diff --git a/ddclient.in b/ddclient.in
index 715f201..f2d88f7 100755
--- a/ddclient.in
+++ b/ddclient.in
@@ -5835,12 +5835,14 @@ www.mythic-beasts.com.
 
 Configuration variables applicable to the 'mythicdyn' protocol are:
   protocol=mythicdyn           ##
-  ipv6=no|yes                  ## whether to set an A record (default, ipv6=no)
-                               ## or AAAA record (ipv6=yes).
   login=service-login          ## the user name provided by the admin interface
   password=service-password    ## the password provided by the admin interface
   fully.qualified.host         ## the host registered with the service
 
+Note: this module examines the following v4 & v6 parameters:
+    cmdv[46] fwv[46] usev[46] ipv[46] & ifv[46]
+  and will set either or both V4 and/or V6 addresses as required
+
 Note: this service automatically sets the IP address to that from which the
 request comes, so the IP address detected by ddclient is only used to keep
 track of when it needs updating.
@@ -5869,29 +5871,66 @@ sub nic_mythicdyn_update {
     foreach my $h (@_) {
         info("%s -- Setting IP address.", $h);
 
-        my $ipversion = $config{$h}{'ipv6'} ? '6' : '4';
+        foreach my $mythver ('v4','v6') {
+            my $ipversion = '0';
 
-        my $reply = geturl(
-            proxy     => opt('proxy'),
-            url       => "https://ipv$ipversion.$config{$h}{'server'}/dns/v2/dynamic/$h",
-            method    => 'POST',
-            login     => $config{$h}{'login'},
-            password  => $config{$h}{'password'},
-            ipversion => $ipversion,
-        );
-        unless ($reply) {
-            failed("Updating service %s failed: %s", $h, $config{$h}{'server'});
-            next;
-        }
+            if ($mythver eq 'v4') {
+                info("Checking for IP%s configuration", $mythver);
+                debug("IP Ver : %s", $ipversion);
+                $ipversion = $config{$h}{'cmdv4'} ? '4' : $ipversion;
+                debug("IP Ver : %s    CMDV4 : %s", $ipversion, $config{$h}{'cmdv4'});
+                $ipversion = $config{$h}{'fwv4'} ? '4' : $ipversion;
+                debug("IP Ver : %s    FWV4  : %s", $ipversion, $config{$h}{'fwv4'});
+                $ipversion = $config{$h}{'usev4'} ? '4' : $ipversion;
+                debug("IP Ver : %s    USEV4 : %s", $ipversion, $config{$h}{'usev4'});
+                $ipversion = $config{$h}{'ipv4'} ? '4' : $ipversion;
+                debug("IP Ver : %s    IPV4  : %s", $ipversion, $config{$h}{'ipv4'});
+                $ipversion = $config{$h}{'ifv4'} ? '4' : $ipversion;
+                debug("IP Ver : %s    IFV4  : %s", $ipversion, $config{$h}{'ifv4'});
+            }
 
-        my $ok = header_ok($h, $reply);
-        if ($ok) {
-            $config{$h}{'mtime'}  = $now;
-            $config{$h}{'status'} = "good";
+            if ($mythver eq 'v6') {
+                info("Checking for IP%s configuration", $mythver);
+                debug("IP Ver : %s", $ipversion);
+                $ipversion = $config{$h}{'cmdv6'} ? '6' : $ipversion;
+                debug("IP Ver : %s    CMDV6 : %s", $ipversion, $config{$h}{'cmdv6'});
+                $ipversion = $config{$h}{'fwv6'} ? '6' : $ipversion;
+                debug("IP Ver : %s    FWV6  : %s", $ipversion, $config{$h}{'fwv6'});
+                $ipversion = $config{$h}{'usev6'} ? '6' : $ipversion;
+                debug("IP Ver : %s    USEV6 : %s", $ipversion, $config{$h}{'usev6'});
+                $ipversion = $config{$h}{'ipv6'} ? '6' : $ipversion;
+                debug("IP Ver : %s    IPV6  : %s", $ipversion, $config{$h}{'ipv6'});
+                $ipversion = $config{$h}{'ifv6'} ? '6' : $ipversion;
+                debug("IP Ver : %s    IFV6  : %s", $ipversion, $config{$h}{'ifv6'});
+            }
 
-            success("%s -- Updated successfully.", $h);
-        } else {
-            failed("%s -- Failed to update.", $h);
+              if ($ipversion ne '0') {
+                  info("Process configuration for IP%s --------", $mythver);
+                  my $reply = geturl(
+                      proxy     => opt('proxy'),
+                      url       => "https://ipv$ipversion.$config{$h}{'server'}/dns/v2/dynamic/$h",
+                      method    => 'POST',
+                      login     => $config{$h}{'login'},
+                      password  => $config{$h}{'password'},
+                      ipversion => $ipversion,
+                  );
+                  unless ($reply) {
+                      failed("Updating service %s failed: %s", $h, $config{$h}{'server'});
+                      next;
+                  }
+
+                  my $ok = header_ok($h, $reply);
+                  if ($ok) {
+                      $config{$h}{'mtime'}  = $now;
+                      $config{$h}{'status'} = "good";
+
+                      success("%s -- Updated successfully.", $h);
+                  } else {
+                      failed("%s -- Failed to update.", $h);
+                  }
+              } else {
+                  info("No configuration for IP%s -------------", $mythver);
+            }
         }
     }
 }