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-rw-r--r--src/plugins/nat/nat.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c
index 5189416e576..36b72664f3a 100644
--- a/src/plugins/nat/nat.c
+++ b/src/plugins/nat/nat.c
@@ -1406,7 +1406,7 @@ int snat_alloc_outside_address_and_port (snat_main_t * sm,
{ \
portnum = (sm->port_per_thread * \
sm->per_thread_data[thread_index].snat_thread_index) + \
- snat_random_port(sm, 0, sm->port_per_thread) + 1024; \
+ snat_random_port(sm, 1, sm->port_per_thread) + 1024; \
if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
continue; \
clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \