diff --git a/5_optional b/5_optional
new file mode 100644
index 0000000..96fe025
--- /dev/null
+++ b/5_optional
@@ -0,0 +1,25 @@
+
+sudo ufw allow 21115/tcp 21116/tcp 21116/udp 21117/tcp 21118/tcp 21119/tcp
+
+
+sudo ufw allow 21115/tcp
+sudo ufw allow 21116/tcp
+sudo ufw allow 21116/udp
+sudo ufw allow 21117/tcp
+sudo ufw allow 21118/tcp
+sudo ufw allow 21119/tcp
+
+
+
+2025/11/20 23:02:42 [emerg] 69166#69166: unknown directive "stream" in /etc/nginx/nginx.conf:85
+nginx: configuration file /etc/nginx/nginx.conf test failed
+
+
+
+
+
+
+
+
+
+