diff --git a/xCAT-client/bin/pping b/xCAT-client/bin/pping
index 66f5f6231..731a1f9f2 100755
--- a/xCAT-client/bin/pping
+++ b/xCAT-client/bin/pping
@@ -179,7 +179,7 @@ sub nmap_pping {
 	my @nmap_options = xCAT::TableUtils->get_site_attribute("nmapoptions"); 
 	my $more_options = $nmap_options[0];
 
-    open (FPING, "nmap -PE --system-dns --send-ip -sP $more_options ".join(' ',@$nodes). " 2> /dev/null|") or die("Cannot open nmap pipe: $!");
+    open (FPING, "nmap -PE --unprivileged --system-dns --send-ip -sP $more_options ".join(' ',@$nodes). " 2> /dev/null|") or die("Cannot open nmap pipe: $!");
     my $node;
     while (<FPING>) {
       if (/Host (.*) \(.*\) appears to be up/) {
diff --git a/xCAT-server/lib/xcat/plugins/nodestat.pm b/xCAT-server/lib/xcat/plugins/nodestat.pm
index e8f04b181..957ecf170 100644
--- a/xCAT-server/lib/xcat/plugins/nodestat.pm
+++ b/xCAT-server/lib/xcat/plugins/nodestat.pm
@@ -641,9 +641,9 @@ sub process_request_nmap {
 
    foreach my $ip6 (0,1) { #first pass, ipv4, second pass ipv6
 	   if ($ip6 and scalar(@ip6s)) {
-		   open($fping,"nmap -6 -PS$ports,3001 -n --send-ip -p $ports,3001 $more_options ".join(' ',@ip6s). " 2> /dev/null|") or die("Can't start nmap: $!");
+		   open($fping,"nmap --unprivileged -6 -PS$ports,3001 -n --send-ip -p $ports,3001 $more_options ".join(' ',@ip6s). " 2> /dev/null|") or die("Can't start nmap: $!");
 	   } elsif (not $ip6 and scalar(@ips)) {
-		   open($fping,"nmap -PE -n --send-ip -p $ports,3001 $more_options ".join(' ',@ips). " 2> /dev/null|") or die("Can't start nmap: $!");
+		   open($fping,"nmap --unprivileged -PE -n --send-ip -p $ports,3001 $more_options ".join(' ',@ips). " 2> /dev/null|") or die("Can't start nmap: $!");
 	   } else { next; }
 	   while (<$fping>) {
 		   if (/Interesting ports on ([^ ]*)[: ]/ or /Nmap scan report for ([^ ]*)/) {