diff --git a/nest/proto.c b/nest/proto.c
index 31ee1fa1..7cfb1555 100644
--- a/nest/proto.c
+++ b/nest/proto.c
@@ -2243,8 +2243,13 @@ proto_apply_cmd_symbol(const struct symbol *s, void (* cmd)(struct proto *, uint
     return;
   }
 
-  cmd(s->proto->proto, arg, 0);
-  cli_msg(0, "");
+  if (s->proto->proto)
+  {
+    cmd(s->proto->proto, arg, 0);
+    cli_msg(0, "");
+  }
+  else
+    cli_msg(9002, "%s does not exist", s->name);
 }
 
 static void
diff --git a/nest/protocol.h b/nest/protocol.h
index abcc505d..6ee97b7c 100644
--- a/nest/protocol.h
+++ b/nest/protocol.h
@@ -200,10 +200,11 @@ struct proto {
    *	   neigh_notify	Notify protocol about neighbor cache events.
    *	   make_tmp_attrs  Add attributes to rta from from private attrs stored in rte. The route and rta MUST NOT be cached.
    *	   store_tmp_attrs Store private attrs back to rte and undef added attributes. The route and rta MUST NOT be cached.
-   *	   preexport  Called as the first step of the route exporting process.
-   *			It can construct a new rte, add private attributes and
-   *			decide whether the route shall be exported: 1=yes, -1=no,
-   *			0=process it through the export filter set by the user.
+   *	   preexport	Called as the first step of the route exporting process.
+   *			It can decide whether the route shall be exported:
+   *			  -1 = reject,
+   *			   0 = continue to export filter
+   *			   1 = accept immediately
    *	   reload_routes   Request channel to reload all its routes to the core
    *			(using rte_update()). Returns: 0=reload cannot be done,
    *			1= reload is scheduled and will happen (asynchronously).
@@ -217,7 +218,7 @@ struct proto {
   void (*neigh_notify)(struct neighbor *neigh);
   void (*make_tmp_attrs)(struct rte *rt, struct linpool *pool);
   void (*store_tmp_attrs)(struct rte *rt, struct linpool *pool);
-  int (*preexport)(struct proto *, struct rte **rt, struct linpool *pool);
+  int (*preexport)(struct proto *, struct rte *rt);
   void (*reload_routes)(struct channel *);
   void (*feed_begin)(struct channel *, int initial);
   void (*feed_end)(struct channel *);
diff --git a/nest/route.h b/nest/route.h
index 7930058a..75890a71 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -378,7 +378,7 @@ int rte_update_in(struct channel *c, const net_addr *n, rte *new, struct rte_src
 int rt_reload_channel(struct channel *c);
 void rt_reload_channel_abort(struct channel *c);
 void rt_prune_sync(rtable *t, int all);
-int rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, int refeed);
+int rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old, rte **old_exported, int refeed);
 struct rtable_config *rt_new_table(struct symbol *s, uint addr_type);
 
 static inline int rt_is_ip(rtable *tab)
diff --git a/nest/rt-show.c b/nest/rt-show.c
index f8b7ba51..b24befa2 100644
--- a/nest/rt-show.c
+++ b/nest/rt-show.c
@@ -154,7 +154,7 @@ rt_show_net(struct cli *c, net *n, struct rt_show_data *d)
       else if (d->export_mode)
 	{
 	  struct proto *ep = ec->proto;
-	  int ic = ep->preexport ? ep->preexport(ep, &e, c->show_pool) : 0;
+	  int ic = ep->preexport ? ep->preexport(ep, e) : 0;
 
 	  if (ec->ra_mode == RA_OPTIMAL || ec->ra_mode == RA_MERGED)
 	    pass = 1;
@@ -393,7 +393,7 @@ rt_show_get_default_tables(struct rt_show_data *d)
   }
 
   for (int i=1; i<NET_MAX; i++)
-    if (config->def_tables[i])
+    if (config->def_tables[i] && config->def_tables[i]->table)
       rt_show_add_table(d, config->def_tables[i]->table);
 }
 
diff --git a/nest/rt-table.c b/nest/rt-table.c
index a10979e6..36bf1364 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -617,6 +617,26 @@ rte_cow_rta(rte *r, linpool *lp)
   return r;
 }
 
+/**
+ * rte_free - delete a &rte
+ * @e: &rte to be deleted
+ *
+ * rte_free() deletes the given &rte from the routing table it's linked to.
+ */
+void
+rte_free(rte *e)
+{
+  if (rta_is_cached(e->attrs))
+    rta_free(e->attrs);
+  sl_free(rte_slab, e);
+}
+
+static inline void
+rte_free_quick(rte *e)
+{
+  rta_free(e->attrs);
+  sl_free(rte_slab, e);
+}
 
 /**
  * rte_init_tmp_attrs - initialize temporary ea_list for route
@@ -869,7 +889,7 @@ export_filter_(struct channel *c, rte *rt0, rte **rt_free, linpool *pool, int si
   rt = rt0;
   *rt_free = NULL;
 
-  v = p->preexport ? p->preexport(p, &rt, pool) : 0;
+  v = p->preexport ? p->preexport(p, rt) : 0;
   if (v < 0)
     {
       if (silent)
@@ -951,8 +971,14 @@ do_rt_notify(struct channel *c, net *net, rte *new, rte *old, int refeed)
   }
 
   /* Apply export table */
-  if (c->out_table && !rte_update_out(c, net->n.addr, new, old, refeed))
-    return;
+  struct rte *old_exported = NULL;
+  if (c->out_table)
+  {
+    if (!rte_update_out(c, net->n.addr, new, old, &old_exported, refeed))
+      return;
+  }
+  else if (c->out_filter == FILTER_ACCEPT)
+    old_exported = old;
 
   if (new)
     stats->exp_updates_accepted++;
@@ -982,6 +1008,9 @@ do_rt_notify(struct channel *c, net *net, rte *new, rte *old, int refeed)
   }
 
   p->rt_notify(p, c, net, new, old);
+
+  if (c->out_table && old_exported)
+    rte_free_quick(old_exported);
 }
 
 static void
@@ -1341,27 +1370,6 @@ rte_validate(rte *e)
   return 1;
 }
 
-/**
- * rte_free - delete a &rte
- * @e: &rte to be deleted
- *
- * rte_free() deletes the given &rte from the routing table it's linked to.
- */
-void
-rte_free(rte *e)
-{
-  if (rta_is_cached(e->attrs))
-    rta_free(e->attrs);
-  sl_free(rte_slab, e);
-}
-
-static inline void
-rte_free_quick(rte *e)
-{
-  rta_free(e->attrs);
-  sl_free(rte_slab, e);
-}
-
 static int
 rte_same(rte *x, rte *y)
 {
@@ -1894,7 +1902,7 @@ rt_examine(rtable *t, net_addr *a, struct proto *p, const struct filter *filter)
   rte_update_lock();
 
   /* Rest is stripped down export_filter() */
-  int v = p->preexport ? p->preexport(p, &rt, rte_update_pool) : 0;
+  int v = p->preexport ? p->preexport(p, rt) : 0;
   if (v == RIC_PROCESS)
   {
     rte_make_tmp_attrs(&rt, rte_update_pool, NULL);
@@ -3426,7 +3434,7 @@ again:
  */
 
 int
-rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, int refeed)
+rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, rte **old_exported, int refeed)
 {
   struct rtable *tab = c->out_table;
   struct rte_src *src;
@@ -3472,7 +3480,7 @@ rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, int re
 
       /* Remove the old rte */
       *pos = old->next;
-      rte_free_quick(old);
+      *old_exported = old;
       tab->rt_count--;
 
       break;
diff --git a/proto/babel/babel.c b/proto/babel/babel.c
index 174fc9e2..0444e7a4 100644
--- a/proto/babel/babel.c
+++ b/proto/babel/babel.c
@@ -2231,10 +2231,9 @@ babel_kick_timer(struct babel_proto *p)
 
 
 static int
-babel_preexport(struct proto *P, struct rte **new, struct linpool *pool UNUSED)
+babel_preexport(struct proto *P, struct rte *new)
 {
-  struct rta *a = (*new)->attrs;
-
+  struct rta *a = new->attrs;
   /* Reject our own unreachable routes */
   if ((a->dest == RTD_UNREACHABLE) && (a->src->proto == P))
     return -1;
diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c
index 6c1ae176..c35f9384 100644
--- a/proto/bgp/attrs.c
+++ b/proto/bgp/attrs.c
@@ -1668,9 +1668,8 @@ bgp_free_prefix(struct bgp_channel *c, struct bgp_prefix *px)
  */
 
 int
-bgp_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
+bgp_preexport(struct proto *P, rte *e)
 {
-  rte *e = *new;
   struct proto *SRC = e->attrs->src->proto;
   struct bgp_proto *p = (struct bgp_proto *) P;
   struct bgp_proto *src = (SRC->proto == &proto_bgp) ? (struct bgp_proto *) SRC : NULL;
diff --git a/proto/bgp/bgp.h b/proto/bgp/bgp.h
index f2c11869..9d25da21 100644
--- a/proto/bgp/bgp.h
+++ b/proto/bgp/bgp.h
@@ -585,7 +585,7 @@ int bgp_rte_mergable(rte *pri, rte *sec);
 int bgp_rte_recalculate(rtable *table, net *net, rte *new, rte *old, rte *old_best);
 struct rte *bgp_rte_modify_stale(struct rte *r, struct linpool *pool);
 void bgp_rt_notify(struct proto *P, struct channel *C, net *n, rte *new, rte *old);
-int bgp_preexport(struct proto *, struct rte **, struct linpool *);
+int bgp_preexport(struct proto *, struct rte *);
 int bgp_get_attr(const struct eattr *e, byte *buf, int buflen);
 void bgp_get_route_info(struct rte *, byte *buf);
 int bgp_total_aigp_metric_(rte *e, u64 *metric, const struct adata **ad);
diff --git a/proto/ospf/ospf.c b/proto/ospf/ospf.c
index ebebf0ff..48e078ed 100644
--- a/proto/ospf/ospf.c
+++ b/proto/ospf/ospf.c
@@ -107,7 +107,7 @@
 #include <stdlib.h>
 #include "ospf.h"
 
-static int ospf_preexport(struct proto *P, rte **new, struct linpool *pool);
+static int ospf_preexport(struct proto *P, rte *new);
 static void ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool);
 static void ospf_store_tmp_attrs(struct rte *rt, struct linpool *pool);
 static void ospf_reload_routes(struct channel *C);
@@ -484,11 +484,10 @@ ospf_disp(timer * timer)
  * import to the filters.
  */
 static int
-ospf_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
+ospf_preexport(struct proto *P, rte *e)
 {
   struct ospf_proto *p = (struct ospf_proto *) P;
   struct ospf_area *oa = ospf_main_area(p);
-  rte *e = *new;
 
   /* Reject our own routes */
   if (e->attrs->src->proto == P)
diff --git a/proto/pipe/pipe.c b/proto/pipe/pipe.c
index f991d09a..cc4b5a07 100644
--- a/proto/pipe/pipe.c
+++ b/proto/pipe/pipe.c
@@ -101,9 +101,9 @@ pipe_rt_notify(struct proto *P, struct channel *src_ch, net *n, rte *new, rte *o
 }
 
 static int
-pipe_preexport(struct proto *P, rte **ee, struct linpool *p UNUSED)
+pipe_preexport(struct proto *P, rte *e)
 {
-  struct proto *pp = (*ee)->sender->proto;
+  struct proto *pp = e->sender->proto;
 
   if (pp == P)
     return -1;	/* Avoid local loops automatically */
diff --git a/proto/radv/radv.c b/proto/radv/radv.c
index 66e8eb4b..540ff2a7 100644
--- a/proto/radv/radv.c
+++ b/proto/radv/radv.c
@@ -391,12 +391,12 @@ radv_net_match_trigger(struct radv_config *cf, net *n)
 }
 
 int
-radv_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
+radv_preexport(struct proto *P, rte *new)
 {
   // struct radv_proto *p = (struct radv_proto *) P;
   struct radv_config *cf = (struct radv_config *) (P->cf);
 
-  if (radv_net_match_trigger(cf, (*new)->net))
+  if (radv_net_match_trigger(cf, new->net))
     return RIC_PROCESS;
 
   if (cf->propagate_routes)
diff --git a/sysdep/unix/krt.c b/sysdep/unix/krt.c
index 7c2614b1..da61fc9c 100644
--- a/sysdep/unix/krt.c
+++ b/sysdep/unix/krt.c
@@ -903,11 +903,9 @@ krt_store_tmp_attrs(struct rte *rt, struct linpool *pool)
 }
 
 static int
-krt_preexport(struct proto *P, rte **new, struct linpool *pool UNUSED)
+krt_preexport(struct proto *P, rte *e)
 {
   // struct krt_proto *p = (struct krt_proto *) P;
-  rte *e = *new;
-
   if (e->attrs->src->proto == P)
     return -1;