diff --git a/README.md b/README.md
index 952a7d8..aa05b74 100644
--- a/README.md
+++ b/README.md
@@ -30,29 +30,31 @@ Dynamic DNS services currently supported include:
     woima.fi    - See https://woima.fi/ for details
     Yandex      - See https://domain.yandex.com/ for details
     DNS Made Easy - See https://dnsmadeeasy.com/ for details
+    DonDominio  - See https://www.dondominio.com for details
 
-DDclient now supports many of cable/dsl broadband routers. 
+DDclient now supports many of cable/dsl broadband routers.
 
-Comments, suggestions and requests: use the forums on 
+Comments, suggestions and requests: use the forums on
 	http://sourceforge.net/projects/ddclient/
 
-The code was originally written by Paul Burry and is now hosted and maintained  
+The code was originally written by Paul Burry and is now hosted and maintained
 through sourceforge.net. Please check out http://ddclient.sf.net
 
 -------------------------------------------------------------------------------
-REQUIREMENTS:
+## REQUIREMENTS:
 
 - one or more accounts from one of the dynamic DNS services
 
 - Perl 5.014 or later
-  (you need the IO::Socket::SSL perl library for ssl-support,
-  JSON::PP perl library for JSON support and
-  IO::Socket:INET6 perl library for ipv6-support)
+  - `Data::Validate::IP` perl library
+  - `IO::Socket::SSL` perl library for ssl-support
+  - `JSON::PP` perl library for JSON support
+  - `IO::Socket:INET6` perl library for ipv6-support
 
 - Linux or probably any common Unix system
 
 -------------------------------------------------------------------------------
-INSTALLATION:
+## INSTALLATION:
 
     cp ddclient /usr/sbin/
     mkdir /etc/ddclient
@@ -61,6 +63,13 @@ INSTALLATION:
     vi /etc/ddclient/ddclient.conf
     -- and change hostnames, logins, and passwords appropriately
 
+    ## For those using systemd:
+    cp sample-etc_systemd.service /etc/systemd/system/ddclient.service
+    ## enable automatic startup when booting
+    systemctl enable ddclient.service
+    ## start the first time by hand
+    systemctl start ddclient.service
+
     ## For those using Redhat style rc files and using daemon-mode:
     cp sample-etc_rc.d_init.d_ddclient /etc/rc.d/init.d/ddclient
     ## enable automatic startup when booting
@@ -73,17 +82,19 @@ INSTALLATION:
     cp sample-etc_rc.d_init.d_ddclient.alpine /etc/init.d/ddclient
     ## enable automatic startup when booting
     rc-update add ddclient
-    ## make sure you have perl installed 
+    ## make sure you have perl installed
     apk add perl
     ## start the first time by hand
     rc-service ddclient start
-    
+
     ## For those using Ubuntu style rc files and using daemon-mode:
     cp sample-etc_rc.d_init.d_ddclient.ubuntu /etc/init.d/ddclient
     ## enable automatic startup when booting
     update-rc.d ddclient defaults
-    ## make sure you have perl installed 
-    apt-get install perl
+    ## make sure you have perl and the required modules installed
+    apt-get install perl libdata-validate-ip-perl
+    ## if you plan to use cloudflare or feedns you need the perl json module
+    apt-get install libjson-any-perl
     ## start the first time by hand
     service ddclient start
 
@@ -91,7 +102,7 @@ INSTALLATION:
     ## as described below.
 
 -------------------------------------------------------------------------------
-TROUBLESHOOTING:
+## TROUBLESHOOTING:
 
   1. enable debugging and verbose messages.
 	 ``$ ddclient -daemon=0 -debug -verbose -noquiet``
@@ -111,10 +122,10 @@ TROUBLESHOOTING:
 	``fw=url-to-your-router``'s-status-page
 	``fw-skip=any-string-preceding-your-IP-address``
 
-     ddclient does something like this to provide builtin support for 
+     ddclient does something like this to provide builtin support for
      common routers.
      For example, the Linksys routers could have been added with:
-     
+
         fw=192.168.1.1/Status.htm
 	    fw-skip=WAN.*?IP Address
 
@@ -136,7 +147,7 @@ TROUBLESHOOTING:
      while some others accept anything.
 
 -------------------------------------------------------------------------------
-USING DDCLIENT WITH ppp
+## USING DDCLIENT WITH ppp
 
 If you are using a ppp connection, you can easily update your DynDNS
 entry with each connection, with:
@@ -148,7 +159,7 @@ Alternatively, you may just configure ddclient to operate as a daemon
 and monitor your ppp interface.
 
 -------------------------------------------------------------------------------
-USING DDCLIENT WITH cron
+## USING DDCLIENT WITH cron
 
 If you have not configured ddclient to use daemon-mode, you'll need to
 configure cron to force an update once a month so that the dns entry will
@@ -159,7 +170,7 @@ not become stale.
     vi /etc/cron.d/ddclient
 
 -------------------------------------------------------------------------------
-USING DDCLIENT WITH dhcpcd-1.3.17
+## USING DDCLIENT WITH dhcpcd-1.3.17
 
 If you are using dhcpcd-1.3.17 or thereabouts, you can easily update
 your DynDNS entry automatically every time your lease is obtained
@@ -173,19 +184,19 @@ In my case, it is named dhcpcd-eth0.exe and contains the lines:
     #!/bin/sh
     PATH=/usr/sbin:/root/bin:${PATH}
     logger -t dhcpcd IP address changed to $1
-    ddclient -proxy fasthttp.sympatico.ca -wildcard -ip $1 | logger -t ddclient 
+    ddclient -proxy fasthttp.sympatico.ca -wildcard -ip $1 | logger -t ddclient
     exit 0
 
 Other DHCP clients may have another method of calling out to programs
-for updating DNS entries. 
+for updating DNS entries.
 
 Alternatively, you may just configure ddclient to operate as a daemon
 and monitor your ethernet interface.
 
 -------------------------------------------------------------------------------
-USING DDCLIENT WITH dhclient
+## USING DDCLIENT WITH dhclient
 
-If you are using the ISC DHCP client (dhclient), you can update 
+If you are using the ISC DHCP client (dhclient), you can update
 your DynDNS entry automatically every time your lease is obtained
 or renewed by creating an executable file named:
     /etc/dhclient-exit-hooks
diff --git a/README.ssl b/README.ssl
index 27b9f5b..3aa579b 100644
--- a/README.ssl
+++ b/README.ssl
@@ -10,3 +10,4 @@ ssl support is tested on folowing dynamic dns providers:
 - dyndns.com
 - freemyip.com
 - DNS Made Easy
+- dondominio.com
diff --git a/ddclient b/ddclient
index a1c4912..38a38a3 100755
--- a/ddclient
+++ b/ddclient
@@ -489,6 +489,9 @@ my %variables = (
     'dnsmadeeasy-common-defaults'   => {
         'server'          => setv(T_FQDNP,  1, 0, 1, 'cp.dnsmadeeasy.com',    undef),
         'script'          => setv(T_STRING, 1, 1, 1, '/servlet/updateip',     undef),
+    },    
+    'dondominio-common-defaults'       => {
+        'server'	      => setv(T_FQDNP,  1, 0, 1, 'dondns.dondominio.com', undef),
     },
 );
 my %services = (
@@ -711,11 +714,20 @@ my %services = (
                           $variables{'service-common-defaults'},
                         ),
     },
+    'dondominio' => {
+        'updateable' => undef,
+        'update'     => \&nic_dondominio_update,
+        'examples'   => \&nic_dondominio_examples,
+        'variables'  => merge(
+            $variables{'dondominio-common-defaults'},
+            $variables{'service-common-defaults'},
+            ),
+    },
 );
 $variables{'merged'} = merge($variables{'global-defaults'},
-			     $variables{'service-common-defaults'},
-			     $variables{'dyndns-common-defaults'},
-			     map { $services{$_}{'variables'} } keys %services,
+    $variables{'service-common-defaults'},
+    $variables{'dyndns-common-defaults'},
+    map { $services{$_}{'variables'} } keys %services,
 );
 
 my @opt = (
@@ -4825,6 +4837,80 @@ sub nic_woima_update {
     }
 }
 
+######################################################################
+## nic_dondominio_examples
+######################################################################
+sub nic_dondominio_examples {
+    return <<EoEXAMPLE;
+o 'dondominio'
+The 'dondominio' protocol is used by DNS service offered by www.dondominio.com/ .
+API information and user instructions available at: https://dev.dondominio.com/dondns/docs/api/
+Configuration variables applicable to the 'dondominio' protocol are:
+  protocol=dondominio          ##
+  login=service-login          ## the username registered with the service
+  password=dondominio-apikey   ## API key provided by dondominio -see link above-
+  fully.qualified.host         ## the host registered with the service.
+Example ${program}.conf file entries:
+  ## single host update
+  protocol=dondominio,                                   \\
+  login=my-generated-user-name,                          \\
+  password=dondominio-apikey                             \\
+  myhost.tld
+
+EoEXAMPLE
+}
+
+######################################################################
+## nic_dondominio_examples
+######################################################################
+
+sub nic_dondominio_update {
+    debug("\nnic_duckdns_update -------------------");
+
+    ## update each configured host
+    ## should improve to update in one pass
+    foreach my $h (@_) {
+        my $ip = delete $config{$h}{'wantip'};
+        info("setting IP address to %s for %s", $ip, $h);
+        verbose("UPDATE:","updating %s", $h);
+
+        # Set the URL that we're going to update
+        my $url;
+        $url  = "https://$config{$h}{'server'}/plain/";
+        $url .= "?user=";
+        $url .= $config{$h}{'login'};
+        $url .= "&password=";
+        $url .= $config{$h}{'password'};
+        $url .= "&host=";
+        $url .= $h;
+        $url .= "&ip=";
+        $url .= $ip if $ip;
+
+
+        # Try to get URL
+        my $reply = geturl(opt('proxy'), $url);
+
+        # No response, declare as failed
+        if (!defined($reply) || !$reply) {
+            failed("updating %s: Could not connect to %s.", $h, $config{$h}{'server'});
+            last;
+        }
+        last if !header_ok($h, $reply);
+
+        my @reply = split /\n/, $reply;
+        my $returned = pop(@reply);
+        if ($returned =~ /OK/) {
+            $config{$h}{'ip'}     = $ip;
+            $config{$h}{'mtime'}  = $now;
+            $config{$h}{'status'} = 'good';
+            success("updating %s: good: IP address set to %s", $h, $ip);
+        } else {
+            $config{$h}{'status'} = 'failed';
+            failed("updating %s: Server said: '$returned'", $h);
+        }
+    }
+}
+
 ######################################################################
 ## nic_dnsmadeeasy_examples
 ######################################################################
@@ -4871,6 +4957,8 @@ sub nic_dnsmadeeasy_update {
         'success' => 'Record successfully updated!',
     );
 
+    ## update each configured host
+    ## should improve to update in one pass
     foreach my $h (@_) {
         my $ip = delete $config{$h}{'wantip'};
         info("Setting IP address to %s for %s", $ip, $h);
@@ -4912,7 +5000,6 @@ sub nic_dnsmadeeasy_update {
     }
 }
 
-
 ######################################################################
 # vim: ai ts=4 sw=4 tw=78 :
 
diff --git a/sample-etc_systemd.service b/sample-etc_systemd.service
new file mode 100644
index 0000000..c6418a4
--- /dev/null
+++ b/sample-etc_systemd.service
@@ -0,0 +1,11 @@
+[Unit]
+Description=Dynamic DNS Update Client
+After=network.target
+
+[Service]
+Type=forking
+PIDFile=/var/run/ddclient.pid
+ExecStart=/usr/sbin/ddclient
+
+[Install]
+WantedBy=multi-user.target
diff --git a/sample-get-ip-from-fritzbox b/sample-get-ip-from-fritzbox
index 87b986e..c17e775 100755
--- a/sample-get-ip-from-fritzbox
+++ b/sample-get-ip-from-fritzbox
@@ -15,6 +15,6 @@
 
 curl -s -H 'Content-Type: text/xml; charset="utf-8"' \
   -H 'SOAPAction: urn:schemas-upnp-org:service:WANIPConnection:1#GetExternalIPAddress' \
-  --data-binary '<?xml version="1.0" encoding="utf-8"?><s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><s:Body><u:GetExternalIPAddress xmlns:u="urn:schemas-upnp-org:service:WANIPConnection:1" /></s:Body></s:Envelope>' \
-  http://169.254.1.1:49000/upnp/control/WANCommonIFC1 | \
-  sed -n -e 's#^.*<NewExternalIPAddress>\(.*\)</NewExternalIPAddress>.*$#\1#p'
+  -d '<?xml version="1.0" encoding="utf-8"?><s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"> <s:Body> <u:GetExternalIPAddress xmlns:u="urn:schemas-upnp-org:service:WANIPConnection:1" /></s:Body></s:Envelope>' \
+  'http://fritz.box:49000/igdupnp/control/WANIPConn1' | \
+  grep -Eo '\<[[:digit:]]{1,3}(\.[[:digit:]]{1,3}){3}\>'