1 files changed, 7 insertions, 0 deletions

diff --git a/networking/ntpd.c b/networking/ntpd.c
index 98158a304..1a3367be2 100644
--- a/networking/ntpd.c
+++ b/networking/ntpd.c
@@ -2051,6 +2051,13 @@ recv_and_process_client_pkt(void /*int fd*/)
                 goto bail;
         }
 
+        /* Respond only to client and symmetric active packets */
+        if ((msg.m_status & MODE_MASK) != MODE_CLIENT
+         && (msg.m_status & MODE_MASK) != MODE_SYM_ACT
+        ) {
+                goto bail;
+        }
+
         query_status = msg.m_status;
         query_xmttime = msg.m_xmttime;