diff --git a/html/cgi-bin/guardian.cgi b/html/cgi-bin/guardian.cgi
index eddbb6e95..634f87d53 100644
--- a/html/cgi-bin/guardian.cgi
+++ b/html/cgi-bin/guardian.cgi
@@ -202,7 +202,7 @@ if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
 		&General::writehasharray($ignoredfile, \%ignored);
 
 		# Regenerate the ignore file.
-		# &GenerateIgnoreFile();
+		&GenerateIgnoreFile();
 	}
 
 	# Check if guardian is running.
@@ -245,7 +245,7 @@ if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
 		&General::writehasharray($ignoredfile, \%ignored);
 
 		# Regenerate the ignore file.
-		# &GenerateIgnoreFile();
+		&GenerateIgnoreFile();
 
 		# Check if guardian is running.
 		if ($pid > 0) {
@@ -272,7 +272,7 @@ if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
 	&General::writehasharray($ignoredfile, \%ignored);
 
 	# Regenerate the ignore file.
-	# &GenerateIgnoreFile();
+	&GenerateIgnoreFile();
 
 	# Check if guardian is running.
 	if ($pid > 0) {
@@ -928,3 +928,119 @@ sub BuildConfiguration() {
 		system("/usr/local/bin/addonctrl guardian stop &>/dev/null");
 	}
 }
+
+sub GenerateIgnoreFile() {
+	my %ignored = ();
+
+	# Read-in ignoredfile.
+	&General::readhasharray($ignoredfile, \%ignored);
+
+	# Open ignorefile for writing.
+	open(FILE, ">$ignorefile");
+
+	# Config file header.
+	print FILE "# Autogenerated configuration file.\n";
+	print FILE "# All user modifications will be overwritten.\n\n";
+
+	# Add IFPire interfaces and gateway to the ignore file.
+	#
+	# Assign some temporary variables for the IPFire interfaces.
+	my $green = $netsettings{'GREEN_ADDRESS'};
+	my $blue = $netsettings{'BLUE_ADDRESS'};
+	my $orange = $netsettings{'ORANGE_ADDRESS'};
+	my $red = $netsettings{'RED_ADDRESS'};
+
+	# File declarations.
+	my $gatewayfile = "${General::swroot}/red/remote-ipaddress";
+	my $dns1file = "${General::swroot}/red/dns1";
+	my $dns2file = "${General::swroot}/red/dns2";
+
+	# Get gateway address.
+	my $gateway = &_get_address_from_file($gatewayfile);
+
+	# Get addresses from the used dns servers.
+	my $dns1 = &_get_address_from_file($dns1file);
+	my $dns2 = &_get_address_from_file($dns2file);
+
+	# Write the obtained addresses to the ignore file.
+	print FILE "# IPFire local interfaces.\n";
+	print FILE "$green\n";
+
+	# Check if a blue interface exists.
+	if ($blue) {
+		# Add blue address.
+		print FILE "$blue\n";
+	}
+
+	# Check if an orange interface exists.
+	if ($orange) {
+		# Add orange address.
+		print FILE "$orange\n";
+	}
+
+	print FILE "\n# IPFire red interface, gateway and used DNS-servers.\n";
+	print FILE "$red\n";
+	print FILE "$gateway\n";
+	print FILE "$dns1\n";
+	print FILE "$dns2\n";
+
+	# Add all user defined hosts and networks to the ignore file.
+	#
+	# Check if the hash contains any elements.
+	if (keys (%ignored)) {
+		# Write headline.
+		print FILE "# User defined hosts/networks.\n";
+
+		# Loop through the entire hash and write the host/network
+		# and remark to the ignore file.
+		while ( (my $key) = each %ignored) {
+			my $address = $ignored{$key}[0];
+			my $remark = $ignored{$key}[1];
+			my $status = $ignored{$key}[2];
+
+			# Check if the status of the entry is "enabled".
+			if ($status eq "enabled") {
+				# Check if the address/network is valid.
+				if ((&General::validip($address)) || (&General::validipandmask($address))) {
+					# Write the remark to the file.
+					print FILE "# $remark\n";
+
+					# Write the address/network to the ignore file.
+					print FILE "$address\n\n";
+				}
+			}
+                }
+	}
+
+	close(FILE);
+}
+
+# Private subfunction to obtain IP-addresses from given file names.
+#
+sub _get_address_from_file ($) {
+	my $file = shift;
+
+	# Check if the file exists.
+	if (-e $file) {
+		# Open the given file.
+		open(FILE, "$file") or die "Could not open $file.";
+
+		# Obtain the address from the first line of the file.
+		my $address = <FILE>;
+
+		# Close filehandle
+		close(FILE);
+
+		# Remove newlines.
+		chomp $address;
+
+		# Check if the grabbed address is valid.
+		if (&General::validip($address)) {
+			# Return the address.
+			return $address;
+		}
+	}
+
+	# Return nothing.
+	return;
+}