my $field30 = '';
my $field31 = 'dnat';
+if (! -e "$dmzconfig") {
+ print "DMZ config file not found. Exiting!\n";
+ exit(1);
+}
+
+if (! -s "$dmzconfig") {
+ print "Empty DMZ configuration file. Nothing to do. Exiting...\n";
+ exit(0);
+}
open(FILE, $dmzconfig) or die 'Unable to open config file.';
my @current = <FILE>;