diff --git a/README.md b/README.md
index eff3bda32..557542ca0 100644
--- a/README.md
+++ b/README.md
@@ -107,189 +107,189 @@ If your DNS provider is not supported, please open an [issue](https://github.com
Core-Networks |
| CPanel/WHM |
+ DDnss (DynDNS Service) |
Derak Cloud |
deSEC.io |
- Designate DNSaaS for Openstack |
+ | Designate DNSaaS for Openstack |
Digital Ocean |
DirectAdmin |
DNS Made Easy |
- DNSExit |
+ | DNSExit |
dnsHome.de |
DNSimple |
DNSPod (deprecated) |
- Domain Offensive (do.de) |
+ | Domain Offensive (do.de) |
Domeneshop |
DreamHost |
Duck DNS |
- Dyn |
+ | Dyn |
DynDnsFree.de |
Dynu |
EasyDNS |
- EdgeCenter |
+ | EdgeCenter |
Efficient IP |
Epik |
Exoscale |
- External program |
+ | External program |
F5 XC |
freemyip.com |
G-Core |
- Gandi |
+ | Gandi |
Gandi Live DNS (v5) |
Gigahost.no |
Glesys |
- Go Daddy |
+ | Go Daddy |
Google Cloud |
Google Domains |
Gravity |
- Hetzner |
+ | Hetzner |
Hosting.de |
Hosting.nl |
Hostinger |
- Hosttech |
+ | Hosttech |
HTTP request |
http.net |
Huawei Cloud |
- Hurricane Electric DNS |
+ | Hurricane Electric DNS |
HyperOne |
IBM Cloud (SoftLayer) |
IIJ DNS Platform Service |
- Infoblox |
+ | Infoblox |
Infomaniak |
Internet Initiative Japan |
Internet.bs |
- INWX |
+ | INWX |
Ionos |
Ionos Cloud |
IPv64 |
- ISPConfig 3 |
+ | ISPConfig 3 |
ISPConfig 3 - Dynamic DNS (DDNS) Module |
iwantmyname (Deprecated) |
JD Cloud |
- Joker |
+ | Joker |
Joohoi's ACME-DNS |
KeyHelp |
Liara |
- Lima-City |
+ | Lima-City |
Linode (v4) |
Liquid Web |
Loopia |
- LuaDNS |
+ | LuaDNS |
Mail-in-a-Box |
ManageEngine CloudDNS |
Manual |
- Metaname |
+ | Metaname |
Metaregistrar |
mijn.host |
Mittwald |
- myaddr.{tools,dev,io} |
+ | myaddr.{tools,dev,io} |
MyDNS.jp |
MythicBeasts |
Name.com |
- Namecheap |
+ | Namecheap |
Namesilo |
NearlyFreeSpeech.NET |
Neodigit |
- Netcup |
+ | Netcup |
Netlify |
Nicmanager |
NIFCloud |
- Njalla |
+ | Njalla |
Nodion |
NS1 |
Octenium |
- Open Telekom Cloud |
+ | Open Telekom Cloud |
Oracle Cloud |
OVH |
plesk.com |
- Porkbun |
+ | Porkbun |
PowerDNS |
Rackspace |
Rain Yun/雨云 |
- RcodeZero |
+ | RcodeZero |
reg.ru |
Regfish |
RFC2136 |
- RimuHosting |
+ | RimuHosting |
RU CENTER |
Sakura Cloud |
Scaleway |
- Selectel |
+ | Selectel |
Selectel v2 |
SelfHost.(de|eu) |
Servercow |
- Shellrent |
+ | Shellrent |
Simply.com |
Sonic |
Spaceship |
- Stackpath |
+ | Stackpath |
Syse |
Technitium |
Tencent Cloud DNS |
- Tencent EdgeOne |
+ | Tencent EdgeOne |
Timeweb Cloud |
TodayNIC/时代互联 |
TransIP |
- UKFast SafeDNS |
+ | UKFast SafeDNS |
Ultradns |
United-Domains |
Variomedia |
- VegaDNS |
+ | VegaDNS |
Vercel |
Versio.[nl|eu|uk] |
VinylDNS |
- Virtualname |
+ | Virtualname |
VK Cloud |
Volcano Engine/火山引擎 |
Vscale |
- Vultr |
+ | Vultr |
webnames.ca |
webnames.ru |
Websupport |
- WEDOS |
+ | WEDOS |
West.cn/西部数码 |
Yandex 360 |
Yandex Cloud |
- Yandex PDD |
+ | Yandex PDD |
Zone.ee |
ZoneEdit |
Zonomi |
- |
diff --git a/cmd/zz_gen_cmd_dnshelp.go b/cmd/zz_gen_cmd_dnshelp.go
index 4c3bcb694..cf2da8563 100644
--- a/cmd/zz_gen_cmd_dnshelp.go
+++ b/cmd/zz_gen_cmd_dnshelp.go
@@ -47,6 +47,7 @@ func allDNSCodes() string {
"constellix",
"corenetworks",
"cpanel",
+ "ddnss",
"derak",
"desec",
"designate",
@@ -973,6 +974,27 @@ func displayDNSHelp(w io.Writer, name string) error {
ew.writeln()
ew.writeln(`More information: https://go-acme.github.io/lego/dns/cpanel`)
+ case "ddnss":
+ // generated from: providers/dns/ddnss/ddnss.toml
+ ew.writeln(`Configuration for DDnss (DynDNS Service).`)
+ ew.writeln(`Code: 'ddnss'`)
+ ew.writeln(`Since: 'v4.32.0'`)
+ ew.writeln()
+
+ ew.writeln(`Credentials:`)
+ ew.writeln(` - "DDNSS_KEY": Update key`)
+ ew.writeln()
+
+ ew.writeln(`Additional Configuration:`)
+ ew.writeln(` - "DDNSS_HTTP_TIMEOUT": API request timeout in seconds (Default: 30)`)
+ ew.writeln(` - "DDNSS_POLLING_INTERVAL": Time between DNS propagation check in seconds (Default: 2)`)
+ ew.writeln(` - "DDNSS_PROPAGATION_TIMEOUT": Maximum waiting time for DNS propagation in seconds (Default: 60)`)
+ ew.writeln(` - "DDNSS_SEQUENCE_INTERVAL": Time between sequential requests in seconds (Default: 60)`)
+ ew.writeln(` - "DDNSS_TTL": The TTL of the TXT record used for the DNS challenge in seconds (Default: 120)`)
+
+ ew.writeln()
+ ew.writeln(`More information: https://go-acme.github.io/lego/dns/ddnss`)
+
case "derak":
// generated from: providers/dns/derak/derak.toml
ew.writeln(`Configuration for Derak Cloud.`)
diff --git a/docs/content/dns/zz_gen_ddnss.md b/docs/content/dns/zz_gen_ddnss.md
new file mode 100644
index 000000000..e159d58b4
--- /dev/null
+++ b/docs/content/dns/zz_gen_ddnss.md
@@ -0,0 +1,68 @@
+---
+title: "DDnss (DynDNS Service)"
+date: 2019-03-03T16:39:46+01:00
+draft: false
+slug: ddnss
+dnsprovider:
+ since: "v4.32.0"
+ code: "ddnss"
+ url: "https://ddnss.de/"
+---
+
+
+
+
+
+
+Configuration for [DDnss (DynDNS Service)](https://ddnss.de/).
+
+
+
+
+- Code: `ddnss`
+- Since: v4.32.0
+
+
+Here is an example bash command using the DDnss (DynDNS Service) provider:
+
+```bash
+DDNSS_KEY="xxxxxxxxxxxxxxxxxxxxx" \
+lego --dns ddnss -d '*.example.com' -d example.com run
+```
+
+
+
+
+## Credentials
+
+| Environment Variable Name | Description |
+|-----------------------|-------------|
+| `DDNSS_KEY` | Update key |
+
+The environment variable names can be suffixed by `_FILE` to reference a file instead of a value.
+More information [here]({{% ref "dns#configuration-and-credentials" %}}).
+
+
+## Additional Configuration
+
+| Environment Variable Name | Description |
+|--------------------------------|-------------|
+| `DDNSS_HTTP_TIMEOUT` | API request timeout in seconds (Default: 30) |
+| `DDNSS_POLLING_INTERVAL` | Time between DNS propagation check in seconds (Default: 2) |
+| `DDNSS_PROPAGATION_TIMEOUT` | Maximum waiting time for DNS propagation in seconds (Default: 60) |
+| `DDNSS_SEQUENCE_INTERVAL` | Time between sequential requests in seconds (Default: 60) |
+| `DDNSS_TTL` | The TTL of the TXT record used for the DNS challenge in seconds (Default: 120) |
+
+The environment variable names can be suffixed by `_FILE` to reference a file instead of a value.
+More information [here]({{% ref "dns#configuration-and-credentials" %}}).
+
+
+
+
+## More information
+
+- [API documentation](https://ddnss.de/info.php)
+
+
+
+
diff --git a/docs/data/zz_cli_help.toml b/docs/data/zz_cli_help.toml
index c2f6ea4c1..3d3043690 100644
--- a/docs/data/zz_cli_help.toml
+++ b/docs/data/zz_cli_help.toml
@@ -152,7 +152,7 @@ To display the documentation for a specific DNS provider, run:
$ lego dnshelp -c code
Supported DNS providers:
- acme-dns, active24, alidns, aliesa, allinkl, alwaysdata, anexia, arvancloud, auroradns, autodns, axelname, azion, azure, azuredns, baiducloud, beget, binarylane, bindman, bluecat, bookmyname, brandit, bunny, checkdomain, civo, clouddns, cloudflare, cloudns, cloudru, cloudxns, com35, conoha, conohav3, constellix, corenetworks, cpanel, derak, desec, designate, digitalocean, directadmin, dnsexit, dnshomede, dnsimple, dnsmadeeasy, dnspod, dode, domeneshop, dreamhost, duckdns, dyn, dyndnsfree, dynu, easydns, edgecenter, edgedns, edgeone, efficientip, epik, exec, exoscale, f5xc, freemyip, gandi, gandiv5, gcloud, gcore, gigahostno, glesys, godaddy, googledomains, gravity, hetzner, hostingde, hostinger, hostingnl, hosttech, httpnet, httpreq, huaweicloud, hurricane, hyperone, ibmcloud, iij, iijdpf, infoblox, infomaniak, internetbs, inwx, ionos, ionoscloud, ipv64, ispconfig, ispconfigddns, iwantmyname, jdcloud, joker, keyhelp, liara, lightsail, limacity, linode, liquidweb, loopia, luadns, mailinabox, manageengine, manual, metaname, metaregistrar, mijnhost, mittwald, myaddr, mydnsjp, mythicbeasts, namecheap, namedotcom, namesilo, nearlyfreespeech, neodigit, netcup, netlify, nicmanager, nicru, nifcloud, njalla, nodion, ns1, octenium, oraclecloud, otc, ovh, pdns, plesk, porkbun, rackspace, rainyun, rcodezero, regfish, regru, rfc2136, rimuhosting, route53, safedns, sakuracloud, scaleway, selectel, selectelv2, selfhostde, servercow, shellrent, simply, sonic, spaceship, stackpath, syse, technitium, tencentcloud, timewebcloud, todaynic, transip, ultradns, uniteddomains, variomedia, vegadns, vercel, versio, vinyldns, virtualname, vkcloud, volcengine, vscale, vultr, webnames, webnamesca, websupport, wedos, westcn, yandex, yandex360, yandexcloud, zoneedit, zoneee, zonomi
+ acme-dns, active24, alidns, aliesa, allinkl, alwaysdata, anexia, arvancloud, auroradns, autodns, axelname, azion, azure, azuredns, baiducloud, beget, binarylane, bindman, bluecat, bookmyname, brandit, bunny, checkdomain, civo, clouddns, cloudflare, cloudns, cloudru, cloudxns, com35, conoha, conohav3, constellix, corenetworks, cpanel, ddnss, derak, desec, designate, digitalocean, directadmin, dnsexit, dnshomede, dnsimple, dnsmadeeasy, dnspod, dode, domeneshop, dreamhost, duckdns, dyn, dyndnsfree, dynu, easydns, edgecenter, edgedns, edgeone, efficientip, epik, exec, exoscale, f5xc, freemyip, gandi, gandiv5, gcloud, gcore, gigahostno, glesys, godaddy, googledomains, gravity, hetzner, hostingde, hostinger, hostingnl, hosttech, httpnet, httpreq, huaweicloud, hurricane, hyperone, ibmcloud, iij, iijdpf, infoblox, infomaniak, internetbs, inwx, ionos, ionoscloud, ipv64, ispconfig, ispconfigddns, iwantmyname, jdcloud, joker, keyhelp, liara, lightsail, limacity, linode, liquidweb, loopia, luadns, mailinabox, manageengine, manual, metaname, metaregistrar, mijnhost, mittwald, myaddr, mydnsjp, mythicbeasts, namecheap, namedotcom, namesilo, nearlyfreespeech, neodigit, netcup, netlify, nicmanager, nicru, nifcloud, njalla, nodion, ns1, octenium, oraclecloud, otc, ovh, pdns, plesk, porkbun, rackspace, rainyun, rcodezero, regfish, regru, rfc2136, rimuhosting, route53, safedns, sakuracloud, scaleway, selectel, selectelv2, selfhostde, servercow, shellrent, simply, sonic, spaceship, stackpath, syse, technitium, tencentcloud, timewebcloud, todaynic, transip, ultradns, uniteddomains, variomedia, vegadns, vercel, versio, vinyldns, virtualname, vkcloud, volcengine, vscale, vultr, webnames, webnamesca, websupport, wedos, westcn, yandex, yandex360, yandexcloud, zoneedit, zoneee, zonomi
More information: https://go-acme.github.io/lego/dns
"""
diff --git a/providers/dns/ddnss/ddnss.go b/providers/dns/ddnss/ddnss.go
new file mode 100644
index 000000000..381151c55
--- /dev/null
+++ b/providers/dns/ddnss/ddnss.go
@@ -0,0 +1,130 @@
+// Package ddnss implements a DNS provider for solving the DNS-01 challenge using DynDNS Service.
+package ddnss
+
+import (
+ "context"
+ "errors"
+ "fmt"
+ "net/http"
+ "time"
+
+ "github.com/go-acme/lego/v4/challenge/dns01"
+ "github.com/go-acme/lego/v4/platform/config/env"
+ "github.com/go-acme/lego/v4/providers/dns/ddnss/internal"
+ "github.com/go-acme/lego/v4/providers/dns/internal/clientdebug"
+)
+
+// Environment variables names.
+const (
+ envNamespace = "DDNSS_"
+
+ EnvKey = envNamespace + "KEY"
+
+ EnvTTL = envNamespace + "TTL"
+ EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
+ EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
+ EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
+ EnvSequenceInterval = envNamespace + "SEQUENCE_INTERVAL"
+)
+
+// Config is used to configure the creation of the DNSProvider.
+type Config struct {
+ Key string
+
+ PropagationTimeout time.Duration
+ PollingInterval time.Duration
+ SequenceInterval time.Duration
+ TTL int
+ HTTPClient *http.Client
+}
+
+// NewDefaultConfig returns a default configuration for the DNSProvider.
+func NewDefaultConfig() *Config {
+ return &Config{
+ TTL: env.GetOrDefaultInt(EnvTTL, dns01.DefaultTTL),
+ PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
+ PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
+ SequenceInterval: env.GetOrDefaultSecond(EnvSequenceInterval, dns01.DefaultPropagationTimeout),
+ HTTPClient: &http.Client{
+ Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
+ },
+ }
+}
+
+// DNSProvider implements the challenge.Provider interface.
+type DNSProvider struct {
+ config *Config
+ client *internal.Client
+}
+
+// NewDNSProvider returns a DNSProvider instance configured for DynDNS Service.
+func NewDNSProvider() (*DNSProvider, error) {
+ values, err := env.Get(EnvKey)
+ if err != nil {
+ return nil, fmt.Errorf("ddnss: %w", err)
+ }
+
+ config := NewDefaultConfig()
+ config.Key = values[EnvKey]
+
+ return NewDNSProviderConfig(config)
+}
+
+// NewDNSProviderConfig return a DNSProvider instance configured for DynDNS Service.
+func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
+ if config == nil {
+ return nil, errors.New("ddnss: the configuration of the DNS provider is nil")
+ }
+
+ client, err := internal.NewClient(&internal.Authentication{Key: config.Key})
+ if err != nil {
+ return nil, fmt.Errorf("ddnss: %w", err)
+ }
+
+ if config.HTTPClient != nil {
+ client.HTTPClient = config.HTTPClient
+ }
+
+ client.HTTPClient = clientdebug.Wrap(client.HTTPClient)
+
+ return &DNSProvider{
+ config: config,
+ client: client,
+ }, nil
+}
+
+// Present creates a TXT record using the specified parameters.
+func (d *DNSProvider) Present(domain, token, keyAuth string) error {
+ info := dns01.GetChallengeInfo(domain, keyAuth)
+
+ err := d.client.AddTXTRecord(context.Background(), dns01.UnFqdn(info.EffectiveFQDN), info.Value)
+ if err != nil {
+ return fmt.Errorf("ddnss: add TXT record: %w", err)
+ }
+
+ return nil
+}
+
+// CleanUp removes the TXT record matching the specified parameters.
+func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
+ info := dns01.GetChallengeInfo(domain, keyAuth)
+
+ err := d.client.RemoveTXTRecord(context.Background(), dns01.UnFqdn(info.EffectiveFQDN))
+ if err != nil {
+ return fmt.Errorf("ddnss: remove TXT record: %w", err)
+ }
+
+ return nil
+}
+
+// Timeout returns the timeout and interval to use when checking for DNS propagation.
+// Adjusting here to cope with spikes in propagation times.
+func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
+ return d.config.PropagationTimeout, d.config.PollingInterval
+}
+
+// Sequential All DNS challenges for this provider will be resolved sequentially.
+// Returns the interval between each iteration.
+func (d *DNSProvider) Sequential() time.Duration {
+ return d.config.SequenceInterval
+}
diff --git a/providers/dns/ddnss/ddnss.toml b/providers/dns/ddnss/ddnss.toml
new file mode 100644
index 000000000..0d0a7132c
--- /dev/null
+++ b/providers/dns/ddnss/ddnss.toml
@@ -0,0 +1,23 @@
+Name = "DDnss (DynDNS Service)"
+Description = ''''''
+URL = "https://ddnss.de/"
+Code = "ddnss"
+Since = "v4.32.0"
+
+Example = '''
+DDNSS_KEY="xxxxxxxxxxxxxxxxxxxxx" \
+lego --dns ddnss -d '*.example.com' -d example.com run
+'''
+
+[Configuration]
+ [Configuration.Credentials]
+ DDNSS_KEY = "Update key"
+ [Configuration.Additional]
+ DDNSS_POLLING_INTERVAL = "Time between DNS propagation check in seconds (Default: 2)"
+ DDNSS_PROPAGATION_TIMEOUT = "Maximum waiting time for DNS propagation in seconds (Default: 60)"
+ DDNSS_SEQUENCE_INTERVAL = "Time between sequential requests in seconds (Default: 60)"
+ DDNSS_TTL = "The TTL of the TXT record used for the DNS challenge in seconds (Default: 120)"
+ DDNSS_HTTP_TIMEOUT = "API request timeout in seconds (Default: 30)"
+
+[Links]
+ API = "https://ddnss.de/info.php"
diff --git a/providers/dns/ddnss/ddnss_test.go b/providers/dns/ddnss/ddnss_test.go
new file mode 100644
index 000000000..5b1d7df58
--- /dev/null
+++ b/providers/dns/ddnss/ddnss_test.go
@@ -0,0 +1,168 @@
+package ddnss
+
+import (
+ "net/http/httptest"
+ "testing"
+
+ "github.com/go-acme/lego/v4/platform/tester"
+ "github.com/go-acme/lego/v4/platform/tester/servermock"
+ "github.com/stretchr/testify/require"
+)
+
+const envDomain = envNamespace + "DOMAIN"
+
+var envTest = tester.NewEnvTest(EnvKey).WithDomain(envDomain)
+
+func TestNewDNSProvider(t *testing.T) {
+ testCases := []struct {
+ desc string
+ envVars map[string]string
+ expected string
+ }{
+ {
+ desc: "success",
+ envVars: map[string]string{
+ EnvKey: "secret",
+ },
+ },
+ {
+ desc: "missing credentials",
+ envVars: map[string]string{},
+ expected: "ddnss: some credentials information are missing: DDNSS_KEY",
+ },
+ }
+
+ for _, test := range testCases {
+ t.Run(test.desc, func(t *testing.T) {
+ defer envTest.RestoreEnv()
+
+ envTest.ClearEnv()
+
+ envTest.Apply(test.envVars)
+
+ p, err := NewDNSProvider()
+
+ if test.expected == "" {
+ require.NoError(t, err)
+ require.NotNil(t, p)
+ require.NotNil(t, p.config)
+ require.NotNil(t, p.client)
+ } else {
+ require.EqualError(t, err, test.expected)
+ }
+ })
+ }
+}
+
+func TestNewDNSProviderConfig(t *testing.T) {
+ testCases := []struct {
+ desc string
+ Key string
+ expected string
+ }{
+ {
+ desc: "success",
+ Key: "secret",
+ },
+ {
+ desc: "missing credentials",
+ expected: "ddnss: missing credentials",
+ },
+ }
+
+ for _, test := range testCases {
+ t.Run(test.desc, func(t *testing.T) {
+ config := NewDefaultConfig()
+ config.Key = test.Key
+
+ p, err := NewDNSProviderConfig(config)
+
+ if test.expected == "" {
+ require.NoError(t, err)
+ require.NotNil(t, p)
+ require.NotNil(t, p.config)
+ require.NotNil(t, p.client)
+ } else {
+ require.EqualError(t, err, test.expected)
+ }
+ })
+ }
+}
+
+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)
+
+ err = provider.CleanUp(envTest.GetDomain(), "", "123d==")
+ require.NoError(t, err)
+}
+
+func mockBuilder() *servermock.Builder[*DNSProvider] {
+ return servermock.NewBuilder(
+ func(server *httptest.Server) (*DNSProvider, error) {
+ config := NewDefaultConfig()
+ config.Key = "secret"
+ config.HTTPClient = server.Client()
+
+ p, err := NewDNSProviderConfig(config)
+ if err != nil {
+ return nil, err
+ }
+
+ p.client.BaseURL = server.URL
+
+ return p, nil
+ },
+ )
+}
+
+func TestDNSProvider_Present(t *testing.T) {
+ provider := mockBuilder().
+ Route("GET /",
+ servermock.ResponseFromInternal("success.html"),
+ servermock.CheckQueryParameter().Strict().
+ With("host", "_acme-challenge.example.com").
+ With("key", "secret").
+ With("txt", "ADw2sEd82DUgXcQ9hNBZThJs7zVJkR5v9JeSbAb9mZY").
+ With("txtm", "1"),
+ ).
+ Build(t)
+
+ err := provider.Present("example.com", "abc", "123d==")
+ require.NoError(t, err)
+}
+
+func TestDNSProvider_CleanUp(t *testing.T) {
+ provider := mockBuilder().
+ Route("GET /",
+ servermock.ResponseFromInternal("success.html"),
+ servermock.CheckQueryParameter().Strict().
+ With("host", "_acme-challenge.example.com").
+ With("key", "secret").
+ With("txtm", "2"),
+ ).
+ Build(t)
+
+ err := provider.CleanUp("example.com", "abc", "123d==")
+ require.NoError(t, err)
+}
diff --git a/providers/dns/ddnss/internal/client.go b/providers/dns/ddnss/internal/client.go
new file mode 100644
index 000000000..a0cf4b4a6
--- /dev/null
+++ b/providers/dns/ddnss/internal/client.go
@@ -0,0 +1,137 @@
+package internal
+
+import (
+ "context"
+ "errors"
+ "fmt"
+ "io"
+ "net/http"
+ "net/url"
+ "strings"
+ "time"
+
+ "github.com/go-acme/lego/v4/providers/dns/internal/errutils"
+ "github.com/go-acme/lego/v4/providers/dns/internal/useragent"
+ "golang.org/x/net/html"
+)
+
+const defaultBaseURL = "https://ddnss.de/upd.php"
+
+// Client the DDns API client.
+type Client struct {
+ auth *Authentication
+
+ BaseURL string
+ HTTPClient *http.Client
+}
+
+// NewClient creates a new Client.
+func NewClient(auth *Authentication) (*Client, error) {
+ if auth == nil {
+ return nil, errors.New("credentials missing")
+ }
+
+ err := auth.validate()
+ if err != nil {
+ return nil, err
+ }
+
+ return &Client{
+ auth: auth,
+ BaseURL: defaultBaseURL,
+ HTTPClient: &http.Client{Timeout: 10 * time.Second},
+ }, nil
+}
+
+func (c *Client) AddTXTRecord(ctx context.Context, host, value string) error {
+ return c.update(ctx, map[string]string{
+ "host": host,
+ "txt": value,
+ "txtm": "1",
+ })
+}
+
+func (c *Client) RemoveTXTRecord(ctx context.Context, host string) error {
+ return c.update(ctx, map[string]string{
+ "host": host,
+ "txtm": "2",
+ })
+}
+
+func (c *Client) update(ctx context.Context, params map[string]string) error {
+ endpoint, err := url.Parse(c.BaseURL)
+ if err != nil {
+ return err
+ }
+
+ query := endpoint.Query()
+
+ for k, v := range params {
+ query.Set(k, v)
+ }
+
+ c.auth.set(query)
+
+ endpoint.RawQuery = query.Encode()
+
+ req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint.String(), nil)
+ if err != nil {
+ return fmt.Errorf("unable to create request: %w", err)
+ }
+
+ useragent.SetHeader(req.Header)
+
+ resp, err := c.HTTPClient.Do(req)
+ if err != nil {
+ return errutils.NewHTTPDoError(req, err)
+ }
+
+ defer func() { _ = resp.Body.Close() }()
+
+ if resp.StatusCode/100 != 2 {
+ raw, _ := io.ReadAll(resp.Body)
+
+ return errutils.NewUnexpectedStatusCodeError(req, resp.StatusCode, raw)
+ }
+
+ raw, err := io.ReadAll(resp.Body)
+ if err != nil {
+ return errutils.NewReadResponseError(req, resp.StatusCode, err)
+ }
+
+ content, err := readPage(raw)
+ if err != nil {
+ return err
+ }
+
+ if strings.Contains(content, "Updated 1 hostname.") {
+ return nil
+ }
+
+ return fmt.Errorf("unexpected response: %s", content)
+}
+
+func readPage(raw []byte) (string, error) {
+ page, err := html.Parse(strings.NewReader(string(raw)))
+ if err != nil {
+ return "", err
+ }
+
+ var b strings.Builder
+ extractText(page, &b)
+
+ return strings.TrimSpace(b.String()), nil
+}
+
+func extractText(n *html.Node, b *strings.Builder) {
+ if n.Type == html.TextNode {
+ text := strings.TrimSpace(n.Data)
+ if text != "" {
+ b.WriteString(text + " ")
+ }
+ }
+
+ for c := n.FirstChild; c != nil; c = c.NextSibling {
+ extractText(c, b)
+ }
+}
diff --git a/providers/dns/ddnss/internal/client_test.go b/providers/dns/ddnss/internal/client_test.go
new file mode 100644
index 000000000..3faddded0
--- /dev/null
+++ b/providers/dns/ddnss/internal/client_test.go
@@ -0,0 +1,56 @@
+package internal
+
+import (
+ "net/http/httptest"
+ "testing"
+
+ "github.com/go-acme/lego/v4/platform/tester/servermock"
+ "github.com/stretchr/testify/require"
+)
+
+func mockBuilder() *servermock.Builder[*Client] {
+ return servermock.NewBuilder[*Client](
+ func(server *httptest.Server) (*Client, error) {
+ client, err := NewClient(&Authentication{Key: "secret"})
+ if err != nil {
+ return nil, err
+ }
+
+ client.BaseURL = server.URL
+ client.HTTPClient = server.Client()
+
+ return client, nil
+ },
+ )
+}
+
+func TestClient_AddTXTRecord(t *testing.T) {
+ client := mockBuilder().
+ Route("GET /",
+ servermock.ResponseFromFixture("success.html"),
+ servermock.CheckQueryParameter().Strict().
+ With("host", "_acme-challenge.example.com").
+ With("key", "secret").
+ With("txt", "ADw2sEd82DUgXcQ9hNBZThJs7zVJkR5v9JeSbAb9mZY").
+ With("txtm", "1"),
+ ).
+ Build(t)
+
+ err := client.AddTXTRecord(t.Context(), "_acme-challenge.example.com", "ADw2sEd82DUgXcQ9hNBZThJs7zVJkR5v9JeSbAb9mZY")
+ require.NoError(t, err)
+}
+
+func TestClient_RemoveTXTRecord(t *testing.T) {
+ client := mockBuilder().
+ Route("GET /",
+ servermock.ResponseFromFixture("success.html"),
+ servermock.CheckQueryParameter().Strict().
+ With("host", "_acme-challenge.example.com").
+ With("key", "secret").
+ With("txtm", "2"),
+ ).
+ Build(t)
+
+ err := client.RemoveTXTRecord(t.Context(), "_acme-challenge.example.com")
+ require.NoError(t, err)
+}
diff --git a/providers/dns/ddnss/internal/fixtures/error.html b/providers/dns/ddnss/internal/fixtures/error.html
new file mode 100644
index 000000000..f0599ad9a
--- /dev/null
+++ b/providers/dns/ddnss/internal/fixtures/error.html
@@ -0,0 +1,12 @@
+
+
+ DDNSS - Kostenloser DynDNS Service : Re-ProutDNS v5.01v
+
+
+
+Error Occurred While Processing Request :
+
+ - badysys : Der System Parameter ist ungültig.
+ - badauth : Die Authorisation ist fehlgeschlagen. Die Parameter username und/oder password sind falsch.
+ - notfqdn : Hostname fehlt oder ist falsch.
+
diff --git a/providers/dns/ddnss/internal/fixtures/success.html b/providers/dns/ddnss/internal/fixtures/success.html
new file mode 100644
index 000000000..f51957334
--- /dev/null
+++ b/providers/dns/ddnss/internal/fixtures/success.html
@@ -0,0 +1,8 @@
+
+
+ DDNSS - Kostenloser DynDNS Service : Re-ProutDNS v5.01v
+
+
+
+Updated 1 hostname.
+
diff --git a/providers/dns/ddnss/internal/types.go b/providers/dns/ddnss/internal/types.go
new file mode 100644
index 000000000..37d41e076
--- /dev/null
+++ b/providers/dns/ddnss/internal/types.go
@@ -0,0 +1,39 @@
+package internal
+
+import (
+ "errors"
+ "net/url"
+)
+
+type Authentication struct {
+ Username string `url:"user,omitempty"`
+ Password string `url:"pwd,omitempty"`
+ Key string `url:"key,omitempty"`
+}
+
+func (a *Authentication) validate() error {
+ if a.Username == "" && a.Password == "" && a.Key == "" {
+ return errors.New("missing credentials")
+ }
+
+ if a.Username != "" && a.Password != "" && a.Key != "" {
+ return errors.New("only one of username, password or key can be set")
+ }
+
+ if (a.Username != "" && a.Password == "") || a.Username == "" && a.Password != "" {
+ return errors.New("username and password must be set together")
+ }
+
+ return nil
+}
+
+func (a *Authentication) set(query url.Values) {
+ if a.Key != "" {
+ query.Set("key", a.Key)
+
+ return
+ }
+
+ query.Set("user", a.Username)
+ query.Set("pwd", a.Password)
+}
diff --git a/providers/dns/zz_gen_dns_providers.go b/providers/dns/zz_gen_dns_providers.go
index fbeef67d0..b4b98e23f 100644
--- a/providers/dns/zz_gen_dns_providers.go
+++ b/providers/dns/zz_gen_dns_providers.go
@@ -41,6 +41,7 @@ import (
"github.com/go-acme/lego/v4/providers/dns/constellix"
"github.com/go-acme/lego/v4/providers/dns/corenetworks"
"github.com/go-acme/lego/v4/providers/dns/cpanel"
+ "github.com/go-acme/lego/v4/providers/dns/ddnss"
"github.com/go-acme/lego/v4/providers/dns/derak"
"github.com/go-acme/lego/v4/providers/dns/desec"
"github.com/go-acme/lego/v4/providers/dns/designate"
@@ -264,6 +265,8 @@ func NewDNSChallengeProviderByName(name string) (challenge.Provider, error) {
return corenetworks.NewDNSProvider()
case "cpanel":
return cpanel.NewDNSProvider()
+ case "ddnss":
+ return ddnss.NewDNSProvider()
case "derak":
return derak.NewDNSProvider()
case "desec":