diff --git a/src/firewall.c b/src/firewall.c
index 0a0dad65..814b5a72 100644
--- a/src/firewall.c
+++ b/src/firewall.c
@@ -686,3 +686,9 @@ ev_fw_sync_with_authserver(struct wd_request_context *context)
 	}
 }
 
+void 
+conntrack_flush()
+{
+	debug(LOG_DEBUG, "Flush conntrack");
+	execute("conntrack -F", 0);
+}
\ No newline at end of file
diff --git a/src/firewall.h b/src/firewall.h
index 168abeb5..6aff0385 100644
--- a/src/firewall.h
+++ b/src/firewall.h
@@ -125,4 +125,6 @@ void ev_fw_sync_with_authserver(struct wd_request_context *);
 /** @brief  */
 void ev_fw_sync_with_authserver_v2(struct wd_request_context *);
 
+void conntrack_flush();
+
 #endif                          /* _FIREWALL_H_ */
diff --git a/src/gateway.c b/src/gateway.c
index cb5f26ab..6ddf6c0d 100644
--- a/src/gateway.c
+++ b/src/gateway.c
@@ -355,6 +355,7 @@ wd_init(s_config *config)
     }
 
 #if 1
+    conntrack_flush();
      /* Reset the firewall (if WiFiDog crashed) */
     fw_destroy();
     /* Then initialize it */