diff --git a/xCAT-server/lib/perl/xCAT/IPMI.pm b/xCAT-server/lib/perl/xCAT/IPMI.pm
index 775583368..a11d52f67 100644
--- a/xCAT-server/lib/perl/xCAT/IPMI.pm
+++ b/xCAT-server/lib/perl/xCAT/IPMI.pm
@@ -682,9 +682,14 @@ sub handle_ipmi_packet {
             if ($rsp[5] & 0b10000000) {
                 $encrypted = 1;
             }
+
+#------------------------modified to support openbmc ipmi command----------------
             unless ($rsp[5] & 0b01000000) {
-                return 3; #we refuse to examine unauthenticated packets in this context
+                if ($self->{max_privilege} != 0) {
+                    return 3; #we refuse to examine unauthenticated packets in this context
+                }
             }
+
             splice(@rsp, 0, 4);    #ditch the rmcp header
             my @authcode = splice(@rsp, -12); #strip away authcode and remember it
             my @expectedcode = unpack("C*", hmac_sha1(pack("C*", @rsp), $self->{k1}));
@@ -766,10 +771,13 @@ sub got_rmcp_response {
         return 9;
     }
     $byte = shift @data;
-    unless ($byte >= 4) {
+
+    # add $byte == 0 to support openbmc ipmi command
+    unless ($byte >= 4 or $byte == 0) {
         $self->{onlogon}->("ERROR: Cannot acquire sufficient privilege", $self->{onlogon_args});
         return 9;
     }
+    $self->{max_privilege} = $byte if ($byte == 0);
     splice @data, 0, 5;
     $self->{pendingsessionid} = [ splice @data, 0, 4 ];