From 9bd494567f5b8d016bcc03414816ca822d16d596 Mon Sep 17 00:00:00 2001
From: Joerg Lehmann <joerg.lehmann@nbit.ch>
Date: Thu, 29 Dec 2022 19:39:44 +0100
Subject: [PATCH] document firewall rule for mqtt access

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 2fd56d2..0c3bcf3 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,7 @@ enable EPEL Repo:
 # dnf install firewalld
 # firewall-cmd --add-service={http,https} --permanent
 # firewall-cmd --remove-service=cockpit --permanent
+# firewall-cmd --add-port=1883/tcp --permanent   ; only for MQTT
 # firewall-cmd --reload
 
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