diff --git a/src/etcp_connections.c b/src/etcp_connections.c
index 9cc86779..d769e6d2 100644
--- a/src/etcp_connections.c
+++ b/src/etcp_connections.c
@@ -1518,7 +1518,7 @@ void etcp_connections_read_callback_socket(socket_t sock, void* arg) {
     loadbalancer_link_ready(link);
     // Restart NAT check after link is up (e.g. after address change or reinit)
     if (link->etcp->instance->bgp) {
-        route_bgp_start_link_nat_check(link->etcp->instance->bgp, link);
+        if (link->nat_check_status < NAT_CHECK_IN_PROGRESS) route_bgp_start_link_nat_check(link->etcp->instance->bgp, link);
     }
     return;
 
diff --git a/src/route_bgp.c b/src/route_bgp.c
index bd239e07..f3c3fddd 100644
--- a/src/route_bgp.c
+++ b/src/route_bgp.c
@@ -1120,7 +1120,7 @@ void route_bgp_request_nat_check_all(struct ROUTE_BGP* bgp) {
     while (conn) {
         struct ETCP_LINK* link = conn->links;
         while (link) {
-            route_bgp_start_link_nat_check(bgp, link);
+            if (link->nat_check_status < NAT_CHECK_IN_PROGRESS) route_bgp_start_link_nat_check(bgp, link);
             count++;
             link = link->next;
         }