diff --git a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
index acb434e60..ce1bcb61d 100644
--- a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
+++ b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
@@ -266,6 +266,16 @@
         <id>validation.dns_cyon_password</id>
         <label>Password</label>
         <type>password</type>
+    </field>
+	<field>
+        <label>DDNSS API</label>
+        <type>header</type>
+        <style>table_dns table_dns_ddnss</style>
+    </field>
+    <field>
+        <id>validation.dns_ddnss_token</id>
+        <label>API Token</label>
+        <type>text</type>
     </field>
     <field>
         <label>DirectAdmin</label>
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsDdnss.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsDdnss.php
new file mode 100644
index 000000000..206518b53
--- /dev/null
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsDdnss.php
@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * Copyright (C) 2021 Marcel Koepfli
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+namespace OPNsense\AcmeClient\LeValidation;
+
+use OPNsense\AcmeClient\LeValidationInterface;
+use OPNsense\Core\Config;
+
+/**
+ * DDNSS DNS API
+ * @package OPNsense\AcmeClient
+ */
+class DnsDdnss extends Base implements LeValidationInterface
+{
+    public function prepare()
+    {
+        $this->acme_env['DDNSS_Token'] = (string)$this->config->dns_ddnss_token;
+    }
+}
diff --git a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
index f0345239e..aff07d391 100644
--- a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
+++ b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
@@ -382,6 +382,7 @@
                         <dns_cx>CloudXNS.com API</dns_cx>
                         <dns_cn>Core-Networks API</dns_cn>
                         <dns_cyon>cyon.ch API</dns_cyon>
+                        <dns_ddnss>DDNSS API</dns_ddnss>
                         <dns_desec>deSEC.io API</dns_desec>
                         <dns_dgon>DigitalOcean API</dns_dgon>
                         <dns_da>DirectAdmin API</dns_da>
@@ -524,6 +525,9 @@
                     <Required>N</Required>
                     <default>1</default>
                 </dns_da_insecure>
+                <dns_ddnss_token type="TextField">
+                    <Required>N</Required>
+                </dns_ddnss_token>
                 <dns_dgon_key type="TextField">
                     <Required>N</Required>
                 </dns_dgon_key>