--- /dev/null
+commit ebdb37245e2033b065cce5a19597be4ef1c8875c
+Author: Carl Mascott <cmascott@yahoo.com>
+Date: Wed Dec 2 11:39:20 2020 +0100
+
+ DuckDNS: Update to use new API.
+
+ The new API supports IPv6 and a token based auth.
+
+ Reference #12415.
+
+ Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>
+
+diff --git a/src/ddns/providers.py b/src/ddns/providers.py
+index 46d8a67..a1ca3f3 100644
+--- a/src/ddns/providers.py
++++ b/src/ddns/providers.py
+@@ -802,16 +802,62 @@ class DDNSProviderDtDNS(DDNSProvider):
+ raise DDNSUpdateError
+
+
+-class DDNSProviderDuckDNS(DDNSProtocolDynDNS2, DDNSProvider):
++class DDNSProviderDuckDNS(DDNSProvider):
+ handle = "duckdns.org"
+ name = "Duck DNS"
+ website = "http://www.duckdns.org/"
+- protocols = ("ipv4",)
++ protocols = ("ipv6", "ipv4",)
+
+ # Information about the format of the request is to be found
+- # https://www.duckdns.org/install.jsp
++ # https://www.duckdns.org/spec.jsp
++
++ url = "https://www.duckdns.org/update"
++ can_remove_records = False
++
++ def update(self):
++ # Raise an error if no auth details are given.
++ if not self.token:
++ raise DDNSConfigurationError
++
++ data = {
++ "domains" : self.hostname,
++ "token" : self.token,
++ }
++
++ # Check if we update an IPv4 address.
++ address4 = self.get_address("ipv4")
++ if address4:
++ data["ip"] = address4
+
+- url = "https://www.duckdns.org/nic/update"
++ # Check if we update an IPv6 address.
++ address6 = self.get_address("ipv6")
++ if address6:
++ data["ipv6"] = address6
++
++ # Raise an error if no address is given.
++ if "ip" not in data and "ipv6" not in data:
++ raise DDNSConfigurationError
++
++ # Send update to the server.
++ response = self.send_request(self.url, data=data)
++
++ # Get the full response message.
++ output = response.read().decode()
++
++ # Remove all leading and trailing whitespace.
++ output = output.strip()
++
++ # Handle success messages.
++ if output == "OK":
++ return
++
++ # The provider does not give detailed information
++ # if the update fails. Only a "KO" will be sent back.
++ if output == "KO":
++ raise DDNSUpdateError
++
++ # If we got here, some other update error happened.
++ raise DDNSUpdateError
+
+
+ class DDNSProviderDyFi(DDNSProtocolDynDNS2, DDNSProvider):