v02.api.letsencrypt.org/REDACTED/keys/REDACTED.key
  2025/06/19 11:43:10 Please review the TOS at https://letsencrypt.org/documents/LE-SA-v1.5-February-24-2025.pdf
  Do you accept the TOS? Y/n
  y
  2025/06/19 11:43:14 [INFO] acme: Registering account for REDACTED
  !!!! HEADS UP !!!!
  
  Your account credentials have been saved in your
  configuration directory at "/home/joestr/Development/git/github.com/joestr/lego-dyndnsforfree/lego-dyndnsforfree/.lego/accounts".
  
  You should make a secure backup of this folder now. This
  configuration directory will also contain certificates and
  private keys obtained from the ACME server so making regular
  backups of this folder is ideal.
  2025/06/19 11:43:14 [INFO] [*.REDACTED, REDACTED] acme: Obtaining bundled SAN certificate
  2025/06/19 11:43:15 [INFO] [*.REDACTED] AuthURL: https://acme-staging-v02.api.letsencrypt.org/acme/authz/206984114/18108076104
  2025/06/19 11:43:15 [INFO] [REDACTED] AuthURL: https://acme-staging-v02.api.letsencrypt.org/acme/authz/206984114/18108076114
  2025/06/19 11:43:15 [INFO] [*.REDACTED] acme: use dns-01 solver
  2025/06/19 11:43:15 [INFO] [REDACTED] acme: Could not find solver for: tls-alpn-01
  2025/06/19 11:43:15 [INFO] [REDACTED] acme: Could not find solver for: http-01
  2025/06/19 11:43:15 [INFO] [REDACTED] acme: use dns-01 solver
  2025/06/19 11:43:15 [INFO] [*.REDACTED] acme: Preparing to solve DNS-01
  2025/06/19 11:43:16 [INFO] [REDACTED] acme: Preparing to solve DNS-01
  2025/06/19 11:43:16 [INFO] [*.REDACTED] acme: Trying to solve DNS-01
  2025/06/19 11:43:16 [INFO] [*.REDACTED] acme: Checking DNS record propagation. [nameservers=127.0.0.53:53]
  2025/06/19 11:43:18 [INFO] Wait for propagation [timeout: 1m0s, interval: 2s]
  2025/06/19 11:43:18 [INFO] [*.REDACTED] acme: Waiting for DNS record propagation.
  2025/06/19 11:43:20 [INFO] [*.REDACTED] acme: Waiting for DNS record propagation.
  2025/06/19 11:43:23 [INFO] [*.REDACTED] acme: Waiting for DNS record propagation.
  2025/06/19 11:43:25 [INFO] [*.REDACTED] acme: Waiting for DNS record propagation.
  2025/06/19 11:43:27 [INFO] [*.REDACTED] acme: Waiting for DNS record propagation.
  2025/06/19 11:43:36 [INFO] [*.REDACTED] The server validated our request
  2025/06/19 11:43:36 [INFO] [REDACTED] acme: Trying to solve DNS-01
  2025/06/19 11:43:36 [INFO] [REDACTED] acme: Checking DNS record propagation. [nameservers=127.0.0.53:53]
  2025/06/19 11:43:38 [INFO] Wait for propagation [timeout: 1m0s, interval: 2s]
  2025/06/19 11:43:45 [INFO] [REDACTED] The server validated our request
  2025/06/19 11:43:45 [INFO] [*.REDACTED] acme: Cleaning DNS-01 challenge
  2025/06/19 11:43:45 [INFO] [REDACTED] acme: Cleaning DNS-01 challenge
  2025/06/19 11:43:45 [INFO] [*.REDACTED, REDACTED] acme: Validations succeeded; requesting certificates
  2025/06/19 11:43:46 [INFO] Wait for certificate [timeout: 30s, interval: 500ms]
  2025/06/19 11:43:48 [INFO] [*.REDACTED] Server responded with a certificate.
  joestr@joel-vm3:~/Development/git/github.com/joestr/lego-dyndnsforfree/lego-dyndnsforfree$ 

[ldez]

Just some notes:

• The original code was not compiling.
• The tests were failing.
• There were unnecessary constants and code.
• The design was not homogeneous with the other providers.
• No API error management.

So either it was a bad copy-paste with no attempt to compile or run and no test execution, or it was AI-generated code.
In both cases, this should be avoided.

[joestr]

It was no AI slop that's for sure. It was an attempt to just get it working. I looked down how the active24 client was implemented but was unsure where to go from there and just called the URL with the parameters i had at hand.

The program did compile at first but I committed to a later point which had some cruft left in. Sorry.

Thank you for the clean up!

[ldez]

LGTM