diff --git a/dns/ddclient/src/opnsense/mvc/app/models/OPNsense/DynDNS/DynDNS.xml b/dns/ddclient/src/opnsense/mvc/app/models/OPNsense/DynDNS/DynDNS.xml
index 0888c87ace..3016f823db 100644
--- a/dns/ddclient/src/opnsense/mvc/app/models/OPNsense/DynDNS/DynDNS.xml
+++ b/dns/ddclient/src/opnsense/mvc/app/models/OPNsense/DynDNS/DynDNS.xml
@@ -142,7 +142,8 @@
                         <web_cloudflare>cloudflare</web_cloudflare>
                         <web_cloudflare_ipv4 value="cloudflare-ipv4">cloudflare-ipv4</web_cloudflare_ipv4>
                         <web_cloudflare_ipv6 value="cloudflare-ipv6">cloudflare-ipv6</web_cloudflare_ipv6>
-                        <web_dyndns>dyndns</web_dyndns>
+                        <web_dynu_ipv4 value="dynu-ipv4">dynu-ipv4</web_dynu_ipv4>
+                        <web_dynu_ipv6 value="dynu-ipv6">dynu-ipv6</web_dynu_ipv6>
                         <web_freedns>freedns</web_freedns>
                         <web_he>he</web_he>
                         <web_icanhazip>icanhazip</web_icanhazip>
diff --git a/dns/ddclient/src/opnsense/scripts/ddclient/lib/address.py b/dns/ddclient/src/opnsense/scripts/ddclient/lib/address.py
index 5618d9aeb6..3450c53cf8 100755
--- a/dns/ddclient/src/opnsense/scripts/ddclient/lib/address.py
+++ b/dns/ddclient/src/opnsense/scripts/ddclient/lib/address.py
@@ -32,7 +32,8 @@
   'cloudflare': '%s://one.one.one.one/cdn-cgi/trace',
   'cloudflare-ipv4': '%s://1.1.1.1/cdn-cgi/trace',
   'cloudflare-ipv6': '%s://[2606:4700:4700::1111]/cdn-cgi/trace',
-  'dyndns': '%s://checkip.dyndns.org/',
+  'dynu-ipv4': '%s://ipcheck.dynu.com/',
+  'dynu-ipv6': '%s://ipcheckv6.dynu.com/',
   'freedns': '%s://freedns.afraid.org/dynamic/check.php',
   'he': '%s://checkip.dns.he.net/',
   'icanhazip': '%s://icanhazip.com/',
@@ -64,7 +65,7 @@ def extract_address(host, txt):
                     return match.group()
                 except ValueError:
                     pass
-    return ""
+    return None
 
 
 def checkip(service, proto='https', timeout='10', interface=None):