diff --git a/ddclient b/ddclient
index 3e3bd8f..3ebcb17 100755
--- a/ddclient
+++ b/ddclient
@@ -292,6 +292,7 @@ my %builtinfw = (
     },
 );
 my %ip_strategies = (
+     'no'                     => ": do not obtain an IPv4 address for this host",
      'ip'                     => ": obtain IP from -ip {address}",
      'web'                    => ": obtain IP from an IP discovery page on the web",
      'fw'                     => ": obtain IP from the firewall specified by -fw {type|address}",
@@ -307,6 +308,7 @@ sub ip_strategies_usage {
 
 
 my %ipv6_strategies = (
+     'no'                     => ": do not obtain an IPv6 address for this host",
      'ip'                     => ": obtain IP from -ipv6 {address}",
      'if'                     => ": obtain IP from the -if {interface}",
      'cmd'                    => ": obtain IP from the -cmdv6 {external-command}",
@@ -391,7 +393,7 @@ my %variables = (
 	'host'                => setv(T_STRING, 1, 1, 1, '',                  undef),
 
 	'use'                 => setv(T_USE,   0, 0, 1, 'ip',                 undef),
-	'usev6'               => setv(T_USE,   0, 0, 1, undef,                undef),
+	'usev6'               => setv(T_USEV6, 0, 0, 1, undef,                undef),
 	'if'                  => setv(T_IF,    0, 0, 1, 'ppp0',               undef),
 	'if-skip'             => setv(T_STRING,0, 0, 1, '',                   undef),
 	'web'                 => setv(T_STRING,0, 0, 1, 'dyndns',             undef),
@@ -947,7 +949,7 @@ sub update_nics {
 			} else {
 				$ip = get_ip($use, $h);
 				if (!defined $ip || !$ip) {
-					warning("%s: unable to determine IPv4 address", $h)
+					warning("%s: unable to determine IPv4 address with strategy use=%s", $h, $use)
 						if !$daemon || opt('verbose');
 				} elsif ($ip !~ /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/) {
 					warning("%s: malformed IPv4 address (%s)", $h, $ip);
@@ -963,7 +965,7 @@ sub update_nics {
 				} else {
 					$ipv6 = get_ipv6($usev6, $h);
 					if (!defined $ipv6 || !$ipv6) {
-						warning("%s: unable to determine IPv6 address", $h)
+						warning("%s: unable to determine IPv6 address with strategy usev6=%s", $h, $usev6)
 							if !$daemon || opt('verbose');
 					} elsif ($ipv6 !~ /^(((?=.*(::))(?!.*\3.+\3))\3?|([\dA-F]{1,4}(\3|:\b|$)|\2))(?4){5}((?4){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4})\z/ai) {
 						# That little gem from http://home.deds.nl/~aeron/regex/
@@ -2273,35 +2275,35 @@ sub get_ip {
     $arg = '' unless $arg;
 
     if ($use eq 'ip') {
-	$ip  = opt('ip', $h);
-	$arg = 'ip';
+		$ip  = opt('ip', $h);
+		$arg = 'ip';
 
     } elsif ($use eq 'if') {
-	$skip  = opt('if-skip', $h)  || '';
-	$reply = `ifconfig $arg 2> /dev/null`;
-	$reply = `ip addr list dev $arg 2> /dev/null` if $?;
-	$reply = '' if $?;
+		$skip  = opt('if-skip', $h)  || '';
+		$reply = `ifconfig $arg 2> /dev/null`;
+		$reply = `ip addr list dev $arg 2> /dev/null` if $?;
+		$reply = '' if $?;
 
     } elsif ($use eq 'cmd') {
-	if ($arg) {
-	    $skip  = opt('cmd-skip', $h)  || '';
-	    $reply = `$arg`;
-	    $reply = '' if $?;
-	}
+		if ($arg) {
+			$skip  = opt('cmd-skip', $h)  || '';
+			$reply = `$arg`;
+			$reply = '' if $?;
+		}
 
     } elsif ($use eq 'web') {
-	$url  = opt('web', $h)       || '';
-	$skip = opt('web-skip', $h)  || '';
+		$url  = opt('web', $h)       || '';
+		$skip = opt('web-skip', $h)  || '';
 
-	if (exists $builtinweb{$url}) {
-	    $skip = $builtinweb{$url}->{'skip'} unless $skip;
-	    $url  = $builtinweb{$url}->{'url'};
-	}	    
-	$arg = $url;
+		if (exists $builtinweb{$url}) {
+			$skip = $builtinweb{$url}->{'skip'} unless $skip;
+			$url  = $builtinweb{$url}->{'url'};
+		}
+		$arg = $url;
 
-	if ($url) {
-	    # when using a web server to find public IPv4 address we should force use of IPv4
-	    $reply = geturl(opt('proxy', $h), $url, undef, undef, undef, undef, undef, '4') || '';
+		if ($url) {
+			# when using a web server to find public IPv4 address we should force use of IPv4
+			$reply = geturl(opt('proxy', $h), $url, undef, undef, undef, undef, undef, '4') || '';
         }
 
     } elsif (($use eq 'cisco')) {
@@ -2338,6 +2340,9 @@ sub get_ip {
         $reply = geturl('', $url, opt('fw-login', $h), opt('fw-password', $h)) || '';
         $arg   = $url;
 
+    } elsif ($use eq 'no') {
+		$reply = '0.0.0.0';
+		
     } else {
         $url  = opt('fw', $h)       || '';
         $skip = opt('fw-skip', $h)  || '';
@@ -2354,7 +2359,8 @@ sub get_ip {
         }
         if (!defined $reply) {
         $reply = '';
-    }
+	}
+	
     if ($skip) {
         $skip  =~ s/ /\\s/is;
         $reply =~ s/^.*?${skip}//is;
@@ -2365,7 +2371,7 @@ sub get_ip {
 	    $ip = filter_local($ip) if opt('fw-banlocal', $h);
     }
     if (($use ne 'ip') && (define($ip,'') eq '0.0.0.0')) {
-	$ip = undef;
+		$ip = undef;
     }
 
     debug("get_ip: using %s, %s reports %s", $use, $arg, define($ip, "<undefined>"));
@@ -2389,38 +2395,41 @@ sub get_ipv6 {
         $skip  = opt('if-skip', $h)  || '';
         $reply = `ip -6 addr list dev $arg | grep "scope.global" 2> /dev/null`;
         if ($reply =~ /.*? ([0-9:][^\/]*)/i) {
-	    $reply = $1;
+			$reply = $1;
         }
         else {
             $reply = ''
         }
     }  elsif ($usev6 eq 'cmd') {
-	$arg = opt('cmdv6', $h);
-	if ($arg) {
-	    $skip  = opt('cmdv6-skip', $h)  || '';
-	    debug("GetIPv6 cmd: %s",$arg);
-	    $reply = `$arg`;
-	    $reply = '' if $?;
-	}
+		$arg = opt('cmdv6', $h);
+		if ($arg) {
+			$skip  = opt('cmdv6-skip', $h)  || '';
+			debug("GetIPv6 cmd: %s",$arg);
+			$reply = `$arg`;
+			$reply = '' if $?;
+		}
 
     } elsif ($usev6 eq 'web') {
-	$url  = opt('webv6', $h)       || '';
-	$skip = opt('webv6-skip', $h)  || '';
+		$url  = opt('webv6', $h)       || '';
+		$skip = opt('webv6-skip', $h)  || '';
 
-	if (exists $builtinweb{$url}) {
-	    $skip = $builtinweb{$url}->{'skip'} unless $skip;
-	    $url  = $builtinweb{$url}->{'url'};
+		if (exists $builtinweb{$url}) {
+			$skip = $builtinweb{$url}->{'skip'} unless $skip;
+			$url  = $builtinweb{$url}->{'url'};
+		}
+		$arg = $url;
+
+		if ($url) {
+			# when using a web server to find our IPv6 address we should force use of IPv6
+			$reply = geturl(opt('proxy', $h), $url, undef, undef, undef, undef, undef, '6') || '';
+		}
+
+	} elsif ($usev6 eq 'no') {
+		$reply = '';
 	}
-	$arg = $url;
-
-	if ($url) {
-	    # when using a web server to find our IPv6 address we should force use of IPv6
-	    $reply = geturl(opt('proxy', $h), $url, undef, undef, undef, undef, undef, '6') || '';
-        }
-
-    }
+	
     if (!defined $reply) {
-        $reply = '';
+        $reply = '::';
     }
     if ($skip) {
         $skip  =~ s/ /\\s/is;
@@ -2530,101 +2539,99 @@ sub nic_updateable {
     my $ipv6   = $config{$host}{'wantipv6'};
 
     if ($config{$host}{'login'} eq '') {
-	warning("null login name specified for host %s.", $host);
+		warning("null login name specified for host %s.", $host);
 
     } elsif ($config{$host}{'password'} eq '') {
-	warning("null password specified for host %s.", $host);
+		warning("null password specified for host %s.", $host);
 
     } elsif ($opt{'force'}) {
-	info("forcing update of %s.", $host);
-	$update = 1;
+		info("forcing update of %s.", $host);
+		$update = 1;
 
     } elsif (!exists($cache{$host})) {
-	info("forcing updating %s because no cached entry exists.", $host);
-	$update = 1;
+		info("forcing updating %s because no cached entry exists.", $host);
+		$update = 1;
 
     } elsif ($cache{$host}{'wtime'} && $cache{$host}{'wtime'} > $now) {
-	warning("cannot update %s from %s to %s until after %s.", 
-		$host, 
-		($cache{$host}{'ip'} ? $cache{$host}{'ip'} : '<nothing>'), $ip,
-		prettytime($cache{$host}{'wtime'})
-	);
+		warning("cannot update %s from %s to %s until after %s.", 
+		 $host, 
+		 ($cache{$host}{'ip'} ? $cache{$host}{'ip'} : '<nothing>'), $ip,
+		 prettytime($cache{$host}{'wtime'})
+		);
 
     } elsif ($cache{$host}{'mtime'} && interval_expired($host, 'mtime', 'max-interval')) {
-	warning("forcing update of %s from %s to %s; %s since last update on %s.", 
-		$host, 
-		($cache{$host}{'ip'} ? $cache{$host}{'ip'} : '<nothing>'), $ip,
-		prettyinterval($config{$host}{'max-interval'}),
-		prettytime($cache{$host}{'mtime'})
-	);
-	$update = 1;
+		warning("forcing update of %s from %s to %s; %s since last update on %s.", 
+		 $host, 
+		 ($cache{$host}{'ip'} ? $cache{$host}{'ip'} : '<nothing>'), $ip,
+		 prettyinterval($config{$host}{'max-interval'}),
+		 prettytime($cache{$host}{'mtime'})
+		);
+		$update = 1;
 
-    } elsif ((!exists($cache{$host}{'ip'})) ||
-		    ("$cache{$host}{'ip'}" ne "$ip")) {
+    } elsif (defined($cache{$host}{'use'} && ($cache{$host}{'use'} ne 'no')) &&
+			 ((!exists($cache{$host}{'ip'})) || ("$cache{$host}{'ip'}" ne "$ip"))) {
 	    if (($cache{$host}{'status'} eq 'good') && 
 			    !interval_expired($host, 'mtime', 'min-interval')) {
 
-	    warning("skipping update of %s from %s to %s.\nlast updated %s.\nWait at least %s between update attempts.", 
-		 $host, 
-		 ($cache{$host}{'ip'}    ? $cache{$host}{'ip'}                : '<nothing>'), 
-		 $ip,
-		 ($cache{$host}{'mtime'} ? prettytime($cache{$host}{'mtime'}) : '<never>'),
-		 prettyinterval($config{$host}{'min-interval'})		
-		 )
-		if opt('verbose') || !define($cache{$host}{'warned-min-interval'}, 0);
-
-	    $cache{$host}{'warned-min-interval'} = $now;
+			warning("skipping update of %s from %s to %s.\nlast updated %s.\nWait at least %s between update attempts.", 
+			 $host, 
+			 ($cache{$host}{'ip'}    ? $cache{$host}{'ip'}                : '<nothing>'), 
+			 $ip,
+			 ($cache{$host}{'mtime'} ? prettytime($cache{$host}{'mtime'}) : '<never>'),
+			 prettyinterval($config{$host}{'min-interval'})		
+			)
+			if opt('verbose') || !define($cache{$host}{'warned-min-interval'}, 0);
+				$cache{$host}{'warned-min-interval'} = $now;
 	    
-	} elsif (($cache{$host}{'status'} ne 'good') && !interval_expired($host, 'atime', 'min-error-interval')) {
+		} elsif (($cache{$host}{'status'} ne 'good') && !interval_expired($host, 'atime', 'min-error-interval')) {
 
-	    warning("skipping update of %s from %s to %s.\nlast updated %s but last attempt on %s failed.\nWait at least %s between update attempts.",
-		 $host,
-		 ($cache{$host}{'ip'}    ? $cache{$host}{'ip'}                : '<nothing>'),
-		 $ip,
-		 ($cache{$host}{'mtime'} ? prettytime($cache{$host}{'mtime'}) : '<never>'),
-		 ($cache{$host}{'atime'} ? prettytime($cache{$host}{'atime'}) : '<never>'),
-		 prettyinterval($config{$host}{'min-error-interval'})
-		 )
-		if opt('verbose') || !define($cache{$host}{'warned-min-error-interval'}, 0);
+			warning("skipping update of %s from %s to %s.\nlast updated %s but last attempt on %s failed.\nWait at least %s between update attempts.",
+			 $host,
+			 ($cache{$host}{'ip'}    ? $cache{$host}{'ip'}                : '<nothing>'),
+			 $ip,
+			 ($cache{$host}{'mtime'} ? prettytime($cache{$host}{'mtime'}) : '<never>'),
+			 ($cache{$host}{'atime'} ? prettytime($cache{$host}{'atime'}) : '<never>'),
+			 prettyinterval($config{$host}{'min-error-interval'})
+			)
+			if opt('verbose') || !define($cache{$host}{'warned-min-error-interval'}, 0);
+				$cache{$host}{'warned-min-error-interval'} = $now;
 
-	    $cache{$host}{'warned-min-error-interval'} = $now;
-
-	} else {
-	    $update = 1;
-	}
-    } elsif ((!exists($cache{$host}{'ipv6'})) ||
-                    ("$cache{$host}{'ipv6'}" ne "$ipv6")) {
+		} else {
+			$update = 1;
+		}
+		
+    } elsif (defined($cache{$host}{'usev6'} && ($cache{$host}{'usev6'} ne 'no') ) &&
+			 ((!exists($cache{$host}{'ipv6'})) || ("$cache{$host}{'ipv6'}" ne "$ipv6"))) {
         if (($cache{$host}{'status'} eq 'good') &&
              !interval_expired($host, 'mtime', 'min-interval')) {
             warning("skipping update of %s from %s to %s.\nlast updated %s.\nWait at least %s between update attempts.",
-			$host,
-			($cache{$host}{'ipv6'}    ? $cache{$host}{'ipv6'}                : '<nothing>'),
-			$ipv6,
-			($cache{$host}{'mtime'} ? prettytime($cache{$host}{'mtime'}) : '<never>'),
-			prettyinterval($config{$host}{'min-interval'})
+			 $host,
+			 ($cache{$host}{'ipv6'}    ? $cache{$host}{'ipv6'}                : '<nothing>'),
+			 $ipv6,
+			 ($cache{$host}{'mtime'} ? prettytime($cache{$host}{'mtime'}) : '<never>'),
+			 prettyinterval($config{$host}{'min-interval'})
             )
             if opt('verbose') || !define($cache{$host}{'warned-min-interval'}, 0);
-
-            $cache{$host}{'warned-min-interval'} = $now;
+				$cache{$host}{'warned-min-interval'} = $now;
 
         } elsif (($cache{$host}{'status'} ne 'good') && !interval_expired($host, 'atime', 'min-error-interval')) {
             warning("skipping update of %s from %s to %s.\nlast updated %s but last attempt on %s failed.\nWait at least %s between update attempts.",
-			$host, 
-			($cache{$host}{'ipv6'}    ? $cache{$host}{'ipv6'}                : '<nothing>'),
-			$ipv6,
-			($cache{$host}{'mtime'} ? prettytime($cache{$host}{'mtime'}) : '<never>'),
-			($cache{$host}{'atime'} ? prettytime($cache{$host}{'atime'}) : '<never>'),
-			prettyinterval($config{$host}{'min-error-interval'})
+			 $host, 
+			 ($cache{$host}{'ipv6'}    ? $cache{$host}{'ipv6'}                : '<nothing>'),
+			 $ipv6,
+			 ($cache{$host}{'mtime'} ? prettytime($cache{$host}{'mtime'}) : '<never>'),
+			 ($cache{$host}{'atime'} ? prettytime($cache{$host}{'atime'}) : '<never>'),
+			 prettyinterval($config{$host}{'min-error-interval'})
             )
             if opt('verbose') || !define($cache{$host}{'warned-min-error-interval'}, 0);
-
-            $cache{$host}{'warned-min-error-interval'} = $now;
+				$cache{$host}{'warned-min-error-interval'} = $now;
 
         } else {
             $update = 1;
         }
+        
     } elsif (defined($sub) && &$sub($host)) {
-	$update = 1;
+		$update = 1;
     } elsif ((defined($cache{$host}{'static'}) && defined($config{$host}{'static'}) &&
               ($cache{$host}{'static'} ne $config{$host}{'static'})) ||
              (defined($cache{$host}{'wildcard'}) && defined($config{$host}{'wildcard'}) &&
@@ -2633,28 +2640,29 @@ sub nic_updateable {
               ($cache{$host}{'mx'} ne $config{$host}{'mx'})) ||
              (defined($cache{$host}{'backupmx'}) && defined($config{$host}{'backupmx'}) &&
               ($cache{$host}{'backupmx'} ne $config{$host}{'backupmx'})) ) {
-	info("updating %s because host settings have been changed.", $host);
-	$update = 1;
+		info("updating %s because host settings have been changed.", $host);
+		$update = 1;
 
     } else {
-	success("%s: skipped: IP address was already set to %s.", $host, $ip)
-	    if opt('verbose');
+		success("%s: skipped: IP address was already set to %s.", $host, $ip)
+			if opt('verbose');
     }
     $config{$host}{'status'} = define($cache{$host}{'status'},'');
     $config{$host}{'update'} = $update;
     if ($update) {
-	$config{$host}{'status'}                    = 'noconnect';
-	$config{$host}{'atime'}                     = $now;
-	$config{$host}{'wtime'}                     = 0;
-	$config{$host}{'warned-min-interval'}       = 0;
-	$config{$host}{'warned-min-error-interval'} = 0;
+		$config{$host}{'status'}                    = 'noconnect';
+		$config{$host}{'atime'}                     = $now;
+		$config{$host}{'wtime'}                     = 0;
+		$config{$host}{'warned-min-interval'}       = 0;
+		$config{$host}{'warned-min-error-interval'} = 0;
 
-	delete $cache{$host}{'warned-min-interval'};
-	delete $cache{$host}{'warned-min-error-interval'};
+		delete $cache{$host}{'warned-min-interval'};
+		delete $cache{$host}{'warned-min-error-interval'};
     }
 	    
     return $update;
 }
+
 ######################################################################
 ## header_ok
 ######################################################################