diff --git a/xCAT-server/lib/xcat/plugins/ddns.pm b/xCAT-server/lib/xcat/plugins/ddns.pm
index 266d15410..5f468b3e5 100755
--- a/xCAT-server/lib/xcat/plugins/ddns.pm
+++ b/xCAT-server/lib/xcat/plugins/ddns.pm
@@ -423,6 +423,8 @@ sub process_request {
         my $names;
         my @hosts;
         my %nodehash;
+        my @eachhost;
+        my $invalid;
 
         foreach (@contents) {
             chomp;            #no newline
@@ -439,6 +441,18 @@ sub process_request {
                 xCAT::SvrUtils::sendmsg(":Ignoring line $_ in /etc/hosts, names  $names contain invalid characters (valid characters include a through z, numbers and the '-', but not '_'", $callback);
                 next;
             }
+            $invalid = "";
+            @eachhost = split(/ /,$names);
+            foreach my $hname (@eachhost) {
+                if ($hname =~ /^\./) {
+                    xCAT::SvrUtils::sendmsg(":Ignoring line $_ in /etc/hosts, name $hname start with . ", $callback);
+                    $invalid = $names;
+                    last;
+                }
+            }
+            if ($invalid) {
+                next;
+            }
 
             my ($host, $ip) = xCAT::NetworkUtils->gethostnameandip($addr);
             push @hosts, $host;