diff --git a/deploy/release/t20251219/start.sh b/deploy/release/t20251219/start.sh
index 25b4f37..b23ede2 100644
--- a/deploy/release/t20251219/start.sh
+++ b/deploy/release/t20251219/start.sh
@@ -99,6 +99,7 @@ __prepare_environment() {
 }
 
 __main() {
+	echo '0' >/proc/sys/net/ipv4/ip_unprivileged_port_start
 	__prepare_environment
 	echo "$(date '+%Y-%m-%d %H:%M:%S') start.sh"