Merge pull request #269288 from rcdun/nickb/aoi-clarify-firewall-commands

Add instruction for setting inbound firewall config.

Author: prmerger-automator[bot]

articles/operator-insights/set-up-ingestion-agent.md

@@ -143,6 +143,14 @@ Repeat these steps for each VM onto which you want to install the agent.
     - Port 36001/TCP inbound from the MCCs
     - Port 443/TCP outbound to Azure
 
+    You can configure the inbound rule with:
+    ```
+    sudo firewall-cmd --permanent --new-service=mcc-connection 
+    sudo firewall-cmd --permanent --service=mcc-connection --add-port=36001/tcp 
+    sudo firewall-cmd --add-service=mcc-connection --permanent 
+    sudo firewall-cmd --reload
+    ```
+
     ---
 
 ## Ensure that VM can resolve Microsoft hostnames